CN111704389A - Nano channeling-preventing agent, preparation method thereof and channeling-preventing cement slurry - Google Patents
Nano channeling-preventing agent, preparation method thereof and channeling-preventing cement slurry Download PDFInfo
- Publication number
- CN111704389A CN111704389A CN202010633189.3A CN202010633189A CN111704389A CN 111704389 A CN111704389 A CN 111704389A CN 202010633189 A CN202010633189 A CN 202010633189A CN 111704389 A CN111704389 A CN 111704389A
- Authority
- CN
- China
- Prior art keywords
- channeling
- agent
- nano
- weight
- parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/46—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement
- C09K8/467—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement containing additives for specific purposes
- C09K8/493—Additives for reducing or preventing gas migration
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00008—Obtaining or using nanotechnology related materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides a nano channeling-preventing agent, which is prepared from the following components in parts by weight: 20-40 parts of nano silicon dioxide; 5-10 parts of nano silicon; 100 parts by weight of water; 5-15 parts by weight of a coupling agent; 0.5-2 parts by weight of a first dispersant; 0.5-1 part by weight of a first defoaming agent. Compared with the prior art, the nano anti-channeling agent provided by the invention is nano emulsion, and can effectively solve the problem of volume shrinkage caused in the cement paste curing process by adding the nano emulsion into the cement paste, so that the elastic toughness of the set cement and the bonding strength between the set cement and an I, II interface are enhanced, and meanwhile, nano particles can improve the microstructure of the set cement and improve the seepage resistance of the set cement; the nanometer anti-channeling agent has a high specific surface area, can effectively bind free water among pores of cement solid particles, enables cement paste to keep good stability, reduces the permeability of set cement, and improves the strength of the set cement.
Description
Technical Field
The invention belongs to the technical field of petroleum drilling, and particularly relates to a nano channeling-preventing agent, a preparation method thereof and channeling-preventing cement slurry.
Background
The main purposes of oil well cementing are to seal and separate oil, gas and water layers, protect production layers and reinforce well walls, and after cementing, a cementing body formed by a casing, a cement sheath and a stratum serves as a cementing barrier to guarantee the integrity of a well bore of an oil well.
Along with the development of an oil drilling technology, a large-displacement horizontal well is widely applied to oil and gas exploitation, a certain temperature difference can occur at the top and the bottom of a well cementation section due to a long sealing section of a large-displacement horizontal well cementation, and thickening time and strength development during cement paste coagulation waiting periods are inconsistent at different temperatures, so that the well cementation quality is poor. Particularly, in the process of well cementation of a gas well, thickening time of cement paste in a setting period is inconsistent, an ultra-retarding phenomenon occurs, and gas channeling easily occurs, so that the integrity of a shaft is invalid, and the well cementation quality is influenced by annular pressure.
At present, a foam cement slurry system, an expansion cement slurry system and a polymer latex cement slurry system developed abroad are applied to well cementation and tunnel engineering, particularly, the polymer latex cement slurry system is called as an optimal gas channeling prevention cement slurry system since the application of 1958, and can effectively control gas channeling. However, the existing cement paste system usually adopts latex as a main anti-channeling means, the latex addition is insufficient due to the strong sensitivity of the latex anti-channeling cement paste, the problem of gas channeling cannot be well solved, and the requirement of field actual production cannot be met.
The Chinese patent with publication number CN105238376 discloses an elastic anti-channeling cement slurry which has stable performance, and mainly introduces an elastic material on the basis of a latex anti-channeling cement slurry system, thereby preventing the cement from having brittleness, and preventing gas channeling caused by insufficient anti-channeling capacity due to microcracks generated by cracking of the cement during the subsequent pilot production operation processes of perforation, large-scale fracturing and the like of an oil-gas well. The elastic channeling-preventing cement slurry system is low in water loss, has strong gas channeling preventing capacity and water invasion resisting capacity, is low in Young modulus, high in tensile strength, high in cementing strength and slightly expanded in volume, can improve the cementing quality problem of a well cementation two-interface, can effectively inhibit a high-pressure oil-gas layer and an active water layer, avoids oil-gas water channeling, and effectively solves the technical problem of well cementation of a complex well with serious oil, gas and water channeling.
