CN106833590A

CN106833590A - A kind of Water-In-Oil association type displacement of reservoir oil concentration thickener and preparation method thereof

Info

Publication number: CN106833590A
Application number: CN201710193217.2A
Authority: CN
Inventors: 郭拥军; 杨雪杉; 梁严
Original assignee: SICHUAN GUANGYA POLYMER CHEMICAL CO Ltd
Current assignee: SICHUAN GUANGYA POLYMER CHEMICAL CO Ltd
Priority date: 2017-03-28
Filing date: 2017-03-28
Publication date: 2017-06-13

Abstract

The invention provides a kind of Water-In-Oil association type displacement of reservoir oil with concentration thickener, including following mass percent component：The decentralized medium of 25wt%~50wt%, the decentralized medium is and the mutual exclusive organic solvent of water；The dispersed phase of 18wt%~45wt%, the dispersed phase is water；The hydrophobic associated polymer displacement of reservoir oil thickener of 20wt%~40wt%；The compound emulsifying agent of 2.5wt%~6wt%, the compound emulsifying agent is the compound emulsifying agent of the emulsifying agent that HLB value is 3~7 and the emulsifying agent compounding that HLB value is 8~10.Concentration thickener stabilization time prepared by the present invention is more than 120d, and dissolution time is less than 5min, and the Properties of Copolymer Solution that the concentration thickener prepared by the present invention is prepared is better than the Properties of Copolymer Solution directly prepared by correspondence displacement of reservoir oil thickener dry powder.

Description

A kind of Water-In-Oil association type displacement of reservoir oil concentration thickener and preparation method thereof

Technical field

The invention belongs to oil technology of reservoir sweep field, and in particular to a kind of Water-In-Oil association type displacement of reservoir oil with concentration thickener and Its preparation method.

Background technology

With deepening continuously for In Oil Field Exploration And Development, continue to look for new petroleum resources and seemed unrealistic；While with The Persisting exploitation in existing oil field, it is initial once, secondary oil recovery method can not realize good oil extraction effect, seek New method further improve developed field oil recovery factor (tertiary oil recovery) turned into stable production of crude oil and volume increase necessarily become Gesture.At present, chemical flooding (changes displacing phase property and displacing phase to come with the interfacial property of crude oil to chemical agent is injected in oil reservoir Improve crude oil recovery percent of reserves method) already as the waterflooding extraction main force of China oil field main raising recovery efficiency technique method and The main direction of recovery ratio research improves in China.Chemical flooding mainly includes that polymer flooding, polymer/surfactant binary are combined (SP), alkali/Surfactant/Polymer ternary composite driving (ASP) are driven, wherein polymer flooding is due to that can improve oil and water mobility ratio And then expand the advantage of swept volume and be most widely used in chemical flooding；SP systems are relatively lagged behind and system due to research Complexity, widespread popularity is taken second place, but it has improvement oil and water mobility ratio concurrently and then expands swept volume and reduce oil-water interfaces The advantage of power and then increase displacement efficiency；Widespread popularity is poor because alkali has the problems brought for ASP systems.

With the popularization goed deep into and apply of research, water-soluble polymer has been widely used for oilfield chemistry and drives raising harvesting Rate, these water-soluble polymers are usually acrylamide copolymer, particularly partially hydrolyzed polyacrylamide (PHPA) (HPAM), or picture The large biological molecule of xanthans or guanidine that glue class.Wherein, HPAM due to possessing compared with the degraded of boiomacromolecule more preferable antibiont and Tackifying ability and most widely used and most ripe polymer in turning into technique of polymer flooding.However, with the oil field development time Extension, reservoir heterogeneity aggravation, high permeable strip washing degree increase cause reservoir exploitation difficulty to significantly increase, mining conditions Increasingly it is harsh, HPAM gradually shown in applying at the scene viscosity be remarkably decreased, it is anti-shearing (salt resistance) property, temperature tolerance, aging The inadaptabilities such as less stable, the application of HPAM is limited by very large.Therefore, hydrophobically associating polymers (HAWSP) also progressively receive extensive concern in academia and industrial quarters and studied exploitation (is particularly polymerized as chemical flooding Thing drives) in can make up the substitute of HPAM weak points.HAWSP is that a class introduces a small amount of hydrophobic grouping on macromolecular main chain Water-soluble polymer, in aqueous, these hydrophobic groupings can with similar to surfactant in its critical micelle concentration Micellization mode during the above and mutually associate to minimize the contact with solvent, promote polymer molecule in the solution without change Learn to be crosslinked and just can mutually associate and be formed the non-crosslinked network structure of reversible dynamic.So as to HAWSP just has under lower molecular weight There are the solution property and rheological behavior not available for many conventional H PAM, such as significant tackifying, obvious viscoplasticity, shearing increases Thick/dilution property, heat-resistant salt-resistant, shear resistant etc.；Meanwhile, the addition of some surfactant molecules can be sent out with polymer molecule Raw interaction forms mixed micelle, further enhances the heat resistance and salt tolerance of interchain so that the intermolecular non-crosslinked network of dynamic Structural strength increases, to a certain extent the characteristic with frozen glue.Therefore, HAWSP and its compound system with surfactant The great potential in chemical flooding improves the application of recovery ratio.

The above-mentioned oil-displacing system being related to and composite oil-displacing system have good application performance, based on these systems Technology of reservoir sweep progressively move to maturity.However, still having some shortcomings in the application and needing to improve part.On the one hand, it is hydrophobic Introducing for group will certainly carry out certain adverse effect to the dissolving band of polymer, and being in process for preparation in addition directly will polymerization Thing dry powder is added to the water mixing and obtains polymer solution, and powder flake is easily formed in course of dissolution, produces local caking, Dissolving is insufficient or takes longer for just being completely dissolved, and not only have impact on solution property but also has reduced efficiency of construction.The opposing party Face, when will to polymer solution in the additive such as additional surfactant form the compound system with cooperative effect when, scene Technique is to carry out mixture again after prepared polymer solution and surfactant solution respectively, and it is flat that this undoubtedly considerably increases construction Platform space, construction cost and difficulty of construction, are totally unfavorable especially for the platform that space is limited, allocation process frequency of use is high 's.

The content of the invention

In view of this, the technical problem to be solved in the present invention is to provide a kind of Water-In-Oil association type displacement of reservoir oil concentration thickening Agent and preparation method thereof, the Water-In-Oil association type displacement of reservoir oil concentration thickener that the present invention is provided can be solved effectively in continuous mixture Solubility problem, the oil displacement system for obtaining has good performance, reduces technology difficulty and production cost, while reducing ring Pollute in border.

The invention provides a kind of Water-In-Oil association type displacement of reservoir oil with concentration thickener, including following mass percent group Point：

The decentralized medium of 25wt%~50wt%, the decentralized medium is and the mutual exclusive organic solvent of water；

The dispersed phase of 18wt%~45wt%, the dispersed phase is water；

The hydrophobic associated polymer displacement of reservoir oil thickener of 20wt%~40wt%；

The compound emulsifying agent of 2.5wt%~6wt%, the compound emulsifying agent is emulsifying agent that HLB value is 3~7 and HLB value It is the compound emulsifying agent of 8~10 emulsifying agent compounding.

Preferably, the mass ratio of the emulsifying agent that the HLB value is 3~7 emulsifying agent and HLB value is 8~10 is (4~6): (1~3).

Preferably, the HLB value be 3~7 emulsifying agent be selected from polyglycerol polyricinoleate PGPR, methyl glycol fatty acid ester PGMS, oleic acid diethyl amide ODEA, polyethylene glycol dioleic acid ester PEG400DO, paregal O O-3, polyoxyethylene oleic acid ester A- 103, Emulsifier EL-60 EL-10, Emulsifier EL-60 EL-12, propylene glycol block polyether L62 and three polyglycereol two are different hard One or more in resin acid ester；

The emulsifying agent of the HLB value 8~10 is：AEO AEO-3, AEO AEO-4, Emulsifier EL-60 EL-20, Emulsifier EL-60 HEL20, diacetyl tartarate list double glyceride DATEM, stearic acid gather Oxygen vinyl acetate SG-6, laurate APEO LAE-4, paregal O O-5, polyoxyethylene oleic acid ester A-105 and polyethylene glycol One or more in bilaurate PEG400DL.

Preferably, the compound emulsifying agent is selected from three Risorex PGIS 22s with being combined that paregal O O-5 is formed Compound emulsifying agent, the double oleic acid of polyethylene glycol that emulsifying agent, methyl glycol fatty acid ester PGMS and Emulsifier EL-60 EL-20 are formed Compound emulsifying agent, paregal O O-3 and laurate polyoxyethylene that ester PEG400DO and AEO AEO-3 is formed The compound emulsifying agent of ether LAE-4 formation, polyoxyethylene oleic acid ester A-103 and diacetyl tartarate list double glyceride DATEM are formed Compound emulsifying agent, Emulsifier EL-60 EL-10 and polyoxyethylene oleic acid ester the A-105 compound emulsifying agent or propane diols that are formed The compound emulsifying agent that block polyether L62 and polyethylene glycol bilaurate PEG400DL is formed.

