CN106479474A - Shale gas pressure break crosslinkable polymeric linear colloid system and preparation method thereof - Google Patents

Shale gas pressure break crosslinkable polymeric linear colloid system and preparation method thereof Download PDF

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Publication number
CN106479474A
CN106479474A CN201610786816.0A CN201610786816A CN106479474A CN 106479474 A CN106479474 A CN 106479474A CN 201610786816 A CN201610786816 A CN 201610786816A CN 106479474 A CN106479474 A CN 106479474A
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parts
thickening agent
colloid system
shale gas
clay stabilizer
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何伟
王彬
张灵
张红旭
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SICHUAN WELDON CHEMICAL Co Ltd
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SICHUAN WELDON CHEMICAL Co Ltd
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    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/60Compositions for stimulating production by acting on the underground formation
    • C09K8/62Compositions for forming crevices or fractures
    • C09K8/66Compositions based on water or polar solvents
    • C09K8/68Compositions based on water or polar solvents containing organic compounds
    • C09K8/685Compositions based on water or polar solvents containing organic compounds containing cross-linking agents
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/60Compositions for stimulating production by acting on the underground formation
    • C09K8/84Compositions based on water or polar solvents
    • C09K8/86Compositions based on water or polar solvents containing organic compounds
    • C09K8/88Compositions based on water or polar solvents containing organic compounds macromolecular compounds
    • C09K8/887Compositions based on water or polar solvents containing organic compounds macromolecular compounds containing cross-linking agents

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Abstract

The invention discloses a kind of shale gas pressure break crosslinkable polymeric linear colloid system and preparation method thereof, in parts by weight, described polymeric linear colloid system includes 0.3~0.5 part of thickening agent, 0.3~0.5 portion of clay stabilizer, 0.3~0.5 portion of cleanup additive, 0.2~0.3 part of cross-linking agent and 98.2~98.9 parts and returns discharge opeing.Described preparation method includes preparing base fluid step and blend step, takes the discharge opeing of returning of formula ratio, adds thickening agent simultaneously to stir to dissolving, adds clay stabilizer and the cleanup additive of formula ratio, and base fluid standby is obtained after mix homogeneously;In fracturing work, the cross-linking agent of formula ratio is added in described base fluid and obtains described polymeric linear colloid system.The linear gum base liquid that the present invention prepares in returning discharge opeing applies wider low concentration guar gum system to have the characteristics that viscosity is high, cross-linking, frictional resistance is low, sand washing replacement effect is good more at present, has a good application prospect.

Description

Shale gas pressure break crosslinkable polymeric linear colloid system and preparation method thereof
Technical field
The present invention relates to the technical field of shale gas extensive volume fracturing rebuilding construction, more particularly, it is related to one kind Shale gas pressure break crosslinkable polymeric linear colloid system and preparation method thereof.
Background technology
In the fracture technology of current shale gas, the linear fracturing fluid system of employing is low concentration guar gum system. Due to shale gas construction can produce substantial amounts of return discharge opeing, therefore scene is joined liquid water and is substantially used and returns discharge opeing.But, return The salinity of discharge opeing is higher and complex chemical composition, prepares linear gum base liquid according to low concentration guar gum, then hold in returning discharge opeing Easily occur viscous relatively slow or do not played viscous phenomenon, had a strong impact on the sand washing of linear fracturing fluid system and replace effect.
Therefore, it is necessary to provide a kind of using returning discharge opeing preparation and the more excellent crosslinkable polymerization of shale gas pressure break of effect Thing linear colloid system and preparation method thereof.
Content of the invention
Poor in order to solve the problems, such as the linear gum base liquid effect that existing low concentration guar gum is prepared, the purpose of the present invention is to carry For a kind of shale in the linear gum base liquid returning preparation in discharge opeing with the features such as viscosity is high, cross-linking, sand washing replacement effect is good Air pressure splits with crosslinkable polymeric linear colloid system and preparation method thereof.