Chinese patent publication No. CN102618231 discloses a low-temperature shallow layer channeling-preventing cement slurry, which is composed of the following components in percentage by mass: 0.05 to 1 percent of triisopropanolamine; 1 to 5 percent of calcium chloride; 1 to 8 percent of vinyl acetate emulsion; 2-20% of butylbenzene emulsion; 1-5% of organic silicone oil defoaming agent; the balance being water. The cement paste has the use temperature of 10-60 ℃, can accelerate the hydration speed of oil well cement, shorten the transition time, improve the structure of an interface transition layer, improve the quality of a mud cake, improve the bonding strength of the interface and the elastic deformation capacity of a cement sheath, solve the continuous occurrence of complex accidents such as outburst and the like after low-temperature shallow well cementing, ensure the smooth development of the low-temperature shallow well, improve the oil-gas productivity and prolong the service life of the oil-gas well.
Chinese patent with publication number CN105038745 discloses a novel liquid silicon channeling-preventing cement slurry for well cementation, and liquid silicon used in the cement slurry system enables the cement slurry to have low water loss, good stability, short static gelation transition time and strong gas channeling prevention capability; the cement paste has the advantages of fast development of early strength at low temperature, acid medium corrosion resistance, micro-expansion after the cement paste is dried, small porosity, high compactness and low permeability.
Chinese patent publication No. CN107129796 discloses a composite anti-channeling agent, a channeling-preventing cement slurry for well cementation and a preparation method thereof, which points out that under the condition of ultra-high temperature, the temperature far exceeds the vitrification temperature of latex, the physical properties of the film formed on the two interfaces of latex are poor, when the cement slurry is in 'weightlessness', the gas channeling cannot be effectively inhibited, and the well cementation quality of the latex cement slurry system is often not ideal. The invention provides a composite anti-channeling agent for well cementing cement slurry, which comprises nano-silica anti-channeling emulsion and well cementing latex, wherein the particle size distribution of nano-silica particles in the nano-silica anti-channeling emulsion is in the range of 9nm and 310nm, the average particle size is in the range of 80nm to 120nm, and nano-scale hard ball nano-silica particles and deformable soft ball latex particles can be filled among cement particles, so that the anti-channeling capacity of the cement slurry under the ultrahigh temperature condition is improved.
However, the solid content of the liquid latex used in the existing anti-channeling cement slurry can only be about 50%, the solid content of the polymer latex powder can often reach more than 95%, if the addition of the latex anti-channeling agent is not enough, the problem of gas channeling can not be well solved, if a corresponding anti-channeling effect needs to be achieved, the addition of the liquid latex needs to be increased, the compressive strength of the set cement can be reduced, the density, the fluidity and the thickening time of the cement slurry can fluctuate, and the requirements of on-site actual production can not be met.
Disclosure of Invention
In view of the above, the technical problem to be solved by the present invention is to provide a nano channeling-preventing agent, a preparation method thereof, and a channeling-preventing cement slurry, wherein the nano channeling-preventing agent is an emulsion and has a high specific surface area.
The invention provides a nano channeling-preventing agent, which is prepared from the following components in parts by weight:
preferably, the particle size of the nano silicon dioxide is 100-300 nm; the particle size of the nano silicon is 150-350 nm.
Preferably, the coupling agent is selected from one or more of a complex coupling agent, a silane coupling agent and a titanate coupling agent; the first dispersant is selected from aldehyde ketone condensate dispersant and/or naphthalene dispersant; the first defoaming agent is selected from one or more of emulsified silicone oil, a higher alcohol fatty acid ester compound, polyoxypropylene glycerol ether and polydimethylsiloxane.
The invention also provides a preparation method of the nano channeling-preventing agent, which is characterized by comprising the following steps:
s1) mixing and stirring water and the first dispersing agent, then adding nano silicon dioxide and nano silicon, and dispersing and stirring to obtain mixed slurry;
s2) mixing and stirring the mixed slurry, the coupling agent and the first defoaming agent to obtain the nano anti-channeling agent.
Preferably, the rotation speed of mixing and stirring in the step S1) is 500-1500 r/min; mixing and stirring for 5-15 min; the rotating speed of the dispersion stirring is 1500-2500 r/min; the time for dispersing and stirring is 10-20 min.
Preferably, in the step S2), the mixed slurry and the coupling agent are mixed and stirred, and then the antifoaming agent is added and stirred to obtain the nano anti-channeling agent; the rotation speed of the mixing and stirring is 1500-2500 r/min; mixing and stirring for 5-15 min; the stirring speed is 1500-2500 r/min; the stirring time is 5-15 min.
The invention also provides anti-channeling cement slurry, which comprises the following components:
preferably, the retarder is selected from one or more of citric acid, boric acid and lignosulfonate; the second defoaming agent is selected from one or more of emulsified silicone oil, a higher alcohol fatty acid ester compound, polyoxypropylene glycerol ether and polydimethylsiloxane; the filler is selected from one or more of fly ash, slag and micro silicon powder; the second dispersant is selected from aldehyde ketone condensate dispersant and/or naphthalene dispersant; the fluid loss agent is selected from acrylamide-sodium acrylate copolymer and/or acrylamide-AMPS copolymer; the lightening agent is selected from floating beads and/or silica fume; the weighting agent is selected from one or more of iron ore powder, barite and manganese ore powder.