Preferably, hydrophobic associated polymer displacement of reservoir oil thickener is selected from acrylamide/sodium Acrylate/N- alkyl and replaces Acrylamide copolymer, acrylamide/sodium Acrylate/2- acrylamide-2-methyl propane sulfonics sodium/N- alkyl-substituted acrylamides Copolymer, acrylamide/sodium Acrylate/alkyl acrylate copolymer, acrylamide/sodium Acrylate/N- ethenyl pyrrolidones Ketone/alkyl acrylate copolymer, acrylamide/sodium Acrylate/vinylsulfonate/alkyl acrylate copolymer, propylene Acid amides/PAA/2- acrylamide-2-methyl propane sulfonics sodium/alkyl acrylate copolymer, acrylamide/sodium Acrylate/ SSS/alkyl acrylate copolymer, acrylamide/sodium Acrylate/methacrylate copolymer, propylene Acid amides/PAA/2- acrylamide-2-methyl propane sulfonics sodium/methacrylate copolymer, acrylamide/propylene Sour sodium/NVP/methacrylate copolymer, acrylamide/sodium Acrylate/SSS/ Methacrylate copolymer, acrylamide/sodium Acrylate/vinylsulfonate/methacrylate copolymer, The alkyl acrylate copolymer of acrylamide/sodium Acrylate/fluorine substitution, the methyl-prop of acrylamide/sodium Acrylate/fluorine substitution Olefin(e) acid alkyl ester copolymer, acrylamide/sodium Acrylate/allyl alkyl quaternized copolymer, acrylamide/sodium Acrylate/ 2- acrylamide-2-methyl propane sulfonics sodium/allyl alkyl quaternized copolymer, acrylamide/sodium Acrylate/N- vinylpyridines Pyrrolidone/allyl alkyl quaternized copolymer, acrylamide/sodium Acrylate/SSS/allyl alkyl quaternary ammonium salt Copolymer, acrylamide/sodium Acrylate/vinylsulfonate/allyl alkyl quaternized copolymer and acrylamide/acrylic acid One or more in sodium/acrylamide alkyl sulfonic acid and its co-polymer of sulfonate.

Preferably, described one kind being selected from the mutual exclusive organic solvent of water in diesel oil, kerosene, atoleine and white oil Or it is various.

The preparation method for concentrating thickener is used present invention also offers a kind of above-mentioned Water-In-Oil association type displacement of reservoir oil, including it is following Step：

A) decentralized medium, dispersed phase and compound emulsifying agent are mixed, water-in-oil emulsion is obtained；

B) to hydrophobic associated polymer displacement of reservoir oil thickener is added in the water-in-oil emulsion, mix, obtain oily bag Water association type displacement of reservoir oil concentration thickener.

Preferably, step A) in, the temperature of the mixing is 35~70 DEG C, and the rotating speed of the mixing is 300 ~800rmp, the time of the mixing is 20~60min.

Preferably, step B) in, the mixing temperature is 35~70 DEG C, the rotating speed of the mixing for 600~ 2000rmp, the mixing time is 40~120min.

Present invention also offers a kind of oil displacement agent, including above-mentioned Water-In-Oil association type displacement of reservoir oil concentration thickener or above-mentioned The Water-In-Oil association type displacement of reservoir oil concentration thickener that preparation method is prepared.

Compared with prior art, it is the invention provides a kind of Water-In-Oil association type displacement of reservoir oil concentration thickener including following The component of mass percent：The decentralized medium of 25wt%~50wt%, the decentralized medium is mutual exclusive with water organic molten Agent；The dispersed phase of 18wt%~45wt%, the dispersed phase is water；The hydrophobic associated polymer displacement of reservoir oil of 20wt%~40wt% is used Thickener；The compound emulsifying agent of 2.5wt%~6wt%, the compound emulsifying agent is emulsifying agent that HLB value is 3~7 and HLB value It is the compound emulsifying agent of 8~10 emulsifying agent compounding.Contain in the Water-In-Oil association type displacement of reservoir oil concentration thickener that the present invention is provided Emulsifying agent (surfactant) be that the emulsifying agent of two kinds of different HLB values compounds the compound emulsifying agent to be formed, it can be in the solution Positive cooperativity is produced with water-soluble associative polymeric thickener, and then increased system viscosity, improved system solution performance, enhancing Viscoplasticity etc..Meanwhile, the oil displacement system solution prepared by Water-In-Oil association type displacement of reservoir oil concentration thickener is lived with applying surface Property agent compounding after can further enhance Interpolymer Association dynamic physical cross-linked network intensity, strengthen the heatproof, resistance to of oil displacement system The performance such as salt, anti-shearing.In addition, the preparation method that the present invention is provided is simple to operate, thickener dissolution time substantially shortens, dissolving Efficiency is significantly improved, and solution property is obviously improved, and is largely improve efficiency of construction, is reduced technology difficulty and be produced into This, more effectively ensure that the reasonable utilization of platform.

Brief description of the drawings

Fig. 1 is Water-In-Oil association type displacement of reservoir oil concentration thickener thickening curve prepared by embodiment 1；

Fig. 2 is Water-In-Oil association type displacement of reservoir oil concentration thickener thickening curve prepared by embodiment 2；

Fig. 3 is Water-In-Oil association type displacement of reservoir oil concentration thickener thickening curve prepared by embodiment 3；

Fig. 4 is Water-In-Oil association type displacement of reservoir oil concentration thickener thickening curve prepared by embodiment 4；

Fig. 5 is Water-In-Oil association type displacement of reservoir oil concentration thickener thickening curve prepared by embodiment 5；

Fig. 6 is Water-In-Oil association type displacement of reservoir oil concentration thickener thickening curve prepared by embodiment 6；

Fig. 7 is Water-In-Oil association type displacement of reservoir oil concentration thickener thickening curve prepared by embodiment 7；

Fig. 8 is Water-In-Oil association type displacement of reservoir oil concentration thickener salt resistance curve prepared by embodiment 1；

Fig. 9 is Water-In-Oil association type displacement of reservoir oil concentration thickener salt resistance curve prepared by embodiment 2；

Figure 10 is Water-In-Oil association type displacement of reservoir oil concentration thickener salt resistance curve prepared by embodiment 3；

Figure 11 is Water-In-Oil association type displacement of reservoir oil concentration thickener salt resistance curve prepared by embodiment 4；

Figure 12 is Water-In-Oil association type displacement of reservoir oil concentration thickener salt resistance curve prepared by embodiment 5；

Figure 13 is Water-In-Oil association type displacement of reservoir oil concentration thickener salt resistance curve prepared by embodiment 6；

Figure 14 is Water-In-Oil association type displacement of reservoir oil concentration thickener salt resistance curve prepared by embodiment 7；

Figure 15 is Water-In-Oil association type displacement of reservoir oil concentration thickener temperature resistance curve prepared by embodiment 1；

Figure 16 is Water-In-Oil association type displacement of reservoir oil concentration thickener temperature resistance curve prepared by embodiment 2；

Figure 17 is Water-In-Oil association type displacement of reservoir oil concentration thickener temperature resistance curve prepared by embodiment 3；

Figure 18 is Water-In-Oil association type displacement of reservoir oil concentration thickener temperature resistance curve prepared by embodiment 4；

Figure 19 is Water-In-Oil association type displacement of reservoir oil concentration thickener temperature resistance curve prepared by embodiment 5；

Figure 20 is Water-In-Oil association type displacement of reservoir oil concentration thickener temperature resistance curve prepared by embodiment 6；

Figure 21 is Water-In-Oil association type displacement of reservoir oil concentration thickener temperature resistance curve prepared by embodiment 7；

Figure 22 is Water-In-Oil association type displacement of reservoir oil concentration thickener age stability curve prepared by embodiment 1；

Figure 23 is Water-In-Oil association type displacement of reservoir oil concentration thickener age stability curve prepared by embodiment 2；

Figure 24 is Water-In-Oil association type displacement of reservoir oil concentration thickener age stability curve prepared by embodiment 3；

Figure 25 is Water-In-Oil association type displacement of reservoir oil concentration thickener age stability curve prepared by embodiment 4；

Figure 26 is Water-In-Oil association type displacement of reservoir oil concentration thickener age stability curve prepared by embodiment 5；

Figure 27 is Water-In-Oil association type displacement of reservoir oil concentration thickener age stability curve prepared by embodiment 6；

Figure 28 is Water-In-Oil association type displacement of reservoir oil concentration thickener age stability curve prepared by embodiment 7.

Specific embodiment

The dispersed phase of 18wt%~45wt%, the dispersed phase is water；

The Water-In-Oil association type displacement of reservoir oil that the present invention is provided includes decentralized medium with concentration thickener, and the decentralized medium adds Dosage is 25wt%~50wt%, more preferably preferably 30wt%~45wt%, 35wt%~42wt%.The decentralized medium Be with the mutual exclusive organic solvent of water, it is described that diesel oil, kerosene, atoleine and white are selected from the mutual exclusive organic solvent of water One or more in oil.