An aspect of of the present present invention discloses the crosslinkable polymeric linear colloid system of shale gas pressure break, in parts by weight, Described polymeric linear colloid system includes 0.3~0.5 part of thickening agent, 0.3~0.5 part of clay stabilizer, 0.3~0.5 part of row of helping Agent, 0.2~0.3 part of cross-linking agent and 98.2~98.9 parts return discharge opeing,
Described thickening agent is that the preparation process of modified polyacrylamide and described thickening agent is:Protection in noble gases Under, will be soluble in water for acrylamide and add function monomer, it is slowly added dropwise after stirring reaction into persulfate aqueous solution, drip After finishing, reaction obtains thickening agent aqueous solution and obtains thickening agent by after the solidification pelletize of described thickening agent aqueous solution, wherein, described work( Can monomer be one or more of 2- acrylamide-2-methyl propane sulfonic, acrylic acid and dimethyl carbonate;
Described cross-linking agent will stir in slaine addition hot water to dissolving and adding organic ligand reaction to obtain, described Slaine is the mixture of Borax and zirconium oxychloride, and described organic ligand is in citric acid, acetic acid, triethanolamine and glycerol One or more;
Described clay stabilizer is to be added to the water clay stabilizer host and clay stabilizer adjuvant to be uniformly mixing to obtain , described clay stabilizer host is polyquaternary ammonium salt, and described clay stabilizer adjuvant is potassium chloride and/or ammonium chloride;
Cleanup additive host and cleanup additive adjuvant are added to the water and are uniformly mixing to obtain by described cleanup additive, described cleanup additive Host is fluorocarbon surfactant, and described cleanup additive adjuvant is nonionic surfactant;
Described return discharge opeing and return discharge opeing for what shale gas construction area was fetched.
It is used for an embodiment of the crosslinkable polymeric linear colloid system of shale gas pressure break according to the present invention, described thick The molecular weight of agent is 800~12,000,000, and degree of hydrolysis is 5~20%.
According to shale gas pressure break of the present invention one embodiment of crosslinkable polymeric linear colloid system, described thickening agent Preparation process be:Under the protection of noble gases and under 15~20 DEG C of temperature conditionss, in parts by weight, by 20~40 parts Acrylamide is dissolved in 60~80 parts of deionized waters, adds 10~20 parts of function monomers under agitation;While stirring While be slowly added dropwise that the persulfate aqueous solution obtain in 10~20 parts of deionized waters is dissolved in by 0.01~0.03 part of potassium peroxydisulfate, Deca is reacted after 20~30 minutes and is obtained thickening agent aqueous solution in 3~5 hours, described thickening agent aqueous solution is solidified and obtains after pelletize Thickening agent.
According to shale gas pressure break of the present invention one embodiment of crosslinkable polymeric linear colloid system, with weight portion Meter, 10~20 parts of slaines is added in the hot water that 50~60 parts of temperature are 60~80 DEG C and stirs 10~20 minutes, treat metal Salt adds 20~30 parts of organic ligands after being completely dissolved, and obtains described cross-linking agent after continuing reaction 2~4 hours;Wherein, slaine Middle zirconium oxychloride is 1.5~3 with the mass ratio of Borax:1.
According to shale gas pressure break of the present invention one embodiment of crosslinkable polymeric linear colloid system, with weight portion Meter, 10~20 parts of clay stabilizer hosts and 5~10 parts of clay stabilizer adjuvant is added in 70~80 parts of water, stirs 30~60 Minute obtains described clay stabilizer.
According to shale gas pressure break of the present invention one embodiment of crosslinkable polymeric linear colloid system, with weight portion Meter, 10~15 parts of cleanup additive hosts, 5~10 parts of cleanup additive adjuvant is added in 80~90 parts of water, stirring obtains for 30~60 minutes Described cleanup additive.