Preferably, the density of the anti-channeling cement slurry is 1.50-2.50 g/cm3。
Preferably, the method comprises the following steps:
the invention provides a nano channeling-preventing agent, which is prepared from the following components in parts by weight: 20-40 parts of nano silicon dioxide; 5-10 parts of nano silicon; 100 parts by weight of water; 5-15 parts by weight of a coupling agent; 0.5-2 parts by weight of a first dispersant; 0.5-1 part by weight of a first defoaming agent. Compared with the prior art, the nano anti-channeling agent provided by the invention is nano emulsion, and can effectively solve the problem of volume shrinkage caused in the cement paste curing process by adding the nano emulsion into the cement paste, so that the elastic toughness of the set cement and the bonding strength between the set cement and an I, II interface are enhanced, meanwhile, nano particles can improve the microstructure of the set cement, the seepage resistance of the set cement is improved, and the problems of poor channeling-preventing effect, sealing failure and the like of the cement paste can be effectively solved; the nano anti-channeling agent has a high specific surface area, can effectively bind free water among pores of cement solid particles, enables cement paste to keep good stability, reduces the permeability of set cement, and improves the strength of the set cement; in addition, the nano-scale crystal particles in the nano anti-channeling agent have higher activity in an alkaline environment, can promote the hydration of cement particles, improve the development rate of the gel strength of the set cement, promote the rapid formation of C-S-H gel, further remarkably improve the strength-starting time of the set cement, effectively improve the development of the early strength of the set cement, increase the early strength of the set cement, and further realize the early strength and channeling prevention effects of cement paste.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a nano channeling-preventing agent, which is prepared from the following components in parts by weight:
wherein the content of the nano silicon dioxide is preferably 20 to 35 parts by weight, more preferably 25 to 30 parts by weight, and still more preferably 25 parts by weight; the particle size of the nano silicon dioxide is preferably 100-300 nm, more preferably 100-250 nm, further preferably 150-200 nm, and most preferably 150 nm.
The content of the nano silicon is preferably 5-8 parts by weight, more preferably 6-7 parts by weight, and still more preferably 6 parts by weight; the particle size of the nano silicon is preferably 150-350 nm, more preferably 150-300 nm, still more preferably 200-250 nm, and most preferably 200 nm.
The water used in the nano channeling-preventing agent provided by the invention is preferably distilled water.
According to the invention, the content of the coupling agent in the nano anti-channeling agent is preferably 6-12 parts by weight, more preferably 8-10 parts by weight, and still more preferably 8 parts by weight; the coupling agent is preferably one or more of a complex coupling agent, a silane coupling agent and a titanate coupling agent; the complex coupling agent is preferably a chromium chloride methacrylic acid complex; the silane coupling agent is preferably vinyl triethoxysilane; the titanate coupling agent is preferably isopropyl triisostearoyl titanate.
The content of the first dispersant is preferably 0.5-1.5 parts by weight, more preferably 0.5-1 part by weight, and still more preferably 0.5 part by weight; the first dispersant is preferably an aldehyde-ketone condensate dispersant and/or a naphthalene dispersant.
The content of the first defoaming agent is preferably 0.5 to 0.8 part by weight, more preferably 0.5 to 0.6 part by weight, and still more preferably 0.5 part by weight; the first defoaming agent is preferably one or more of emulsified silicone oil, a higher alcohol fatty acid ester compound, polyoxypropylene glycerol ether and polydimethylsiloxane.
The nano-scale channeling-preventing agent provided by the invention is preferably milky white suspension; the density of the nano-scale channeling-preventing agent is preferably 1.20-1.25 g/cm3。
The nano anti-channeling agent provided by the invention is nano emulsion, and can effectively make up the problem of volume shrinkage caused in the cement slurry curing process by adding the nano emulsion into the cement slurry, enhance the elastic toughness of the set cement and the bonding strength between the set cement and an I, II interface, improve the microstructure of the set cement by nano particles, improve the seepage resistance of the set cement, and effectively solve the problems of poor channeling prevention effect, sealing failure and the like of the cement slurry; the nano anti-channeling agent has a high specific surface area, can effectively bind free water among pores of cement solid particles, enables cement paste to keep good stability, reduces the permeability of set cement, and improves the strength of the set cement; in addition, the nano-scale crystal particles in the nano anti-channeling agent have higher activity in an alkaline environment, can promote the hydration of cement particles, improve the development rate of the gel strength of the set cement, promote the rapid formation of C-S-H gel, further remarkably improve the strength-starting time of the set cement, effectively improve the development of the early strength of the set cement, increase the early strength of the set cement, and further realize the early strength and channeling prevention effects of cement paste.