The Water-In-Oil association type displacement of reservoir oil that the present invention is provided concentration thickener also includes dispersed phase, and the dispersed phase is water, The addition of the water is 18wt%~45wt%, more preferably preferably 20wt%~40wt%, 25wt%~35wt%.

The Water-In-Oil association type displacement of reservoir oil that the present invention is provided also is increased with concentration thickener including the hydrophobic associated polymer displacement of reservoir oil Thick dose.In the present invention, the hydrophobic associated polymer displacement of reservoir oil thickener takes selected from acrylamide/sodium Acrylate/N- alkyl For acrylamide copolymer, acrylamide/sodium Acrylate/2- acrylamide-2-methyl propane sulfonics sodium/N- alkyl substitution acryloyl Amine copolymer thing, acrylamide/sodium Acrylate/alkyl acrylate copolymer, acrylamide/sodium Acrylate/N- vinyl pyrroles Alkanone/alkyl acrylate copolymer, acrylamide/sodium Acrylate/vinylsulfonate/alkyl acrylate copolymer, third Acrylamide/PAA/2- acrylamide-2-methyl propane sulfonics sodium/alkyl acrylate copolymer, acrylamide/acrylic acid Sodium/SSS/alkyl acrylate copolymer, acrylamide/sodium Acrylate/methacrylate copolymer, Acrylamide/sodium Acrylate/2- acrylamide-2-methyl propane sulfonics sodium/methacrylate copolymer, acrylamide/ PAA/NVP/methacrylate copolymer, acrylamide/sodium Acrylate/styrene sulfonic acid Sodium/methacrylate copolymer, acrylamide/sodium Acrylate/vinylsulfonate/alkyl methacrylate copolymerization Thing, the alkyl acrylate copolymer of acrylamide/sodium Acrylate/fluorine substitution, the first of acrylamide/sodium Acrylate/fluorine substitution Base alkyl acrylate copolymer, acrylamide/sodium Acrylate/allyl alkyl quaternized copolymer, acrylamide/acrylic acid Sodium/2- acrylamide-2-methyl propane sulfonics sodium/allyl alkyl quaternized copolymer, acrylamide/sodium Acrylate/N- ethene Base pyrrolidones/allyl alkyl quaternized copolymer, acrylamide/sodium Acrylate/SSS/allyl alkyl season Ammonium salt copolymer, acrylamide/sodium Acrylate/vinylsulfonate/allyl alkyl quaternized copolymer and acrylamide/the third One or more in olefin(e) acid sodium/acrylamide alkyl sulfonic acid and its co-polymer of sulfonate.

In the present invention, the acrylamide/sodium Acrylate/N- alkyl-substituted acrylamide copolymers, acrylamide/the third Alkyl carbon atoms number is preferred in olefin(e) acid sodium/2- acrylamide-2-methyl propane sulfonics sodium/N- alkyl-substituted acrylamide copolymers It is 6~30.

Acrylamide/sodium Acrylate/the alkyl acrylate copolymer, acrylamide/sodium Acrylate/N- vinylpyridines Pyrrolidone/alkyl acrylate copolymer, acrylamide/sodium Acrylate/vinylsulfonate/alkyl acrylate copolymer, Acrylamide/sodium Acrylate/2- acrylamide-2-methyl propane sulfonics sodium/alkyl acrylate copolymer, acrylamide/propylene Sour sodium/SSS/alkyl acrylate copolymer, acrylamide/sodium Acrylate/alkyl methacrylate copolymerization Thing, acrylamide/sodium Acrylate/2- acrylamide-2-methyl propane sulfonics sodium/methacrylate copolymer, acryloyl Amine/PAA/NVP/methacrylate copolymer, acrylamide/sodium Acrylate/styrene Sodium sulfonate/methacrylate copolymer, acrylamide/sodium Acrylate/vinylsulfonate/alkyl methacrylate Alkyl carbon atoms number is preferably 6~30 in copolymer.

The alkyl acrylate copolymer of the acrylamide/sodium Acrylate/fluorine substitution, acrylamide/sodium Acrylate/fluorine Alkyl carbon atoms number is preferably 6~40, the acrylate of the fluorine substitution in substituted methacrylate copolymer The number of middle fluorine substitution is preferably 4~10.

The acrylamide/sodium Acrylate/allyl alkyl quaternized copolymer, acrylamide/sodium Acrylate/2- propylene Acid amides -2- methyl propane sulfonic acids sodium/allyl alkyl quaternized copolymer, acrylamide/sodium Acrylate/N- ethenyl pyrrolidones Ketone/allyl alkyl quaternized copolymer, acrylamide/sodium Acrylate/SSS/allyl alkyl quaternary ammonium salt copolymerization Alkyl carbon atoms number is preferably 4~25 in thing.

Alkyl carbon atoms in the acrylamide/sodium Acrylate/acrylamide alkyl sulfonic acid and its co-polymer of sulfonate Number is preferably 4~20.

It is furthermore preferred that the hydrophobic associated polymer displacement of reservoir oil is selected from acrylamide/sodium Acrylate/N- dodecanes with thickener Base substituted acrylamide copolymer, acrylamide/sodium Acrylate/2- acrylamide-2-methyl propane sulfonics sodium/N- myristyls take For acrylamide copolymer, acrylamide/sodium Acrylate/acrylic acid myristyl ester copolymer, acrylamide/sodium Acrylate/ NVP/octadecyl acrylate copolymer, acrylamide/sodium Acrylate/vinylsulfonate/acrylic acid Cetyl ester copolymer, acrylamide/sodium Acrylate/2- acrylamide-2-methyl propane sulfonics sodium/aliphatic acrylate Copolymer, acrylamide/sodium Acrylate/SSS/octadecyl acrylate copolymer, acrylamide/acrylic acid Sodium/methacrylic acid myristyl ester copolymer, acrylamide/sodium Acrylate/2- acrylamide-2-methyl propane sulfonics sodium/first Base aliphatic acrylate copolymer, acrylamide/sodium Acrylate/NVP/lauryl Base ester copolymer, acrylamide/sodium Acrylate/SSS/lauryl methacrylate copolymer, acryloyl Amine/PAA/vinylsulfonate/methacrylic acid cetyl ester copolymer, acrylamide/sodium Acrylate/tetrafluoro third Olefin(e) acid octadecyl ester copolymer, acrylamide/sodium Acrylate/trifluoromethyl octadecyl acrylate copolymer, acryloyl Amine/PAA/pi-allyl myristyl quaternized copolymer, acrylamide/sodium Acrylate/2- acrylamide -2- methyl-props Sodium sulfonate/pi-allyl myristyl quaternized copolymer, acrylamide/sodium Acrylate/NVP/pi-allyl ten Eight quaternary ammonium alkyl salt copolymers, acrylamide/sodium Acrylate/SSS/pi-allyl dodecyl quaternized copolymer, Acrylamide/sodium Acrylate/vinylsulfonate/pi-allyl cetyl quaternized copolymer, acrylamide/sodium Acrylate/ 2- acrylamide-2-methyl propane sulfonics sodium/pi-allyl octadecyl quaternized copolymer and acrylamide/sodium Acrylate/propylene One or more of acid amides myristyl sodium sulfonate salt copolymer kind.

In the present invention, the hydrophobic associated polymer displacement of reservoir oil uses 100 mesh sieve net filtrations with thickener dry powder.

The addition of the hydrophobic associated polymer displacement of reservoir oil thickener is 20wt%~40wt%, preferably 25wt%~ 35wt%, more preferably 27wt%~33wt%.

The Water-In-Oil association type displacement of reservoir oil of the present invention also includes compound emulsifying agent, the composite emulsifying with concentration thickener Agent is the compound emulsifying agent of the emulsifying agent that HLB value is 3~7 and the emulsifying agent compounding that HLB value is 8~10.The compound emulsifying agent Addition be 2.5wt%~6wt%, more preferably preferably 3.0wt%~5wt%, 3.2wt%~4.5wt%.

Wherein, the mass ratio of the emulsifying agent that the HLB value is 3~7 emulsifying agent and HLB value is 8~10 is (4~6):(1 ~3), preferably (4.5~5.5)：(1.5~2.5).

The HLB value be 3~7 emulsifying agent be selected from polyglycerol polyricinoleate PGPR, methyl glycol fatty acid ester PGMS, oleic acid Diglycollic amide ODEA, polyethylene glycol dioleic acid ester PEG400DO, paregal O O-3, polyoxyethylene oleic acid ester A-103, polyoxy Ethylene castor oil EL-10, Emulsifier EL-60 EL-12, in propylene glycol block polyether L62 and three Risorex PGIS 22s One or more, preferably three Risorex PGIS 22s, methyl glycol fatty acid ester PGMS, polyethylene glycol dioleic acid ester PEG400DO, paregal O O-3, polyoxyethylene oleic acid ester A-103, Emulsifier EL-60 EL-10 and propylene glycol block polyether One or more in L62；

The emulsifying agent of the HLB value 8~10 is selected from AEO AEO-3, AEO AEO- 4, Emulsifier EL-60 EL-20, Emulsifier EL-60 HEL20, diacetyl tartarate list double glyceride DATEM, stearic acid Polyoxyethylene ester SG-6, laurate APEO LAE-4, paregal O O-5, polyoxyethylene oleic acid ester A-105 and poly- second two One or more in alcohol bilaurate PEG400DL, preferably paregal O O-5, Emulsifier EL-60 EL-20, fat Alcohol APEO AEO-3, laurate APEO LAE-4, diacetyl tartarate list double glyceride DATEM, oleic acid polyoxy One or more in vinyl acetate A-105 and polyethylene glycol bilaurate PEG400DL.