Another aspect provides the preparation method with crosslinkable polymeric linear colloid system for the shale gas pressure break, Described preparation method includes preparing base fluid step and blend step,
Prepare base fluid:Take the discharge opeing of returning of formula ratio, add thickening agent and stir to dissolving, the clay adding formula ratio is steady Determine agent and cleanup additive, base fluid standby after mix homogeneously, is obtained;
Mixing:In fracturing work, the cross-linking agent of formula ratio is added in described base fluid and obtains described polymeric linear Colloid system.
According to the shale gas pressure break of the present invention preparation method of crosslinkable polymeric linear colloid system, described base fluid viscous Spend for 35~45mpa.s, anti-dilative is 88~92%, surface tension is 26~28mN/m;Described polymeric linear colloid system Crosslinking time is 0.5~2min, and after crosslinking, colloid initial viscosity is 270~295mpa.s.
Compared with prior art, tied up to crosslinkable polymeric linear colloid using the shale gas pressure break of present invention preparation Return the linear gum base liquid prepared in discharge opeing apply wider low concentration guar gum system to have more at present viscosity is high, cross-linking, frictional resistance Low, sand washing replaces the good feature of effect, has a good application prospect.After the every section of construction of shale gas staged fracturing terminates, gesture Substantial amounts of proppant must be left in the wellbore, after heading into the frozen glue after this linear gum base liquid or crosslinking, because its viscosity is higher, The outstanding sand sand washing effect of base fluid and frozen glue is good, effectively can rinse pit shaft it is ensured that wellbore clean and bridging plug are smoothly below safety Set.
Specific embodiment
All features disclosed in this specification, or disclosed all methods or during step, except mutually exclusive Feature and/or step beyond, all can combine by any way.
Any feature disclosed in this specification, unless specifically stated otherwise, all can be equivalent or there is similar purpose by other Alternative features are replaced.I.e., unless specifically stated otherwise, each feature is a series of equivalent or one of similar characteristics example ?.
First shale gas pressure break of the present invention is described in detail with crosslinkable polymeric linear colloid system below.This Bright polymeric linear colloid system includes thickening agent, cross-linking agent, clay stabilizer, cleanup additive and returns discharge opeing, wherein, by being thickened Agent, clay stabilizer, cleanup additive and return discharge opeing composition base fluid crosslinkable polymeric linear is formed by cross-linking agent and this base fluid Colloid system, and it is applied to the operations such as sand washing in shale gas fracturing reform work progress, replacement, well-flushing.This system is returning discharge opeing It is good that the linear gum base liquid of middle preparation has the characteristics that viscosity is high, cross-linking, sand washing replaces effect.
According to the exemplary embodiment of the present invention, in parts by weight, described polymeric linear colloid system includes 0.3~0.5 Part thickening agent, 0.3~0.5 portion of clay stabilizer, 0.3~0.5 portion of cleanup additive, 0.2~0.3 part of cross-linking agent and 98.2~98.9 parts Return discharge opeing,
Specifically, the thickening agent of the present invention is modified polyacrylamide, and the preparation process of this thickening agent is:In noble gases Protection under, will be soluble in water for acrylamide and add function monomer, be slowly added dropwise into persulfate aqueous solution after stirring reaction, After completion of dropping, reaction obtains thickening agent aqueous solution and obtains thickening agent, wherein, function by after the solidification pelletize of thickening agent aqueous solution Monomer is one or more of 2- acrylamide-2-methyl propane sulfonic, acrylic acid and dimethyl carbonate.Preparing above-mentioned thickening During agent, using aqueous solution polymerization and using potassium peroxydisulfate as initiator, it is embedding that acrylamide and functional monomer copolymerization obtain Section copolymer synthesizes such thickening agent.This thickening agent can rise viscous, due to introducing in shale gas fracturing outlet liquid well Functional monomer is modified, and it possesses good salt resistance effect.