The invention also provides a preparation method of the nano channeling-preventing agent, which comprises the following steps: s1) mixing and stirring water and the first dispersing agent, then adding nano silicon dioxide and nano silicon, and dispersing and stirring to obtain mixed slurry; s2) mixing and stirring the mixed slurry, the coupling agent and the first defoaming agent to obtain the nano anti-channeling agent.
The sources of all raw materials are not particularly limited and are commercially available, wherein the water, the first dispersant, the nano-silica, the nano-silicon, the coupling agent and the first defoaming agent are the same as those described above, and are not described herein again.
Mixing and stirring water and the first dispersant; the mixing and stirring speed is preferably 500-1500 r/min, more preferably 800-1200 r/min, and still more preferably 1000 r/min; the mixing and stirring time is preferably 5-15 min, more preferably 8-12 min, and still more preferably 10 min.
Then adding nano silicon dioxide and nano silicon, and dispersing and stirring to obtain mixed slurry; the rotation speed of the dispersion stirring is preferably 1500-2500 r/min, more preferably 1800-2200 r/min, and further preferably 2000 r/min; the time for dispersing and stirring is preferably 10-20 min, more preferably 13-18 min, and further preferably 15 min; in the present invention, it is preferable to adjust the rotation speed of the dispersion stirring and then add the nano-silica and the nano-silicon.
Mixing and stirring the mixed slurry, the coupling agent and the first defoaming agent to obtain a nano anti-channeling agent; in the invention, the mixed slurry and the coupling agent are preferably mixed and stirred firstly, and then the antifoaming agent is added and stirred to obtain the nano anti-channeling agent; the rotation speed of the mixing and stirring is preferably 1500-2500 r/min, more preferably 1800-2200 r/min, and further preferably 2000 r/min; the mixing and stirring time is preferably 5-15 min, more preferably 8-12 min, and further preferably 10 min; the rotating speed of the stirring is preferably 1500-2500 r/min, more preferably 1800-2200 r/min, and still more preferably 2000 r/min; the stirring time is preferably 5-15 min, more preferably 8-12 min, and still more preferably 10 min.
The invention also provides a channeling-preventing cement slurry containing the nano channeling-preventing agent, which comprises the following components in percentage by weight:
in accordance with the present invention, the grade G cement is preferably one or more of galaxin cement, sanxia cement and pond cement.
The content of the retarder is preferably 0.5-1.5 parts by weight; in some embodiments provided herein, the retarder is preferably present in an amount of 0.5 parts by weight; in some embodiments provided herein, the retarder is preferably present in an amount of 1 part by weight; in other embodiments provided herein, the retarder is preferably present in an amount of 1.5 parts by weight; the retarder is preferably one or more of citric acid, boric acid and lignosulfonate.
The content of the second defoaming agent is preferably 0.1-0.2 parts by weight, and more preferably 0.1 part by weight; the second defoaming agent is preferably one or more of emulsified silicone oil, a higher alcohol fatty acid ester compound, polyoxypropylene glycerol ether and polydimethylsiloxane.
The content of the filler is preferably 4 to 12 parts by weight, and more preferably 4 to 10 parts by weight; in some embodiments provided herein, the filler is preferably present in an amount of 10 parts by weight; in some embodiments provided herein, the filler is preferably present in an amount of 6 parts by weight; in other embodiments provided herein, the filler is preferably present in an amount of 4 parts by weight; the filler is preferably one or more of fly ash, slag and silica fume; the particle size of the filler is preferably 100 to 300 μm.
The content of the second dispersing agent is preferably 0.5-0.8 part by weight, and more preferably 0.5 part by weight; the second dispersant is preferably an aldehyde ketone condensate dispersant and/or a naphthalene dispersant.
The content of the prepared nano channeling-preventing agent is preferably 4 to 5 parts by weight, and more preferably 5 parts by weight.
The content of the fluid loss agent is preferably 3-8 parts by weight, more preferably 3-5 parts by weight, and further preferably 5 parts by weight; the fluid loss agent is preferably acrylamide-sodium acrylate copolymer and/or acrylamide-AMPS copolymer.
The content of the water is preferably 42-90 parts by weight; in some embodiments provided herein, the water is preferably present in an amount of 42 parts by weight; in some embodiments provided herein, the water is preferably present in an amount of 46 parts by weight; in other embodiments provided herein, the water is preferably present in an amount of 90 parts by weight.
