CN115594795A - Salt-resistant and temperature-resistant fracturing fluid thickening agent, preparation method thereof and fracturing fluid - Google Patents
Salt-resistant and temperature-resistant fracturing fluid thickening agent, preparation method thereof and fracturing fluid Download PDFInfo
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- CN115594795A CN115594795A CN202211415395.2A CN202211415395A CN115594795A CN 115594795 A CN115594795 A CN 115594795A CN 202211415395 A CN202211415395 A CN 202211415395A CN 115594795 A CN115594795 A CN 115594795A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F220/56—Acrylamide; Methacrylamide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/32—Polymerisation in water-in-oil emulsions
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- 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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/66—Compositions based on water or polar solvents
- C09K8/68—Compositions based on water or polar solvents containing organic compounds
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- 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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
- C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/882—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
Abstract
The invention provides a salt-tolerant temperature-tolerant fracturing fluid thickening agent, a preparation method thereof and fracturing fluid, wherein the preparation method comprises the following steps: mixing acrylamide, vinylsulfonic acid, 2-acrylamido-2-methylpropanesulfonic acid, N-vinyl pyrrolidone, dimethyl diallyl ammonium chloride and deionized water to obtain an aqueous solution; mixing an emulsifier and an oil solvent to obtain an oil phase solution; and mixing the water phase solution and the oil phase solution to obtain a water-in-oil emulsion, slowly dripping an initiator for initiation, and carrying out polymerization reaction to obtain the thickening agent. The thickening agent is prepared by the preparation method of the salt-resistant and temperature-resistant fracturing fluid thickening agent. The fracturing fluid comprises the following components in percentage by mass: 1.0-1.5% of the polymer thickening agent, 0.4-0.5% of the metal cross-linking agent, 0.04-0.05% of the gel breaker and the balance of water. The thickening agent has the advantages of good stability, difficult layering, good water solubility, simple and convenient construction, good temperature resistance and the like.
Description
Technical Field
The invention relates to the technical field of oilfield fracturing modification, in particular to a salt-tolerant temperature-resistant fracturing fluid thickening agent, a preparation method thereof and fracturing fluid.
Background
In recent years, with the development of world economy and the progress of exploration technology, the exploration of oil and gas resources is continuously developed, the depth of a reservoir is continuously deepened, and the number of high-temperature deep wells is gradually increased year by year. The temperature resistance requirement on the reservoir reconstruction fracturing fluid is higher and higher. The fracturing fluid is mainly used for ensuring the operation strength when oil and gas are exploited, and can conduct the ground pressure to form cracks in the stratum; carrying the proppant to spread the proppant in the fracture; reducing the loss of extraneous fluids from the formation. The fracturing fluid is required to have the characteristics of higher viscosity, high shear resistance, good sand carrying capacity, small damage to stratum, gel breaking and the like at high temperature.
The volume fracturing in the existing oil and gas reservoir fracturing transformation process has the characteristic of large liquid using amount, correspondingly can generate a large amount of flowback liquid amount, and only the Changqing oil field generates flowback liquid more than 200 ten thousand. The components of various flowback liquids are complex, the mineralization degree is high, the content of suspended matters and bacteria is high, and the treatment and the recycling are difficult.
The current fracturing fluid thickening agent is mainly vegetable gum fracturing fluid, the thickening effect of the thickening agent system is good, but the vegetable gum system can resist 177 ℃ at the limit, can be degraded quickly after exceeding the limit temperature, and contains more water-insoluble vegetable fibers, and a large amount of residues can block the pore throat of a crack after breaking the gum, so that the damage is caused, and the fracturing effect is influenced. The synthetic polymer does not contain water-insoluble substances, has good viscoelasticity and thixotropy and low dosage, and has great development space.
Disclosure of Invention
The present invention aims to address at least one of the above-mentioned deficiencies of the prior art. For example, one object of the invention is to provide a salt-tolerant and temperature-tolerant fracturing fluid thickening agent and a preparation method thereof, and the other object of the invention is to provide a salt-tolerant and temperature-tolerant fracturing fluid.
In order to achieve the above object, one aspect of the present invention provides a preparation method of a salt-tolerant temperature-tolerant fracturing fluid thickening agent, comprising the steps of:
mixing a certain amount of acrylamide, vinylsulfonic acid, 2-acrylamido-2-methylpropanesulfonic acid, N-vinylpyrrolidone, dimethyl diallyl ammonium chloride and deionized water, and uniformly stirring to obtain an aqueous solution;
mixing and stirring a certain amount of emulsifier and oil solvent uniformly to obtain an oil phase solution;
stirring and mixing the water phase solution and the oil phase solution to obtain a uniform and stable water-in-oil emulsion;
and introducing nitrogen into the water-in-oil emulsion, stirring at a high speed to obtain an emulsion, slowly dropping an initiator into the emulsion for initiation, and carrying out polymerization reaction under the condition of heat preservation to obtain the emulsion polymer thickening agent.