According to a preferred embodiment, the preparation process of above-mentioned thickening agent is:Under the protection of noble gases and 15~ Under 20 DEG C of temperature conditionss, in parts by weight, 20~40 parts of acrylamides are dissolved in 60~80 parts of deionized waters, in stirring Under the conditions of add 10~20 parts of function monomers;Stir and be dissolved in 10 while being slowly added dropwise by 0.01~0.03 part of potassium peroxydisulfate The persulfate aqueous solution obtaining in~20 parts of deionized waters, Deca is reacted after 20~30 minutes and is obtained thickening agent water in 3~5 hours Solution, thickening agent aqueous solution is solidified and obtains thickening agent after pelletize.Wherein, above-mentioned noble gases are preferably nitrogen.
The molecular weight of the above-mentioned thickening agent that the present invention prepares is 800~12,000,000, and degree of hydrolysis is 5~20%.
The cross-linking agent of the present invention by slaine add hot water in stir to dissolve and add organic ligand reaction obtain, Wherein, slaine is the mixture of Borax and zirconium oxychloride, and organic ligand is in citric acid, acetic acid, triethanolamine and glycerol One or more.Wherein, slaine and organic ligand react generation organic metal salt at a certain temperature, and final reaction obtains Be organic boron zirconium multiple crosslinking agent.Preferably, in slaine, zirconium oxychloride and the mass ratio of Borax are 1.5~3:1.
Specifically, in parts by weight, 10~20 parts of slaines being added 50~60 parts of temperature is in 60~80 DEG C of hot water And stir 10~20 minutes, add 20~30 parts of organic ligands after slaine is completely dissolved, obtain after continuing reaction 2~4 hours To above-mentioned cross-linking agent.
The clay stabilizer of the present invention is to be added to the water clay stabilizer host and clay stabilizer adjuvant to stir Obtain, wherein, clay stabilizer host is polyquaternary ammonium salt, and clay stabilizer adjuvant is potassium chloride and/or ammonium chloride.Wherein, The host of clay stabilizer and adjuvant pass through compounding generation cooperative effect, can strengthen its preventive effect of expansion.
Specifically, in parts by weight, 10~20 parts of clay stabilizer hosts and 5~10 parts of clay stabilizer adjuvant are added In 70~80 parts of water, stirring obtains above-mentioned clay stabilizer in 30~60 minutes.
Cleanup additive host and cleanup additive adjuvant are added to the water and are uniformly mixing to obtain by the cleanup additive of the present invention, wherein, Cleanup additive host is fluorocarbon surfactant, for example, can be trimerization epoxy HFC-236fa amido propyl betaine, 8-3-9 fluorine The soft bridge of carbon-to-carbon hydrogen mixes the double quaternary ammonium of chain, trimerization epoxy HFC-236fa amide (2- sulfurous acid) ethyl diformazan sodium etc.;Cleanup additive adjuvant is Nonionic surfactant, for example, can be NPE, dodecyl phenol polyethenoxy ether etc..Wherein, the row of helping The host of agent and adjuvant pass through compounding generation cooperative effect, can strengthen its row's of helping effect.
Specifically, in parts by weight, 10~15 parts of cleanup additive hosts, 5~10 parts of cleanup additive adjuvant are added 80~90 parts In water, stirring obtains above-mentioned cleanup additive in 30~60 minutes.
The discharge opeing of returning that the present invention uses returns discharge opeing for what shale gas construction area was fetched.Wherein, returning discharge opeing is shale gas pressure break Return discharge opeing, its complicated component is changeable, central containing substantial amounts of calcium ion, magnesium ion, iron ion, chloride ion, polymer breaking glue solution And other chemical compositions, total salinity about 30000~80000ppm.
The shale gas pressure break that the present invention is obtained ties up to pressure break with crosslinkable polymeric linear colloid and makes in seam, can will be residual Haydite in the wellbore is stayed to rinse and replace in entrance crack, it is to avoid lower downhole tool that is leading to is subject to because sand washing is not clean Resistance, has good using effect.