The anti-channeling cement slurry provided by the invention can be added with a lightening agent or a weighting agent according to actual requirements, wherein the lightening agent or the weighting agent is used as a density regulator; the lightening agent is preferably floating beads and/or silica fume; the particle size of the lightening admixture is preferably 50-300 mu m, more preferably 100-200 mu m, and further preferably 100 mu m; the weighting agent is preferably one or more of iron ore powder, barite and manganese ore powder; the particle size of the weighting agent is preferably 50-100 μm, and more preferably 50 μm.
The density of the anti-channeling cement slurry provided by the invention is preferably 1.50-2.50 g/cm3More preferably 1.50 to 2.40g/cm3。
The anti-channeling cement slurry system provided by the invention has wide use temperature and density, and is applicable to temperature (BHCT): 4-15 ℃, is suitable for fresh water or undersaturated brine, can meet various well cementation requirements, and is particularly suitable for anti-channeling cement slurry for extended reach wells.
The invention also provides a preparation method of the anti-channeling cement slurry, which is obtained by mixing the raw materials.
The anti-channeling cement slurry provided by the invention is simple to mix and use on site, good in uniformity and easy to operate.
In order to further illustrate the present invention, the following describes in detail a nano-scale channeling-preventing agent, a preparation method thereof, and a channeling-preventing cement slurry, which are provided by the present invention, with reference to examples.
The reagents used in the following examples are all commercially available.
Example 1
Taking 100 parts by weight of distilled water, adjusting the rotating speed of a stirrer device to 1000r/min, adding 0.5 part by weight of sulfonated acetone-formaldehyde condensate into the distilled water, and stirring at a constant speed for 10 min; regulating the rotating speed to 2000r/min, then sequentially taking 25 parts by weight of 150nm nano silicon dioxide and 6 parts by weight of 200nm nano silicon to disperse in the solution at the rotating speed, and stirring for 15min until the mixture is uniformly dispersed to obtain mixed slurry; and adding 8 parts by weight of vinyl triethoxysilane into the mixed slurry, stirring for 10min at the rotating speed of 2000r/min, adding 0.5 part by weight of polyoxypropylene glycerol ether, and stirring for 10min at the rotating speed of 2000r/min to obtain the nano anti-channeling agent.
Example 2
Anti-channeling cement slurry for extended reach well, low density (1.50 g/cm)3) The feed comprises the following raw materials in parts by weight: 100 parts by weight of Jiahua grade G cement, 0.5 part by weight of retarder (boric acid), 0.1 part by weight of defoaming agent (polyoxypropylene glyceryl ether), 10 parts by weight of filler (fly ash with the particle size of 100 mu m), 0.5 part by weight of dispersant (sulfonated acetone-formaldehyde condensate), 5 parts by weight of channeling-preventing agent (the nano channeling-preventing agent prepared in example 1), 5 parts by weight of fluid loss agent (acrylamide-sodium acrylate copolymer), 20 parts by weight of lightening admixture (floating bead with the particle size of 100 mu m) and 90 parts by weight of water. And mixing and uniformly stirring the raw materials to prepare the anti-channeling cement slurry.
Example 3
Anti-channeling cement slurry for extended reach well, low density (1.90 g/cm)3) The feed comprises the following raw materials in parts by weight: 100 parts by weight of Jiahua grade G cement, 1.0 part by weight of retarder (boric acid), 0.1 part by weight of defoaming agent (polyoxypropylene glyceryl ether), 6 parts by weight of filler (fly ash with the particle size of 100 mu m), 0.5 part by weight of dispersant (sulfonated acetone-formaldehyde condensate), 5 parts by weight of channeling-preventing agent (the nano channeling-preventing agent prepared in example 1), 5 parts by weight of fluid loss agent (acrylamide-sodium acrylate copolymer) and 42 parts by weight of water. And mixing and uniformly stirring the raw materials to prepare the anti-channeling cement slurry.
Example 4
Anti-channeling cement slurry for extended reach well, low density (2.40 g/cm)3) The feed comprises the following raw materials in parts by weight: 100 parts by weight of Jiahua grade G cement, 1.5 parts by weight of retardingThe anti-channeling agent comprises a main component and auxiliary components, wherein the main component comprises an agent (boric acid), 0.1 part by weight of a defoaming agent (polyoxypropylene glycerol ether), 4 parts by weight of a filler (fly ash with the particle size of 100 mu m), 0.5 part by weight of a dispersing agent (sulfonated acetone-formaldehyde condensate), 5 parts by weight of a channeling-preventing agent (nano channeling-preventing agent prepared in example 1), 5 parts by weight of a fluid loss reducing agent (acrylamide-sodium acrylate copolymer), 140 parts by weight of a weighting agent (iron ore powder with the particle size of 50 mu m) and 46 parts by weight of water. And mixing and uniformly stirring the raw materials to prepare the anti-channeling cement slurry.