In some specific embodiments of the invention, the compound emulsifying agent is selected from three Risorex PGIS 22s and puts down The compound emulsifying agent that flat plus O O-5 are formed；In other specific embodiments of the invention, the compound emulsifying agent is selected from the third two The compound emulsifying agent that alcohol fatty acid ester PGMS and Emulsifier EL-60 EL-20 is formed；In other specific implementations of the invention In example, the compound emulsifying agent is selected from what polyethylene glycol dioleic acid ester PEG400DO and AEO AEO-3 was formed Compound emulsifying agent；In other specific embodiments of the invention, the compound emulsifying agent is selected from paregal O O-3 and laurate The compound emulsifying agent that APEO LAE-4 is formed；In other specific embodiments of the invention, the compound emulsifying agent choosing From the compound emulsifying agent that polyoxyethylene oleic acid ester A-103 and diacetyl tartarate list double glyceride DATEM is formed；Of the invention In other specific embodiments, the compound emulsifying agent is selected from Emulsifier EL-60 EL-10 and polyoxyethylene oleic acid ester A-105 The compound emulsifying agent of formation；In other specific embodiments of the invention, the compound emulsifying agent is poly- selected from propylene glycol block The compound emulsifying agent that ether L62 and polyethylene glycol bilaurate PEG400DL is formed.

The compound emulsifying agent that the present invention is provided can strengthen system stability, the larger portion of HLB value wherein in compound emulsifying agent Divide and enhance its affinity between water, and two kinds of compound uses of emulsifying agent, the emulsifier molecules in emulsion system are handed over The absorption replaced also is equivalent between the emulsifying agent of nonionic and embedded in the emulsification of nonionic on the surface of emulsion particle Agent molecule, this just greatly strengthen the firmness that emulsifying agent is adsorbed on emulsion particle, along with nonionic surfactant sheet Body has the effect of protection emulsion particle, so as to further increase the stability of emulsion system.

The present invention first mixes decentralized medium, dispersed phase and compound emulsifying agent, obtains water-in-oil emulsion；

Wherein, the temperature of the mixing is 35~70 DEG C, more preferably preferably 40~65 DEG C, 45~60 DEG C；Institute The rotating speed for stating mixing is 300~800rmp, preferably 400~700rmp；The time of the mixing be 20~ 60min。

After obtaining water-in-oil emulsion, to hydrophobic associated polymer displacement of reservoir oil thickener is added in the water-in-oil emulsion, mix Stirring is closed, Water-In-Oil association type displacement of reservoir oil concentration thickener is obtained.

Wherein, the mixing temperature is 35~70 DEG C, more preferably preferably 40~65 DEG C, 45~60 DEG C；It is described The rotating speed of mixing is 600~2000rmp, preferably 800~1500rmp；The mixing time is 40~120min, Preferably 60~100min.

Present invention also offers a kind of oil displacement agent, including the displacement of reservoir oil of Water-In-Oil association type concentration thickener or above-mentioned preparation The Water-In-Oil association type displacement of reservoir oil concentration thickener that method is prepared.

The emulsifying agent (surfactant) contained in the Water-In-Oil association type displacement of reservoir oil concentration thickener that the present invention is provided is two The emulsifying agent of kind different HLB values compounds the compound emulsifying agent to be formed, its can in the solution with water-soluble associative polymeric thickener Positive cooperativity is produced, and then increased system viscosity, improved system solution performance, enhancing viscoplasticity etc..Meanwhile, thickened by concentration The oil displacement system solution that agent is prepared can make Interpolymer Association dynamic physical cross-linked network strong after being compounded with applying surface activating agent Degree is further enhanced, and strengthens the performance such as the heatproof of oil displacement system, salt tolerant, anti-shearing.In addition, the preparation method behaviour that the present invention is provided Make simple, thickener dissolution time substantially shortens, and dissolved efficiency is significantly improved, and solution property is obviously improved, and largely improves Efficiency of construction, technology difficulty and production cost are reduced, more effectively ensure that the reasonable utilization of platform.

For a further understanding of the present invention, the Water-In-Oil association type displacement of reservoir oil provided the present invention with reference to embodiment is with dense Contracting thickener and preparation method thereof is illustrated, and protection scope of the present invention is not limited by the following examples.

Embodiment 1

Water-In-Oil (W/O) the association type displacement of reservoir oil preparation (compound emulsifying agent for concentrating thickener：The isostearic acid of three polyglycereol two Ester+paregal O O-5)

(1) a kind of component of W/O association types displacement of reservoir oil concentration thickener, including following mass percent：

0# diesel oil 35.72%, water 35.72%, with thickener, (hereinafter referred to as " displacement of reservoir oil increases for the hydrophobic associated polymer displacement of reservoir oil Thick dose ") 25%, three Risorex PGIS 22s 2.85%, paregal O O-5 0.71%；

Described displacement of reservoir oil thickener is acrylamide/sodium Acrylate/N- dodecyl substituted acrylamide copolymer, institute The compound emulsifying agent stated is three Risorex PGIS 22s and O-5 (ratios 4:1), preparation process is as follows：

At a temperature of 40 DEG C, it is 5 to control profit mass ratio:5, by 357.2g diesel oil, 357.2g water, the polyglycereol of 28.5g tri- The well mixed emulsification of diisopstearate, 7.1g O-5, stirs the water in oil emulsion that 30min forms stabilization under the rotating speed of 600rmp Liquid, is eventually adding 250g displacement of reservoir oil thickeners, and it is 25% to form uniform and stable mass fraction through the high speed shear of 800rmp W/O association types displacement of reservoir oil concentration thickener.

(2) a kind of component of W/O association types displacement of reservoir oil concentration thickener, including following mass percent：

Kerosene 37.35%, water 30.57%, displacement of reservoir oil thickener 28%, three Risorex PGIS 22s 3.06% are put down Flat plus O O-5 1.02%；

Described displacement of reservoir oil thickener is acrylamide/sodium Acrylate/2- acrylamide-2-methyl propane sulfonics sodium/N- ten Tetraalkyl substituted acrylamide copolymer, described compound emulsifying agent is three Risorex PGIS 22s and O-5 (ratios 3: 1), preparation process is as follows：

At a temperature of 50 DEG C, it is 5.5 to control profit mass ratio:4.5, by 373.5g kerosene, 305.7g water, 30.6g trimerizations The well mixed emulsification of glycerine diisopstearate, 10.2g O-5, stirs the oil bag that 30min forms stabilization under the rotating speed of 600rmp Aqueous emulsion, is eventually adding 280g displacement of reservoir oil thickeners, and forming uniform and stable mass fraction through the high speed shear of 1000rmp is 28% W/O association types displacement of reservoir oil concentration thickener.

(3) a kind of component of W/O association types displacement of reservoir oil concentration thickener, including following mass percent：

Atoleine 33.25%, water 22.17%, displacement of reservoir oil thickener 40%, three Risorex PGIS 22s 3.27%, paregal O O-5 1.31%；

Described displacement of reservoir oil thickener is acrylamide/sodium Acrylate/acrylic acid myristyl ester copolymer, and described answers Co-emulsifier is three Risorex PGIS 22s and O-5 (ratios 5:2), preparation process is as follows：

At a temperature of 60 DEG C, it is 6 to control profit mass ratio:4, by 332.5g atoleines, 221.7g water, 32.7g trimerizations The well mixed emulsification of glycerine diisopstearate, 13.1g O-5, stirs the oil bag that 30min forms stabilization under the rotating speed of 600rmp Aqueous emulsion, is eventually adding 400g displacement of reservoir oil thickeners, and forming uniform and stable mass fraction through the high speed shear of 1200rmp is 40% W/O association types displacement of reservoir oil concentration thickener.

Embodiment 2

(compound emulsifying agent is methyl glycol fatty acid ester for the preparation of Water-In-Oil (W/O) association type displacement of reservoir oil concentration thickener PGMS+ Emulsifier EL-60 EL-20)

0# diesel oil 42.86%, water 28.57%, displacement of reservoir oil thickener 25%, methyl glycol fatty acid ester PGMS 2.14% gathers Oxygen ethylene castor oil EL-20 1.43%；

Described displacement of reservoir oil thickener is acrylamide/sodium Acrylate/NVP/octadecyl base Ester copolymer, described compound emulsifying agent is PGMS and EL-20 (ratios 3:2), preparation process is as follows：

At a temperature of 50 DEG C, it is 6 to control profit mass ratio:4, by 428.6g diesel oil, 285.7g water, 21.4g PGMS, The well mixed emulsifications of 14.3g EL-20, stir the water-in-oil emulsion that 30min forms stabilization under the rotating speed of 600rmp, be eventually adding 250g displacement of reservoir oil thickeners, form the W/O association types that uniform and stable mass fraction is 25% and drive through the high speed shear of 800rmp Oil concentration thickener.