Next above-mentioned shale gas pressure break is carried out specifically with the preparation method of crosslinkable polymeric linear colloid system Bright.It includes preparing base fluid step and blend step, and wherein, the step preparing base fluid is:Take the discharge opeing of returning of formula ratio, add thick Agent simultaneously stirs to dissolving, adds clay stabilizer and the cleanup additive of formula ratio, and base fluid standby is obtained after mix homogeneously;Mixed Closing step is:In fracturing work, the cross-linking agent of formula ratio is pumped into fracturing blender truck agitator tank and adds in described base fluid, gathered Compound linear glue cross-linking system.
According to one embodiment of present invention, in parts by weight, add 982~989 parts in container to return discharge opeing and open 3~5 parts of thickening agents are subsequently slowly added into return in discharge opeing and stir 30 minutes and dissolve to abundant, add 3~5 parts by stirring Base fluid standby is obtained after clay stabilizer and 3~5 portions of cleanup additives;In fracturing work, add 2~3 parts of crosslinkings in base fluid The polymeric linear glue of the operation such as agent the prepared sand washing that can be used in shale gas fracturing reform work progress, replacement, well-flushing System.
By viscosity being carried out to base fluid and polymeric linear colloid system and the test of cross-linking properties can obtain its main skill Art parameter.Testing scheme is:Take 60ml base fluid, using RS6000 Haake torque rheometer test base fluid in room temperature, 170S-1Under viscous Degree;Take 100ml base fluid and add 0.2~0.3ml cross-linking agent with pipet, test crosslinking time simultaneously adopts RS6000 Haake rheology Instrument test crosslinked gel is in 100 DEG C, 170S-1Under viscosity.
After tested, the shale gas pressure break of the present invention viscosity of base fluid in crosslinkable polymeric linear colloid system be 35~ 45mpa.s, anti-dilative is 88~92%, and surface tension is 26~28mN/m;The crosslinking time of described polymeric linear colloid system For 0.5~2min, after crosslinking, colloid initial viscosity is 270~295mpa.s.
It should be understood that the above-mentioned embodiment of present invention detailed description and following examples are merely to illustrate the present invention rather than limit The scope of the present invention processed, those skilled in the art made according to the above of the present invention some nonessential improve and adjust Whole belong to protection scope of the present invention.In following embodiments, specific parameter etc. is also only one of OK range example, I.e. those skilled in the art can be done in suitable scope by the explanation of this paper and select, and do not really want to be defined in Examples below In concrete numerical value and concrete steps.
In order that the purpose of the present invention, technical scheme and effect are more specific clear, below by the preferred reality to the present invention Apply example to be described in detail.
Embodiment 1:
Under nitrogen protection and under 15 DEG C of temperature conditionss, in parts by weight, 30 parts of acrylamides are dissolved in 50 parts In deionized water, add 10 parts of 2- acrylamide-2-methyl propane sulfonics under agitation;Stir while be slowly added dropwise by 0.01 part of potassium peroxydisulfate is dissolved in the persulfate aqueous solution obtain in 10 parts of deionized waters, and Deca reacts 4 after finishing within 30 minutes Hour obtains thickening agent aqueous solution, thickening agent aqueous solution is solidified and obtains thickening agent after pelletize.
10 parts of zirconium oxychlorides and 5 parts of Boraxs are added to stir in 65 parts of water and is warming up to after 65 DEG C to dissolving, and add 20 The organic boron zirconium multiple crosslinking agent that part triethanolamine obtains after reacting 3h.
10 parts of polyquaternary ammonium salt and 10 parts of potassium chloride are added in 80 parts of water, stirring obtains clay stabilizer in 60 minutes.
10 parts of trimerization epoxy HFC-236fa amido propyl betaines and 5 parts of NPEs are added 85 parts of water In, stirring obtains clay stabilizer in 30 minutes.
98.9 parts are returned discharge opeing, 0.3 portion of above-mentioned thickening agent, 0.3 portion of above-mentioned clay stabilizer, 0.3 portion of above-mentioned cleanup additive are joined Base fluid processed, then add 0.2 part of above-mentioned cross-linking agent to carry out being cross-linked to form frozen glue in this base fluid.Base fluid in the present embodiment and frozen glue Technical parameter such as table 1 below.