Comparative example 1
Common base channeling-preventing agent material, conventional low density (1.50 g/cm)3) The cement paste comprises the following raw materials in parts by weight: 100 parts by weight of Jiahua G-grade cement, 0.5 part by weight of retarder (boric acid), 0.1 part by weight of defoaming agent (polyoxypropylene glyceryl ether), 10 parts by weight of filler (fly ash with the particle size of 100 mu m), 0.5 part by weight of dispersant (sulfonated acetone-formaldehyde condensate), 5 parts by weight of channeling-preventing agent (styrene-butadiene latex with the solid content of 30%), 5 parts by weight of fluid loss additive (acrylamide-sodium acrylate copolymer), 20 parts by weight of lightening admixture (floating bead with the particle size of 100 mu m) and 90 parts by weight of water. And mixing and uniformly stirring the raw materials to prepare the anti-channeling cement slurry.
Comparative example 2
Common basic channeling-preventing agent material, normal density (1.90 g/cm)3) The cement paste comprises the following raw materials in parts by weight: 100 parts by weight of Jiahua grade G cement, 1.0 part by weight of retarder (boric acid), 0.1 part by weight of defoaming agent (polyoxypropylene glyceryl ether), 6 parts by weight of filler (the particle diameter of fly ash is 100 mu m), 0.5 part by weight of dispersant (sulfonated acetone-formaldehyde condensate), 5 parts by weight of channeling-preventing agent (styrene-butadiene latex with solid content of 30%), 5 parts by weight of fluid loss agent (acrylamide-sodium acrylate copolymer) and 42 parts by weight of water. And mixing and uniformly stirring the raw materials to prepare the anti-channeling cement slurry.
Comparative example 3
Conventional high density (2.40 g/cm)3) The cement paste comprises the following raw materials in parts by weight: 100 parts by weight of Jiahua grade G cement, 1.5 parts by weight of retarder (boric acid), 0.1 part by weight of defoaming agent (polyoxypropylene glyceryl ether), 4 parts by weight of filler (fly ash) and 0.5 part by weight of dispersing agent (sulfonated acetone-formaldehyde condensate)) 5 parts of a channeling-preventing agent (styrene-butadiene latex with the solid content of 30%), 5 parts of a fluid loss agent (acrylamide-sodium acrylate copolymer), 140 parts of a weighting agent (iron ore powder with the particle size of 50 mu m) and 46 parts of water. And mixing and uniformly stirring the raw materials to prepare the anti-channeling cement slurry.
The properties of the anti-channeling cement slurries obtained in examples 2 to 4 and comparative documents 1 to 3 were measured, and the results are shown in tables 1 and 2.
The cement slurry test was carried out according to the standard "oil well cement test method" GB/T19139-.
TABLE 1 measurement results of anti-channeling cement slurry properties
As can be seen from Table 1, the density of the anti-channeling cement paste (example) prepared by the method can be 1.50-2.40 g/cm3The range is adjusted, compared with cement slurry (comparative example) prepared by adopting a basic channeling-preventing agent, the fluidity of the new system is 24-27 cm, the water loss is controlled within 40ml, the slurry fluidity is better, the water loss is lower, the 24-hour compressive strength is obviously improved, the thickening time of the system is adjustable, and the comprehensive performance of the cement slurry is good.
TABLE 2 measurement results of anti-channeling property of cement paste
| Serial number | SPN | Static gel strength 48 to 240Pa development time (min) |
| Example 2 | 2.1 | 19 |
| Example 3 | 1.9 | 18 |
| Example 4 | 1.7 | 14 |
| Comparative example 1 | 2.5 | 23 |
| Comparative example 2 | 4.6 | 46 |
| Comparative example 3 | 5.2 | 43 |
The cement paste performance coefficient (SPN) is a cement paste performance evaluation parameter which comprehensively considers the cement paste thickening transition time and the cement paste weight loss rate; the smaller the SPN value is, the shorter the thickening transition time of the cement paste and the API water loss amount are, the better the anti-channeling performance is, and the SPN value of the cement paste with good anti-channeling performance is less than 10. As can be seen from the SPN values of the examples in the table, the nano gas channeling-preventing cement slurry provided by the invention has better channeling-preventing performance.