White oil 44.15%, water 23.77%, displacement of reservoir oil thickener 28%, methyl glycol fatty acid ester PGMS 2.38%, polyoxy Ethylene castor oil EL-20 1.70%；

Described displacement of reservoir oil thickener is that acrylamide/sodium Acrylate/vinylsulfonate/aliphatic acrylate is common Polymers, described compound emulsifying agent is PGMS and EL-20 (ratios 7:5), preparation process is as follows：

At a temperature of 50 DEG C, it is 6.5 to control profit mass ratio:3.5, by 441.5g white oils, 237.7g water, 23.8g The well mixed emulsifications of PGMS, 17g EL-20, stir the water-in-oil emulsion that 30min forms stabilization under the rotating speed of 600rmp, finally add Enter 280g displacement of reservoir oil thickeners, the W/O association types that uniform and stable mass fraction is 28% are formed through the high speed shear of 1000rmp Displacement of reservoir oil concentration thickener.

Kerosene 45.79%, water 19.63%, displacement of reservoir oil thickener 30%, methyl glycol fatty acid ester PGMS 2.62%, polyoxy Ethylene castor oil EL-20 1.96%；

Described displacement of reservoir oil thickener is acrylamide/sodium Acrylate/2- acrylamide-2-methyl propane sulfonics sodium/propylene Sour cetyl ester copolymer, described compound emulsifying agent is PGMS and EL-20 (ratios 4:3), preparation process is as follows：

At a temperature of 65 DEG C, it is 7 to control profit mass ratio:3, by 457.9g kerosene, 196.3g water, 26.2g PGMS, The well mixed emulsifications of 19.6g EL-20, stir the water-in-oil emulsion that 30min forms stabilization under the rotating speed of 600rmp, be eventually adding 300g displacement of reservoir oil thickeners, form the W/O association types that uniform and stable mass fraction is 30% and drive through the high speed shear of 1200rmp Oil concentration thickener.

Embodiment 3

(compound emulsifying agent is polyethylene glycol dioleic acid ester for the preparation of Water-In-Oil (W/O) association type displacement of reservoir oil concentration thickener PEG400DO+ AEO AEO-3)

0# diesel oil 38.56%, water 38.56%, displacement of reservoir oil thickener 20%, polyethylene glycol dioleic acid ester PEG400DO 2.16%, AEO AEO-3 0.72%；

Described displacement of reservoir oil thickener is that acrylamide/sodium Acrylate/SSS/octadecyl acrylate is common Polymers, described compound emulsifying agent is PEG400DO and AEO-3 (ratios 3:1), preparation process is as follows：

At a temperature of 50 DEG C, it is 5 to control profit mass ratio:5, by 385.6g diesel oil, 385.6g water, 21.6g The well mixed emulsifications of PEG400DO, 7.2g AEO-3, stir the water-in-oil emulsion that 30min forms stabilization under the rotating speed of 500rmp, 200g displacement of reservoir oil thickeners are eventually adding, the W/O that uniform and stable mass fraction is 20% is formed through the high speed shear of 1000rmp Association type displacement of reservoir oil concentration thickener.

Atoleine 37.69%, water 30.84%, displacement of reservoir oil thickener 28%, polyethylene glycol dioleic acid ester PEG400DO2.43%, AEO AEO-3 1.04%；

Described displacement of reservoir oil thickener is acrylamide/sodium Acrylate/methacrylic acid myristyl ester copolymer, described Compound emulsifying agent be PEG400DO and AEO-3 (ratios 7:3), preparation process is as follows：

At a temperature of 60 DEG C, it is 5.5 to control profit mass ratio:4.5, by 376.9g atoleines, 308.4g water, 24.3g The well mixed emulsifications of PEG400DO, 10.4g AEO-3, stir the water-in-oil emulsion that 30min forms stabilization under the rotating speed of 600rmp, 280g displacement of reservoir oil thickeners are eventually adding, the W/O that uniform and stable mass fraction is 28% is formed through the high speed shear of 1200rmp Association type displacement of reservoir oil concentration thickener.

White oil 36.32%, water 29.72%, displacement of reservoir oil thickener 30%, polyethylene glycol dioleic acid ester PEG400DO 2.64%, AEO AEO-3 1.32%；

Described displacement of reservoir oil thickener is acrylamide/sodium Acrylate/2- acrylamide-2-methyl propane sulfonics sodium/methyl Aliphatic acrylate copolymer, described compound emulsifying agent is PEG400DO and AEO-3 (ratios 2:1), preparation process is such as Under：

At a temperature of 65 DEG C, it is 5.5 to control profit mass ratio:4.5, by 363.2g white oils, 297.2g water, 26.4g The well mixed emulsification of PEG400DO, 13.2gAEO-3, stirs the water-in-oil emulsion that 30min forms stabilization under the rotating speed of 600rmp, 300g displacement of reservoir oil thickeners are eventually adding, the W/O that uniform and stable mass fraction is 30% is formed through the high speed shear of 1500rmp Association type displacement of reservoir oil concentration thickener.

Embodiment 4

(compound emulsifying agent is paregal O O-3+ bays for the preparation of Water-In-Oil (W/O) association type displacement of reservoir oil concentration thickener Sour APEO LAE-4)

0# diesel oil 36.06%, water 36.06%, displacement of reservoir oil thickener 25%, paregal O O-32.16%, laurate polyoxy Vinethene LAE-4 0.72%；

Described displacement of reservoir oil thickener is acrylamide/sodium Acrylate/NVP/methacrylic acid 12 Alkyl ester copolymer, described compound emulsifying agent is O-3 and LAE-4 (ratios 3:1), preparation process is as follows：

At a temperature of 50 DEG C, it is 5 to control profit mass ratio:5, by 360.6g diesel oil, 360.6g water, 21.6g O-3,7.2g The well mixed emulsifications of LAE-4, stir the water-in-oil emulsion that 30min forms stabilization under the rotating speed of 600rmp, be eventually adding 250g drives Oil thickener, the W/O association type displacement of reservoir oils that uniform and stable mass fraction is 25% are formed with dense through the high speed shear of 1000rmp Contracting thickener.

0# diesel oil 37.69%, water 30.84%, displacement of reservoir oil thickener 28%, paregal O O-3 2.43%, laurate gathers Oxygen vinethene LAE-4 1.04%；

Described displacement of reservoir oil thickener is acrylamide/sodium Acrylate/SSS/lauryl base Ester copolymer, described compound emulsifying agent is O-3 and LAE-4 (ratios 7:3), preparation process is as follows：

At a temperature of 50 DEG C, it is 5.5 to control profit mass ratio:4.5, by 376.9g diesel oil, 308.4g water, 24.3gO-3, The well mixed emulsifications of 10.4g LAE-4, stir the water-in-oil emulsion that 30min forms stabilization under the rotating speed of 600rmp, be eventually adding 280g displacement of reservoir oil thickeners, form the W/O association types that uniform and stable mass fraction is 28% and drive through the high speed shear of 1200rmp Oil concentration thickener.

Kerosene 36.62%, water 24.42%, displacement of reservoir oil thickener 35%, paregal O O-3 2.64%, laurate polyoxy Vinethene LAE-4 1.32%；

Described displacement of reservoir oil thickener is acrylamide/sodium Acrylate/vinylsulfonate/methacrylic acid cetyl Ester copolymer, described compound emulsifying agent is O-3 and LAE-4 (ratios 2:1), preparation process is as follows：

At a temperature of 50 DEG C, it is 6 to control profit mass ratio:4, by 366.2g kerosene, 244.2g water, 26.4g O-3, The well mixed emulsifications of 13.2g LAE-4, stir the water-in-oil emulsion that 30min forms stabilization under the rotating speed of 600rmp, be eventually adding 350g displacement of reservoir oil thickeners, form the W/O association types that uniform and stable mass fraction is 35% and drive through the high speed shear of 1500rmp Oil concentration thickener.

Embodiment 5

(compound emulsifying agent is polyoxyethylene oleic acid ester A- for the preparation of Water-In-Oil (W/O) association type displacement of reservoir oil concentration thickener 103+ diacetyl tartarate lists double glyceride DATEM)

0# diesel oil 36.06%, water 36.06%, displacement of reservoir oil thickener 25%, polyoxyethylene oleic acid ester A-103 2.16%, Diacetyl tartarate list double glyceride DATEM 0.72%；

Described displacement of reservoir oil thickener is acrylamide/sodium Acrylate/tetrafluoropropene acid octadecyl ester copolymer, described Compound emulsifying agent be A103 and DATEM (ratios 3:1), preparation process is as follows：

At a temperature of 50 DEG C, it is 5 to control profit mass ratio:5, by 360.6g diesel oil, 360.6g water, 21.6g A103, The well mixed emulsifications of 7.2g DATEM, stir the water-in-oil emulsion that 30min forms stabilization under the rotating speed of 600rmp, be eventually adding 250g displacement of reservoir oil thickeners, form the W/O association types that uniform and stable mass fraction is 25% and drive through the high speed shear of 800rmp Oil concentration thickener.