The technical parameter of base fluid and frozen glue in table 1 embodiment 1
Embodiment 2:
Under nitrogen protection and under 18 DEG C of temperature conditionss, in parts by weight, 40 parts of acrylamides are dissolved in 40 parts In deionized water, add 10 parts of acrylic acid under agitation;Stir while being slowly added dropwise molten by 0.015 part of potassium peroxydisulfate The persulfate aqueous solution that solution obtains in 10 parts of deionized waters, reaction after Deca finishes for 30 minutes obtains thickening agent water in 4 hours Solution, thickening agent aqueous solution is solidified and obtains thickening agent after pelletize.
12 parts of zirconium oxychlorides and 8 parts of Boraxs are added to stir in 60 parts of water and is warming up to after 65 DEG C to dissolving, and add 20 The organic boron zirconium multiple crosslinking agent obtaining after part citric acid reactions 3h.
10 parts of polyquaternary ammonium salt and 10 parts of potassium chloride are added in 80 parts of water, stirring obtains clay stabilizer in 60 minutes.
12 parts of soft mixed double quaternary ammoniums of chain of bridge of 8-3-9 fluorine carbon-to-carbon hydrogen and 3 parts of dodecyl phenol polyethenoxy ethers are added 85 parts of water In, stirring obtains clay stabilizer in 30 minutes.
98.4 parts are returned discharge opeing, 0.3 portion of above-mentioned thickening agent, 0.5 portion of above-mentioned clay stabilizer, 0.5 portion of above-mentioned cleanup additive are joined Base fluid processed, then add 0.3 part of above-mentioned cross-linking agent to carry out being cross-linked to form frozen glue in this base fluid.Base fluid in the present embodiment and frozen glue Technical parameter such as table 2 below.
The technical parameter of base fluid and frozen glue in table 2 embodiment 2
Embodiment 3:
Under nitrogen protection and under 20 DEG C of temperature conditionss, in parts by weight, 35 parts of acrylamides are dissolved in 40 parts In deionized water, add 15 parts of dimethyl carbonate under agitation;Stir while being slowly added dropwise by 0.02 part of persulfuric acid Potassium is dissolved in the persulfate aqueous solution obtain in 10 parts of deionized waters, and Deca is reacted after finishing within 30 minutes and is thickened for 4 hours Agent aqueous solution, thickening agent aqueous solution is solidified and obtains thickening agent after pelletize.
15 parts of zirconium oxychlorides and 5 parts of Boraxs are added to stir in 60 parts of water and is warming up to after 65 DEG C to dissolving, and add 20 The organic boron zirconium multiple crosslinking agent that part glycerol obtains after reacting 3h.
10 parts of polyquaternary ammonium salt and 10 parts of ammonium chloride are added in 80 parts of water, stirring obtains clay stabilizer in 60 minutes.
10 parts of trimerization epoxy HFC-236fa amide (2- sulfurous acid) ethyl diformazan sodium and 5 parts of NPEs are added Enter in 85 parts of water, stirring obtains clay stabilizer in 30 minutes.
98.4 parts are returned discharge opeing, 0.5 portion of above-mentioned thickening agent, 0.3 portion of above-mentioned clay stabilizer, 0.5 portion of above-mentioned cleanup additive are joined Base fluid processed, then add 0.3 part of above-mentioned cross-linking agent to carry out being cross-linked to form frozen glue in this base fluid.Base fluid in the present embodiment and frozen glue Technical parameter such as table 3 below.