The transition time of static gel strength development refers to the transition time from 48Pa to 240Pa, the shorter the transition time of static gel strength development, the shorter the weight loss time of cement in the setting process, and the shorter the transition time of set cement strength, the stronger the capacity of preventing the weight loss from causing the fluid to move upwards. As can be seen from the data in the table, compared with the comparative example, the gas invasion danger static gel strength development transition time of the embodiment of the invention is obviously shortened, and the gas channeling prevention capability of the cement paste is enhanced.
As can be seen from Table 2, compared with the cement paste prepared by using the basic anti-channeling agent (comparative example), the anti-channeling cement paste prepared by the method disclosed by the invention has the advantages that the SPN value of a cement paste system prepared by the method is smaller (both less than 2), the static gel strength development time is faster (both less than 20min), the anti-channeling effect is better, and the construction requirement of a large displacement well can be met.
Claims (10)
1. The nanometer channeling-preventing agent is characterized by being prepared from the following components:
2. the nano channeling-preventing agent according to claim 1, wherein the nano silica has a particle size of 100 to 300 nm; the particle size of the nano silicon is 150-350 nm.
3. The nano channeling-preventing agent according to claim 1, wherein the coupling agent is selected from one or more of a complex coupling agent, a silane coupling agent and a titanate coupling agent; the first dispersant is selected from aldehyde ketone condensate dispersant and/or naphthalene dispersant; the first defoaming agent is selected from one or more of emulsified silicone oil, a higher alcohol fatty acid ester compound, polyoxypropylene glycerol ether and polydimethylsiloxane.
4. A method for preparing the nano channeling-preventing agent as defined in claim 1, comprising:
s1) mixing and stirring water and the first dispersing agent, then adding nano silicon dioxide and nano silicon, and dispersing and stirring to obtain mixed slurry;
s2) mixing and stirring the mixed slurry, the coupling agent and the first defoaming agent to obtain the nano anti-channeling agent.
5. The preparation method according to claim 4, wherein the rotation speed of the mixing and stirring in the step S1) is 500-1500 r/min; mixing and stirring for 5-15 min; the rotating speed of the dispersion stirring is 1500-2500 r/min; the time for dispersing and stirring is 10-20 min.
6. The preparation method according to claim 4, wherein in step S2), the mixed slurry and the coupling agent are mixed and stirred, and then a defoaming agent is added and stirred to obtain the nano anti-channeling agent; the rotation speed of the mixing and stirring is 1500-2500 r/min; mixing and stirring for 5-15 min; the stirring speed is 1500-2500 r/min; the stirring time is 5-15 min.
7. A channeling-preventing cement slurry, comprising:
8. the channeling-resistant cement slurry according to claim 7, wherein said set retarder is selected from one or more of citric acid, boric acid and lignosulfonate; the second defoaming agent is selected from one or more of emulsified silicone oil, a higher alcohol fatty acid ester compound, polyoxypropylene glycerol ether and polydimethylsiloxane; the filler is selected from one or more of fly ash, slag and micro silicon powder; the second dispersant is selected from aldehyde ketone condensate dispersant and/or naphthalene dispersant; the fluid loss agent is selected from acrylamide-sodium acrylate copolymer and/or acrylamide-AMPS copolymer; the lightening agent is selected from floating beads and/or silica fume; the weighting agent is selected from one or more of iron ore powder, barite and manganese ore powder.
9. The channeling-preventing cement slurry as claimed in claim 7, wherein the density of the channeling-preventing cement slurry is 1.50-2.50 g/cm3。
10. The channeling-preventing cement slurry as claimed in claim 7, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010633189.3A CN111704389A (en) | 2020-07-02 | 2020-07-02 | Nano channeling-preventing agent, preparation method thereof and channeling-preventing cement slurry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010633189.3A CN111704389A (en) | 2020-07-02 | 2020-07-02 | Nano channeling-preventing agent, preparation method thereof and channeling-preventing cement slurry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111704389A true CN111704389A (en) | 2020-09-25 |
Family
ID=72545391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010633189.3A Pending CN111704389A (en) | 2020-07-02 | 2020-07-02 | Nano channeling-preventing agent, preparation method thereof and channeling-preventing cement slurry |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111704389A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115636627A (en) * | 2022-09-09 | 2023-01-24 | 长江大学 | Integrated well cementation liquid system and application thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2013153626A (en) * | 2013-12-03 | 2015-06-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Национальный исследовательский Томский политехнический университет" | LIGHTWEIGHT TURNBOARD MATERIAL |