White oil 37.69%, water 30.84%, displacement of reservoir oil thickener 28%, polyoxyethylene oleic acid ester A-103 2.43% is double Acetyltartaric acid list double glyceride DATEM 1.04%；

Described displacement of reservoir oil thickener is acrylamide/sodium Acrylate/trifluoromethyl octadecyl acrylate copolymer, Described compound emulsifying agent is A103 and DATEM (ratios 7:3), preparation process is as follows：

At a temperature of 50 DEG C, it is 5.5 to control profit mass ratio:4.5, by 376.9g white oils, 308.4g water, 24.3g The well mixed emulsifications of A103,10.4g DATEM, stir the water-in-oil emulsion that 30min forms stabilization, finally under the rotating speed of 600rmp 280g displacement of reservoir oil thickeners are added, forming the W/O that uniform and stable mass fraction is 28% through the high speed shear of 1200rmp associates Type displacement of reservoir oil concentration thickener.

0# diesel oil 39.62%, water 26.42%, displacement of reservoir oil thickener 30%, polyoxyethylene oleic acid ester A-103 2.64%, Diacetyl tartarate list double glyceride DATEM 1.32%；

Described displacement of reservoir oil thickener is acrylamide/sodium Acrylate/pi-allyl myristyl quaternized copolymer, described Compound emulsifying agent be A103 and DATEM (ratios 2:1), preparation process is as follows：

At a temperature of 50 DEG C, it is 6 to control profit mass ratio:4, by 396.2g diesel oil, 264.2g water, 26.4g A103, The well mixed emulsifications of 13.2g DATEM, stir the water-in-oil emulsion that 30min forms stabilization under the rotating speed of 600rmp, be eventually adding 300g displacement of reservoir oil thickeners, form the W/O association types that uniform and stable mass fraction is 30% and drive through the high speed shear of 1500rmp Oil concentration thickener.

Embodiment 6

Water-In-Oil (W/O) association type displacement of reservoir oil preparation (the compound emulsifying agent Emulsifier EL-60 EL-10 for concentrating thickener + polyoxyethylene oleic acid ester A-105)

0# diesel oil 35.72%, water 35.72%, displacement of reservoir oil thickener 25%, Emulsifier EL-60 EL-10 2.85%, Polyoxyethylene oleic acid ester A-105 0.71%；

Described displacement of reservoir oil thickener is acrylamide/sodium Acrylate/2- acrylamide-2-methyl propane sulfonics sodium/allyl Base myristyl quaternized copolymer, described compound emulsifying agent is EL-10 and A-105 (ratios 4:1), preparation process is as follows：

At a temperature of 60 DEG C, it is 5 to control profit mass ratio:5, by 357.2g diesel oil, 357.2g water, 28.5gEL-10, The well mixed emulsifications of 7.1g A-105, stir the water-in-oil emulsion that 30min forms stabilization under the rotating speed of 600rmp, be eventually adding 250g displacement of reservoir oil thickeners, form the W/O association types that uniform and stable mass fraction is 25% and drive through the high speed shear of 800rmp Oil concentration thickener.

Kerosene 37.35%, water 30.57%, displacement of reservoir oil thickener 28%, Emulsifier EL-60 EL-10 3.06%, oil Sour polyoxyethylene ester A-105 1.02%；

Described displacement of reservoir oil thickener is acrylamide/sodium Acrylate/NVP/pi-allyl octadecyl Quaternized copolymer, described compound emulsifying agent is EL-10 and A-105 (ratios 3:1), preparation process is as follows：

At a temperature of 50 DEG C, it is 5.5 to control profit mass ratio:4.5, by 373.5g kerosene, 305.7g water, 30.6g EL- 10th, the well mixed emulsifications of 10.2g A-105, stir the water-in-oil emulsion that 30min forms stabilization under the rotating speed of 600rmp, finally add Enter 280g displacement of reservoir oil thickeners, the W/O association types that uniform and stable mass fraction is 28% are formed through the high speed shear of 1000rmp Displacement of reservoir oil concentration thickener.

Atoleine 39.25%, water 26.17%, displacement of reservoir oil thickener 30%, Emulsifier EL-60 EL-10 3.27%, polyoxyethylene oleic acid ester A-105 1.31%；

Described displacement of reservoir oil thickener is acrylamide/sodium Acrylate/SSS/pi-allyl dodecyl quaternary ammonium Salt copolymer, described compound emulsifying agent is EL-10 and A-105 (ratios 5:2), preparation process is as follows：

At a temperature of 60 DEG C, it is 6 to control profit mass ratio:4, by 392.5g atoleines, 261.7g water, 32.7g EL- 10th, the well mixed emulsifications of 13.1g A-105, stir the water-in-oil emulsion that 30min forms stabilization under the rotating speed of 600rmp, finally add Enter 300g displacement of reservoir oil thickeners, the W/O association types that uniform and stable mass fraction is 30% are formed through the high speed shear of 1500rmp Displacement of reservoir oil concentration thickener.

Embodiment 7

(compound emulsifying agent is propylene glycol block polyether L62 for the preparation of Water-In-Oil (W/O) association type displacement of reservoir oil concentration thickener + polyethylene glycol bilaurate PEG400DL)

Kerosene 35.72%, water 35.72%, displacement of reservoir oil thickener 25%, propylene glycol block polyether L62 2.85%, poly- second Glycol bilaurate PEG400DL 0.71%；

Described displacement of reservoir oil thickener is acrylamide/sodium Acrylate/vinylsulfonate/pi-allyl cetyl quaternary ammonium Salt copolymer, described compound emulsifying agent is L62 and PEG400DL (ratios 4:1), preparation process is as follows：

At a temperature of 60 DEG C, it is 5 to control profit mass ratio:5, by 357.2g kerosene, 357.2g water, 28.5gL62,7.1g The well mixed emulsifications of PEG400DL, stir the water-in-oil emulsion that 30min forms stabilization under the rotating speed of 600rmp, be eventually adding 250g Displacement of reservoir oil thickener, forms the W/O association types displacement of reservoir oil that uniform and stable mass fraction is 25% and uses through the high speed shear of 1000rmp Concentration thickener.

0# diesel oil 37.35%, water 30.57%, displacement of reservoir oil thickener 28%, propylene glycol block polyether L62 3.06% gathers Ethylene glycol bilaurate PEG400DL 1.02%；

Described displacement of reservoir oil thickener is acrylamide/sodium Acrylate/2- acrylamide-2-methyl propane sulfonics sodium/allyl Base octadecyl quaternized copolymer, described compound emulsifying agent is L62 and PEG400DL (ratios 3:1), preparation process is as follows：

At a temperature of 50 DEG C, it is 5.5 to control profit mass ratio:4.5, by 373.5g diesel oil, 305.7g water, 30.6g L62, The well mixed emulsifications of 10.2g PEG400DL, stir the water-in-oil emulsion that 30min forms stabilization under the rotating speed of 600rmp, finally add Enter 280g displacement of reservoir oil thickeners, the W/O association types that uniform and stable mass fraction is 28% are formed through the high speed shear of 1200rmp Displacement of reservoir oil concentration thickener.

0# diesel oil 39.25%, water 26.17%, displacement of reservoir oil thickener 30%, propylene glycol block polyether L62 3.27% gathers Ethylene glycol bilaurate PEG400DL 1.31%；

Described displacement of reservoir oil thickener is acrylamide/sodium Acrylate/acrylamide myristyl sodium sulfonate salt copolymer, Described compound emulsifying agent is L62 and PEG400DL (ratios 5:2), preparation process is as follows：

At a temperature of 60 DEG C, it is 6 to control profit mass ratio:4, by 392.5g diesel oil, 261.7g water, 32.7g L62, The well mixed emulsifications of 13.1g PEG400DL, stir the water-in-oil emulsion that 30min forms stabilization under the rotating speed of 600rmp, finally add Enter 300g displacement of reservoir oil thickeners, the W/O association types that uniform and stable mass fraction is 30% are formed through the high speed shear of 1500rmp Displacement of reservoir oil concentration thickener.

Embodiment 8

The Water-In-Oil association type displacement of reservoir oil prepared by embodiment 1~7 performance for concentrating thickener

1st, stability

Embodiment 1~7 is prepared into Water-In-Oil association type displacement of reservoir oil concentration thickener and is respectively placed in 5 DEG C, 25 DEG C, 40 DEG C Under the conditions of to store and concentrate thickener system after 120d and the phenomenons such as be layered, settle do not occur, concentration thickener system keeps stable, by This explanation, at 5~40 DEG C, the Water-In-Oil association type displacement of reservoir oil concentration thickener stabilization time prepared by the present invention is more than 120d, has good stability.

2nd, dissolubility

It is 45 DEG C in temperature, under constant speed stirrer rotating speed 800rmp, (1), (2), (3) in embodiment 1~7 is prepared The displacement of reservoir oil of Water-In-Oil association type divided with concentration thickener products hydrophobic associated polymer corresponding with its displacement of reservoir oil thickener dry powder Not with the polymer solution that pure water dissolved dilution is 5000mg/L, its dissolution time is determined, hung with glass rod, it is molten with naked-eye observation Liquid is uniform state, and required time is dissolution time during without undissolved particle, and experimental result is as shown in table 1.