The technical parameter of base fluid and frozen glue in table 3 embodiment 3
In sum, tied up to crosslinkable polymeric linear colloid using the shale gas pressure break of present invention preparation and return discharge opeing The linear gum base liquid of middle preparation applies wider low concentration guar gum system to have more at present, and viscosity is high, cross-linking, frictional resistance is low, sand washing Replace the good feature of effect, have a good application prospect.After the every section of construction of shale gas staged fracturing terminates, will certainly be in well Substantial amounts of proppant is left in cylinder, after heading into the frozen glue after this linear gum base liquid or crosslinking, because its viscosity is higher, base fluid and jelly The outstanding sand sand washing effect of glue is good, effectively can rinse pit shaft it is ensured that wellbore clean and bridging plug smoothly set below safety.
The invention is not limited in aforesaid specific embodiment.The present invention expands to and any discloses in this manual New feature or any new combination, and the arbitrary new method of disclosure or the step of process or any new combination.

Claims (8)

1. a kind of shale gas pressure break with crosslinkable polymeric linear colloid system it is characterised in that in parts by weight, described polymerization Thing linear colloid system include 0.3~0.5 part of thickening agent, 0.3~0.5 portion of clay stabilizer, 0.3~0.5 portion of cleanup additive, 0.2~ 0.3 part of cross-linking agent and 98.2~98.9 parts return discharge opeing,
Described thickening agent is that the preparation process of modified polyacrylamide and described thickening agent is:Under the protection of noble gases, Will be soluble in water for acrylamide and add function monomer, it is slowly added dropwise after stirring reaction into persulfate aqueous solution, completion of dropping Reaction obtains thickening agent aqueous solution and obtains thickening agent by after the solidification pelletize of described thickening agent aqueous solution afterwards, wherein, described function Monomer is one or more of 2- acrylamide-2-methyl propane sulfonic, acrylic acid and dimethyl carbonate;
Described cross-linking agent by slaine add hot water in stir to dissolve and add organic ligand reaction obtain, described metal Salt is the mixture of Borax and zirconium oxychloride, and described organic ligand is one of citric acid, acetic acid, triethanolamine and glycerol Or it is multiple;
Clay stabilizer host and clay stabilizer adjuvant are added to the water and are uniformly mixing to obtain by described clay stabilizer, institute Stating clay stabilizer host is polyquaternary ammonium salt, and described clay stabilizer adjuvant is potassium chloride and/or ammonium chloride;
Cleanup additive host and cleanup additive adjuvant are added to the water and are uniformly mixing to obtain by described cleanup additive, described cleanup additive host For fluorocarbon surfactant, described cleanup additive adjuvant is nonionic surfactant;
Described return discharge opeing and return discharge opeing for what shale gas construction area was fetched.
2. according to claim 1 for shale gas pressure break with crosslinkable polymeric linear colloid system it is characterised in that The molecular weight of described thickening agent is 800~12,000,000, and degree of hydrolysis is 5~20%.
3. according to claim 2 shale gas pressure break with crosslinkable polymeric linear colloid system it is characterised in that described thick The preparation process of agent is:Under the protection of noble gases and under 15~20 DEG C of temperature conditionss, in parts by weight, by 20~ 40 parts of acrylamides are dissolved in 60~80 parts of deionized waters, add 10~20 parts of function monomers under agitation;While stirring Mix, while being slowly added dropwise, the potassium peroxydisulfate water obtain in 10~20 parts of deionized waters is dissolved in by 0.01~0.03 part of potassium peroxydisulfate Solution, Deca is reacted after 20~30 minutes and is obtained thickening agent aqueous solution in 3~5 hours, and described thickening agent aqueous solution is solidified pelletize After obtain thickening agent.
4. according to claim 1 shale gas pressure break with crosslinkable polymeric linear colloid system it is characterised in that with weight Part meter, 10~20 parts of slaines is added in the hot water that 50~60 parts of temperature are 60~80 DEG C and stirs 10~20 minutes, treat gold Belong to after salt is completely dissolved and add 20~30 parts of organic ligands, after continuing reaction 2~4 hours, obtain described cross-linking agent;Wherein, metal In salt, zirconium oxychloride and the mass ratio of Borax are 1.5~3:1.