| CN105038745A (en) * | 2015-05-19 | 2015-11-11 | 成都欧美克石油科技有限公司 | Novel liquid silicon anti-channeling cement slurry used in well cementation |
| CN106554766A (en) * | 2015-09-28 | 2017-04-05 | 中国石油化工股份有限公司 | Anti-channeling emulsion, well cementation leakage-proof mud and preparation method thereof |
| CN107129796A (en) * | 2016-02-26 | 2017-09-05 | 中国石油化工股份有限公司 | Compound anti-migration agent, well cementation leakage-proof mud and preparation method thereof |
| CN107216070A (en) * | 2017-01-24 | 2017-09-29 | 中国石油集团长城钻探工程有限公司固井公司 | Efficient anti-erosion channeling control cement slurry system |
| CN108516756A (en) * | 2018-05-17 | 2018-09-11 | 中国石油化工股份有限公司 | High temperature resistance anti-gas channeling cement system and preparation method thereof |
-
2020
- 2020-07-02 CN CN202010633189.3A patent/CN111704389A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2013153626A (en) * | 2013-12-03 | 2015-06-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Национальный исследовательский Томский политехнический университет" | LIGHTWEIGHT TURNBOARD MATERIAL |
| CN105038745A (en) * | 2015-05-19 | 2015-11-11 | 成都欧美克石油科技有限公司 | Novel liquid silicon anti-channeling cement slurry used in well cementation |
| CN106554766A (en) * | 2015-09-28 | 2017-04-05 | 中国石油化工股份有限公司 | Anti-channeling emulsion, well cementation leakage-proof mud and preparation method thereof |
| CN107129796A (en) * | 2016-02-26 | 2017-09-05 | 中国石油化工股份有限公司 | Compound anti-migration agent, well cementation leakage-proof mud and preparation method thereof |
| CN107216070A (en) * | 2017-01-24 | 2017-09-29 | 中国石油集团长城钻探工程有限公司固井公司 | Efficient anti-erosion channeling control cement slurry system |
| CN108516756A (en) * | 2018-05-17 | 2018-09-11 | 中国石油化工股份有限公司 | High temperature resistance anti-gas channeling cement system and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115636627A (en) * | 2022-09-09 | 2023-01-24 | 长江大学 | Integrated well cementation liquid system and application thereof |
| CN115636627B (en) * | 2022-09-09 | 2023-10-27 | 长江大学 | Integrated well cementation liquid system and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4537918A (en) | Cement compositions for cementing wells, allowing pressure gas-channeling in the cemented annulus to be controlled | |
| CN101126018B (en) | Low-temperature hardening scurry-proof cement slurry for well cementing | |
| CN113716902B (en) | Compact and tough gas channeling prevention cement slurry system suitable for low-temperature well cementation and composition thereof | |
| CN105038745A (en) | Novel liquid silicon anti-channeling cement slurry used in well cementation | |
| CN115093173B (en) | Bionic reinforcing and toughening regulation method for microstructure of oil well cement stone, cement slurry system and application | |
| CN114477876B (en) | Long-term high-temperature-resistant toughened cementing sand-added cement combined material and preparation method thereof | |
| CN112694562A (en) | Preparation method of inorganic reinforced polymer gel microsphere emulsion for profile control and flooding | |
| CN109180084B (en) | Active self-repairing cement slurry system responding to oil gas | |
| CN113185237A (en) | Nano-enhanced phase-change antifreezing concrete mixture and preparation method thereof | |
| CN111056784B (en) | Cement slurry for hydrate well cementation and preparation method thereof | |
| CN111704389A (en) | Nano channeling-preventing agent, preparation method thereof and channeling-preventing cement slurry | |
| CN114380540A (en) | Large-temperature-difference well cementation cement slurry and preparation method thereof | |
| CN109880604B (en) | Weak coagulation accelerating type early strength agent for oil well cement | |
| CN111019616A (en) | Low-density cement slurry for well cementation operation and cement composition for well cementation operation | |
| CN110240430B (en) | Expansive fiber anti-cracking waterproof agent for concrete and preparation method thereof | |
| CN115093837B (en) | Wall fixing agent and preparation method and application thereof | |
| CN111040747A (en) | Long horizontal section horizontal well cementing curable pad fluid and application thereof | |
| CN113429163B (en) | Cement composition for well cementation operation, cement slurry system and preparation method thereof | |
| CN116730680A (en) | High-crack-resistance concrete and preparation method thereof | |
| CN116514446A (en) | Cement-based material water consumption sensitivity regulating agent | |
| CN112441778B (en) | Cement slurry composition, cement slurry for well cementation and preparation method and application thereof | |
| CN110228975B (en) | Preparation process of cement paste | |
| CN102618231B (en) | Low-temperature shallow channeling-prevention cement slurry | |
| CN112279592A (en) | Water-dispersion-resistant synchronous grouting material for water-rich stratum | |
| CN106316181B (en) | A kind of high-performance admixture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200925 |