From table 1 it follows that the Water-In-Oil association type displacement of reservoir oil concentration thickener products as prepared by embodiment 1~7 Can quickly dissolve, dissolution time is shorter；Without particle in course of dissolution, dissolution time is 4~5min, illustrates prepared by embodiment 1~7 The displacement of reservoir oil of Water-In-Oil association type concentration thickener products can quickly dissolve.And increased by the corresponding hydrophobic associated polymer displacement of reservoir oil Thick dose of dry powder course of dissolution easily produces particle, and required dissolution time is more long, and dissolution time is 25~35min, therefore in dissolving Aspect of performance Water-In-Oil association type displacement of reservoir oil concentration thickener products of the invention have larger advantage, disclosure satisfy that site operation Need.

3rd, tackifying

(1), (2), (3) in embodiment 1~7 are prepared the displacement of reservoir oil of Water-In-Oil association type concentration thickener products and Correspondence hydrophobic associated polymer displacement of reservoir oil thickener dry powder is diluted to the mother liquor of 5000mg/L with pure water respectively, then mother liquor is diluted It is the target liquid of 100mg/L, 300mg/L, 500mg/L, 1000mg/L, 1500mg/L, 2000mg/L, 3000mg/L, at 45 DEG C Under, using DV- III, its viscosity is tested under 7.34s-1 and (rotating speed or selection is adjusted admittedly according to viscosity maxima in whole test process Rotor number), test result is as shown in Fig. 1~7.Fig. 1 is Water-In-Oil association type displacement of reservoir oil concentration thickener prepared by embodiment 1 Thickening curve；Fig. 2 is Water-In-Oil association type displacement of reservoir oil concentration thickener thickening curve prepared by embodiment 2；Fig. 3 is embodiment 3 The Water-In-Oil association type displacement of reservoir oil of preparation viscosifies curve with concentration thickener；Fig. 4 is the Water-In-Oil association type displacement of reservoir oil prepared by embodiment 4 Curve is viscosified with concentration thickener；Fig. 5 is Water-In-Oil association type displacement of reservoir oil concentration thickener thickening curve prepared by embodiment 5； Fig. 6 is Water-In-Oil association type displacement of reservoir oil concentration thickener thickening curve prepared by embodiment 6；Fig. 7 is oil bag prepared by embodiment 7 The displacement of reservoir oil of water association type viscosifies curve with concentration thickener.

By Fig. 1~7 as can be seen that being driven with concentration thickener products and correspondence hydrophobic association type by the displacement of reservoir oil of Water-In-Oil association type The target liquid of oil concentration thickener dry composition is respectively provided with good tackifying, compared to the mesh that lower concentration thickener is prepared Standard liquid tackifying more preferably, this be due in the solution, emulsifying agent in Water-In-Oil association type displacement of reservoir oil concentration thickener can with it is thin Hydrophobic side chain in water association polymer interacts, and forms good polymer/surfactant and interacts, thus Selected emulsifying agent and consumption are imitated with positive coorperativity in the solution with hydrophobic associated polymer during concentration thickener system can be illustrated Should.

4th, salt-resistance

In the NaCl solution concentration range of 0~8000mg/L, the sample of embodiment 1~7 is investigated poly- with corresponding hydrophobic association The concentration of compound dry composition is the polymer solution viscosity of 1500mg/L difference salinities with the Changing Pattern of salinity, its survey Method for testing be 25 DEG C at, using DV- III, 7.34s^-1Viscosity (the root in whole test process of sample under the different salinities of lower test Rotating speed or selection fixed rotor number are adjusted according to viscosity maxima), test result is as shown in Fig. 8~14 and table 1.Fig. 8 is embodiment 1 The Water-In-Oil association type displacement of reservoir oil of preparation concentration thickener salt resistance curve；Fig. 9 is the Water-In-Oil association type displacement of reservoir oil prepared by embodiment 2 With concentration thickener salt resistance curve；Figure 10 is Water-In-Oil association type displacement of reservoir oil concentration thickener salt resistance curve prepared by embodiment 3； Figure 11 is Water-In-Oil association type displacement of reservoir oil concentration thickener salt resistance curve prepared by embodiment 4；Figure 12 is oil prepared by embodiment 5 Bag water association type displacement of reservoir oil concentration thickener salt resistance curve；Figure 13 is Water-In-Oil association type displacement of reservoir oil concentration prepared by embodiment 6 Thickener salt resistance curve；Figure 14 is Water-In-Oil association type displacement of reservoir oil concentration thickener salt resistance curve prepared by embodiment 7.

As can be seen that the sample of embodiment 1~7 and corresponding hydrophobic associated polymer dry composition from Fig. 8~14 and table 1 Concentration is respectively provided with good salt-resistance for the polymer solution of 1500mg/L, after its viscosity all first increases with the increase of salinity Reduce because compared with high salinity electrostatic repulsion between the polymer ions group of partial hydrolysis can on the one hand weakened, point Subchain is shunk, and hydrodynamic volume reduces, and is unfavorable for that viscosity increases；On the other hand increased solution polarity simultaneously compared with high salinity And contact even closer between making hydrophobic grouping, and then promote heat resistance and salt tolerance, solution viscosity is increased, generally speaking, solution Salinity be 8000mg/L when, by the sample preparation of embodiment 1~7 polymer solution viscosity retention ratio more than it is corresponding dredge Water association polymer dry powder, the obvious corresponding hydrophobic associated polymer dry powder of its anti-salt property.

5th, temperature resistance

In 25~65 DEG C of temperature ranges, the sample of embodiment 1~7 is investigated and has distinguished with corresponding hydrophobic associated polymer dry powder The concentration prepared with pure water is the polymer solution viscosity variation with temperature rule of 1500mg/L, and its method of testing is use DV- III, 7.34s^-1At different temperatures test sample viscosity (in whole test process according to viscosity maxima adjust rotating speed or Selection fixed rotor number), test result is as shown in Figure 15~21 and table 1.Figure 15 is that Water-In-Oil association type prepared by embodiment 1 drives Oil concentration thickener temperature resistance curve；Figure 16 is that Water-In-Oil association type displacement of reservoir oil concentration thickener temperature resistance prepared by embodiment 2 is bent Line；Figure 17 is Water-In-Oil association type displacement of reservoir oil concentration thickener temperature resistance curve prepared by embodiment 3；Figure 18 is prepared for embodiment 4 The displacement of reservoir oil of Water-In-Oil association type with concentration thickener temperature resistance curve；Figure 19 is that the Water-In-Oil association type displacement of reservoir oil prepared by embodiment 5 is used Concentration thickener temperature resistance curve；Figure 20 is Water-In-Oil association type displacement of reservoir oil concentration thickener temperature resistance curve prepared by embodiment 6；Figure 21 is Water-In-Oil association type displacement of reservoir oil concentration thickener temperature resistance curve prepared by embodiment 7.

From Figure 15~21 and table 1 as can be seen that at 65 DEG C, polymer concentration be 1500mg/L when, by embodiment 1~ The viscosity retention ratio of 7 Water-In-Oil association type displacement of reservoir oils concentration thickener sample is all higher than the corresponding hydrophobic associated polymer displacement of reservoir oil and uses Thickener dry powder, illustrates compared with correspondence hydrophobic associated polymer dry powder, the sample of embodiment 1~7 has better temperature resistance Property.

6th, ageing stability

At 45 DEG C, in 0~120d time ranges, the sample of embodiment 1~7 has been investigated with corresponding hydrophobic associated polymer The concentration that displacement of reservoir oil thickener dry powder is prepared with pure water respectively is that the polymer solution viscosity of 1500mg/L changes with time feelings Condition, its method of testing is the viscosity of 7.34s-1 test samples under the different time (basis in whole test process using DV- III Viscosity maxima adjusts rotating speed or selection fixed rotor number), experimental result is as shown in Figure 22~28 and table 1.Figure 22 is embodiment 1 The Water-In-Oil association type displacement of reservoir oil of preparation concentration thickener age stability curve；Figure 23 is that Water-In-Oil prepared by embodiment 2 associates Type displacement of reservoir oil concentration thickener age stability curve；Figure 24 is Water-In-Oil association type displacement of reservoir oil concentration thickening prepared by embodiment 3 Agent age stability curve；Figure 25 is Water-In-Oil association type displacement of reservoir oil concentration thickener age stability curve prepared by embodiment 4；Figure 26 is Water-In-Oil association type displacement of reservoir oil concentration thickener age stability curve prepared by embodiment 5；Figure 27 is prepared by embodiment 6 Water-In-Oil association type displacement of reservoir oil concentration thickener age stability curve；Figure 28 is that the Water-In-Oil of preparation prepared by embodiment 7 associates Type displacement of reservoir oil concentration thickener age stability curve.