5. according to claim 1 shale gas pressure break with crosslinkable polymeric linear colloid system it is characterised in that with weight Part meter, 10~20 parts of clay stabilizer hosts and 5~10 parts of clay stabilizer adjuvant are added in 70~80 parts of water, and stirring 30~ Obtain described clay stabilizer within 60 minutes.
6. according to claim 1 shale gas pressure break with crosslinkable polymeric linear colloid system it is characterised in that with weight Part meter, 10~15 parts of cleanup additive hosts, 5~10 parts of cleanup additive adjuvant is added in 80~90 parts of water, stirring obtains for 30~60 minutes To described cleanup additive.
7. the preparation method of crosslinkable polymeric linear colloid system of shale gas pressure break described in claim 1 to 6, its feature It is, described preparation method includes preparing base fluid step and blend step,
Prepare base fluid:Take the discharge opeing of returning of formula ratio, add thickening agent and stir to dissolving, add the clay stabilizer of formula ratio And cleanup additive, base fluid standby is obtained after mix homogeneously;
Mixing:In fracturing work, the cross-linking agent of formula ratio is added in described base fluid and obtains described polymeric linear colloid System.
8. the shale gas pressure break preparation method of crosslinkable polymeric linear colloid system according to claim 7, its feature It is, the viscosity of described base fluid is 35~45mpa.s, and anti-dilative is 88~92%, and surface tension is 26~28mN/m;Described poly- The crosslinking time of compound linear colloid system is 0.5~2min, and after crosslinking, colloid initial viscosity is 270~295mpa.s.
CN201610786816.0A 2016-08-31 2016-08-31 Shale gas pressure break crosslinkable polymeric linear colloid system and preparation method thereof Pending CN106479474A (en)

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN111171800A (en) * 2018-11-13 2020-05-19 中国石油化工股份有限公司 Preparation method of crosslinked acid

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101633839A (en) * 2009-08-28 2010-01-27 大庆油田有限责任公司 200-DEG C super-high temperature fracturing fluid
CN101993688A (en) * 2009-08-24 2011-03-30 中国石油天然气股份有限公司 Low damage fracturing fluid system
CN102337113A (en) * 2011-07-21 2012-02-01 陕西科技大学 Method for preparing high temperature retarding-type organic boron zirconium cross linking agent
CN102838781A (en) * 2012-09-11 2012-12-26 中国石油天然气股份有限公司 Ultrahigh-temperature organic zirconium cross-linking agent suitable for polymer cross-linking and fracturing fluid prepared from ultrahigh-temperature organic zirconium cross-linking agent
CN103436245A (en) * 2013-08-22 2013-12-11 中国石油集团川庆钻探工程有限公司 Synthetic polymer fracturing fluid for fracturing
CN103805158A (en) * 2012-11-09 2014-05-21 中国石油化工股份有限公司 Cross-linked acid acidizing fracturing fluid, preparation method and application thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101993688A (en) * 2009-08-24 2011-03-30 中国石油天然气股份有限公司 Low damage fracturing fluid system
CN101633839A (en) * 2009-08-28 2010-01-27 大庆油田有限责任公司 200-DEG C super-high temperature fracturing fluid
CN102337113A (en) * 2011-07-21 2012-02-01 陕西科技大学 Method for preparing high temperature retarding-type organic boron zirconium cross linking agent
CN102838781A (en) * 2012-09-11 2012-12-26 中国石油天然气股份有限公司 Ultrahigh-temperature organic zirconium cross-linking agent suitable for polymer cross-linking and fracturing fluid prepared from ultrahigh-temperature organic zirconium cross-linking agent
CN103805158A (en) * 2012-11-09 2014-05-21 中国石油化工股份有限公司 Cross-linked acid acidizing fracturing fluid, preparation method and application thereof
CN103436245A (en) * 2013-08-22 2013-12-11 中国石油集团川庆钻探工程有限公司 Synthetic polymer fracturing fluid for fracturing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111171800A (en) * 2018-11-13 2020-05-19 中国石油化工股份有限公司 Preparation method of crosslinked acid

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