From Figure 22~28 and table 1, as there are different journeys in the viscosity that standing time increases different polymer solutions The phenomenon for reducing is spent, in 120d, is retained with the viscosity of concentration thickener sample by the Water-In-Oil association type displacement of reservoir oil of embodiment 1~7 Rate is all higher than corresponding hydrophobic associated polymer displacement of reservoir oil thickener dry powder, illustrates compared with correspondence hydrophobic associated polymer dry powder Compared with the sample of embodiment 1~7 has better ageing stability.

The Water-In-Oil association type displacement of reservoir oil of 1 embodiment of table 1~7 concentration thickener and the performance evaluation of correspondence polymer dry powder

Note：" association type displacement of reservoir oil concentration thickener " abbreviation " concentration thickener ", " the hydrophobic associated polymer displacement of reservoir oil in table 1 Use thickener dry powder " it is referred to as " polymer dry powder "

7th, Oil Displacing Capacity

(1), (2), (3) in embodiment 1~7 are prepared the displacement of reservoir oil of Water-In-Oil association type concentration thickener products and Corresponding hydrophobic associated polymer displacement of reservoir oil thickener dry powder is diluted with pure water be formulated as the mother liquor of 5000mg/L respectively, then by mother Liquid is diluted to the target liquid of 1500mg/L, and the water at 45 DEG C in quartzy sandfilling surveys permeability and is about 1000 × 10^-3μm²Back-up sand PipeIn carry out oil displacement experiment investigate target liquid Oil Displacing Capacity.

Experimentation is：

1. saturation, pressure during record saturation are carried out with the displacement velocity of 3m/d with salt solution after sandpack column is vacuumized Difference, permeability, pore volume and porosity are calculated by of poor quality before and after Darcy formula and saturation respectively；

2. the Simulation of Crude Oil of 70mPas is treated that mold exit is anhydrous with identical displacement velocity injection model saturation crude oil Outflow saturation terminates；

3. more than 98% is reached with identical speed displacement simulation crude oil to moisture content with salt solution, then is injected with identical speed The association type displacement of reservoir oil of 0.3PV above-mentioned preparations concentration thickener target liquid continues displacement crude oil, record pressure differential, moisture content, original The change of oil recovery；

4. sequent water flooding is carried out with same speed and reaches more than 98% stopping experiment again to moisture content.

As shown in table 2, the overall recovery factor of embodiment sample is better than correspondence hydrophobic association to experimental result as can be seen from the table The polymer displacement of reservoir oil overall recovery factor of thickener dry powder, illustrates there is the more preferable displacement of reservoir oil by embodiment sample provided by the present invention Efficiency.

The sample Oil Displacing Capacity test result of 2 embodiment of table 1~7

Note：" association type displacement of reservoir oil concentration thickener " abbreviation " concentration thickener ", " the hydrophobic associated polymer displacement of reservoir oil in table 2 Use thickener dry powder " it is referred to as " polymer dry powder "

The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should It is considered as protection scope of the present invention.

Claims

1. a kind of Water-In-Oil association type displacement of reservoir oil is used and concentrates thickener, it is characterised in that the component including following mass percent：

The dispersed phase of 18wt%~45wt%, the dispersed phase is water；

The compound emulsifying agent of 2.5wt%~6wt%, the compound emulsifying agent is 8 for emulsifying agent that HLB value is 3~7 and HLB value The compound emulsifying agent of~10 emulsifying agent compounding.

2. the Water-In-Oil association type displacement of reservoir oil according to claim 1 is used and concentrates thickener, it is characterised in that the HLB value is 3 ~7 emulsifying agent is (4~6) with the mass ratio of the emulsifying agent that HLB value is 8~10:(1~3).

3. the Water-In-Oil association type displacement of reservoir oil according to claim 1 is used and concentrates thickener, it is characterised in that the HLB value is 3 ~7 emulsifying agent is selected from polyglycerol polyricinoleate PGPR, methyl glycol fatty acid ester PGMS, oleic acid diethyl amide ODEA, poly- second Glycol dioleic acid ester PEG400DO, paregal O O-3, polyoxyethylene oleic acid ester A-103, Emulsifier EL-60 EL-10, polyoxy One or more in ethylene castor oil EL-12, propylene glycol block polyether L62 and three Risorex PGIS 22s；

The emulsifying agent of the HLB value 8~10 is：AEO AEO-3, AEO AEO-4, polyoxy Ethylene castor oil EL-20, Emulsifier EL-60 HEL20, diacetyl tartarate list double glyceride DATEM, stearic acid polyoxy second Alkene ester SG-6, laurate APEO LAE-4, paregal O O-5, polyoxyethylene oleic acid ester A-105 and polyethylene glycol are bimonthly One or more in cinnamic acid ester PEG400DL.

4. the Water-In-Oil association type displacement of reservoir oil according to claim 1 is used and concentrates thickener, it is characterised in that the composite emulsifying Agent be selected from the compound emulsifying agent that three Risorex PGIS 22s and paregal O O-5 formed, methyl glycol fatty acid ester PGMS with Compound emulsifying agent, polyethylene glycol dioleic acid ester PEG400DO and aliphatic alcohol polyethenoxy that Emulsifier EL-60 EL-20 is formed Compound emulsifying agent, oil that compound emulsifying agent, paregal O O-3 and the laurate APEO LAE-4 that ether AEO-3 is formed are formed Compound emulsifying agent, Emulsifier EL-60 that sour polyoxyethylene ester A-103 and diacetyl tartarate list double glyceride DATEM is formed Compound emulsifying agent or propylene glycol block polyether L62 and the bimonthly osmanthus of polyethylene glycol that EL-10 and polyoxyethylene oleic acid ester A-105 is formed The compound emulsifying agent that acid esters PEG400DL is formed.

5. the Water-In-Oil association type displacement of reservoir oil according to claim 1 is used and concentrates thickener, it is characterised in that the hydrophobic association Polymer displacement of reservoir oil is selected from acrylamide/sodium Acrylate/N- alkyl-substituted acrylamide copolymers, acrylamide/the third with thickener Olefin(e) acid sodium/2- acrylamide-2-methyl propane sulfonics sodium/N- alkyl-substituted acrylamide copolymers, acrylamide/sodium Acrylate/ Alkyl acrylate copolymer, acrylamide/sodium Acrylate/NVP/alkyl acrylate copolymer, propylene Acid amides/PAA/vinylsulfonate/alkyl acrylate copolymer, acrylamide/sodium Acrylate/2- acrylamides -2- Methyl propane sulfonic acid sodium/alkyl acrylate copolymer, acrylamide/sodium Acrylate/SSS/alkyl acrylate is common Polymers, acrylamide/sodium Acrylate/methacrylate copolymer, acrylamide/sodium Acrylate/2- acrylamides -2- Methyl propane sulfonic acid sodium/methacrylate copolymer, acrylamide/sodium Acrylate/NVP/methyl-prop Olefin(e) acid alkyl ester copolymer, acrylamide/sodium Acrylate/SSS/methacrylate copolymer, acryloyl Amine/PAA/vinylsulfonate/methacrylate copolymer, the third of acrylamide/sodium Acrylate/fluorine substitution Olefin(e) acid alkyl ester copolymer, the methacrylate copolymer of acrylamide/sodium Acrylate/fluorine substitution, acrylamide/the third Olefin(e) acid sodium/allyl alkyl quaternized copolymer, acrylamide/sodium Acrylate/2- acrylamide-2-methyl propane sulfonics sodium/alkene Propyl alkyl quaternized copolymer, acrylamide/sodium Acrylate/NVP/allyl alkyl quaternary ammonium salt copolymerization Thing, acrylamide/sodium Acrylate/SSS/allyl alkyl quaternized copolymer, acrylamide/sodium Acrylate/second AOS/allyl alkyl quaternized copolymer and acrylamide/sodium Acrylate/acrylamide alkyl sulfonic acid and its sulfonic acid One or more in salt copolymer.

6. the Water-In-Oil association type displacement of reservoir oil according to claim 1 is used and concentrates thickener, it is characterised in that described and water is mutual not Compatible organic solvent is selected from one or more in diesel oil, kerosene, atoleine and white oil.

7. a kind of Water-In-Oil association type displacement of reservoir oil use as described in claim 1~6 any one concentrates the preparation method of thickener, It is characterised in that it includes following steps：

B) to hydrophobic associated polymer displacement of reservoir oil thickener is added in the water-in-oil emulsion, mix, obtain Water-In-Oil and form Mould assembly displacement of reservoir oil concentration thickener.

8. preparation method according to claim 7, it is characterised in that step A) in, the temperature of the mixing is 35 ~70 DEG C, the rotating speed of the mixing is 300~800rmp, and the time of the mixing is 20~60min.

9. preparation method according to claim 7, it is characterised in that step B) in, the mixing temperature is 35~ 70 DEG C, the rotating speed of the mixing is 600~2000rmp, and the mixing time is 40~120min.

10. a kind of oil displacement agent, it is characterised in that used including the Water-In-Oil association type displacement of reservoir oil described in claim 1~6 any one The Water-In-Oil association type displacement of reservoir oil concentration that concentration thickener or claim 7~9 any one preparation method are prepared increases Thick dose.