In an exemplary embodiment of an aspect of the present invention, the temperature of the polymerization reaction may be 40 to 60 ℃ and the reaction time may be 6 to 8 hours.
In one exemplary embodiment of one aspect of the invention, the acrylamide, vinyl sulfonic acid, 2-acrylamido-2-methylpropanesulfonic acid, N-vinyl pyrrolidone, dimethyldiallylammonium chloride, emulsifier, oil solvent, initiator, deionized water may be mixed in a weight ratio of 45 to 60.
In one exemplary embodiment of an aspect of the present invention, the emulsifier and the oil solvent may be mixed in a weight ratio of 5 to 10:80 to 85 percent of the mixture.
In an exemplary embodiment of one aspect of the present invention, the emulsifier may be one or more of Span80, T-80, OP-4, and the oil solvent may be one of white oil, liquid paraffin, cyclohexane, or kerosene.
In an exemplary embodiment of an aspect of the present invention, the initiator may be one of ammonium persulfate, potassium persulfate, or azobisisobutyramidine hydrochloride.
The invention also provides a salt-resistant and temperature-resistant fracturing fluid thickening agent which can be prepared by the preparation method of any one of the salt-resistant and temperature-resistant fracturing fluid thickening agents.
In another aspect, the invention provides a salt-tolerant temperature-tolerant fracturing fluid, which may include, by mass: 1.0-1.5% of the polymer thickening agent, 0.4-0.5% of metal cross-linking agent, 0.04-0.05% of gel breaker and the balance of water.
In an exemplary embodiment of the further aspect of the invention, the metal crosslinking agent may be a built crosslinking agent of inorganic titanium and inorganic zirconium, and the gel breaker may be ammonium persulfate capsules and/or ammonium persulfate.
In an exemplary embodiment of a further aspect of the invention, the fracturing fluid may be sheared at 180 ℃ for 2 hours while maintaining a viscosity above 150 mPa-s.
Compared with the prior art, the invention has the beneficial effects of at least one of the following contents:
(1) The preparation method of the salt-resistant and temperature-resistant fracturing fluid thickening agent prepares the salt-resistant and temperature-resistant emulsion-like thickening agent through inverse emulsion polymerization, and the thickening agent has the advantages of good stability, difficulty in layering, good water solubility and simplicity and convenience in site construction;
(2) The fracturing fluid prepared by the thickening agent prepared by the preparation method of the salt-resistant and temperature-resistant fracturing fluid thickening agent has good temperature resistance, the viscosity of the fracturing fluid can still be kept above 150mPa & s after the fracturing fluid is sheared for 2 hours at 180 ℃, and the fracturing fluid has good temperature resistance;
(3) The thickening agent prepared by the preparation method of the salt-resistant and temperature-resistant fracturing fluid thickening agent can be prepared by using high salinity water, and the fracturing fluid prepared by using 100000mg/L of water still has good temperature-resistant and sand-carrying properties.
Drawings
The above and other objects and/or features of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings, in which:
FIG. 1 shows the rheological curves of a fracturing fluid formulated with a salt and temperature tolerant fracturing fluid viscosifier prepared in example 1 of the present invention;
FIG. 2 shows the rheological curves of a fracturing fluid formulated with a salt and temperature tolerant fracturing fluid viscosifier prepared in example 2 of the present invention;
FIG. 3 shows the rheological curves of a fracturing fluid formulated with a salt and temperature tolerant fracturing fluid viscosifier prepared in example 3 of the present invention;
figure 4 shows the rheological curves of fracturing fluids formulated with salt and temperature resistant fracturing fluid viscosifier prepared in example 4 of the present invention plus 100000mg/L NaCl brine.
Detailed Description
Hereinafter, a salt-resistant and temperature-resistant fracturing fluid thickener, a preparation method thereof and a fracturing fluid according to the present invention will be described in detail with reference to exemplary embodiments.
It should be noted that "first," "second," "third," and the like are merely for convenience of description and for ease of distinction, and are not to be construed as indicating or implying relative importance.
FIG. 1 shows the rheological curves of a fracturing fluid formulated with a salt and temperature tolerant fracturing fluid viscosifier prepared in example 1 of the present invention; FIG. 2 shows the rheological curves of a fracturing fluid formulated with a salt and temperature tolerant fracturing fluid viscosifier prepared in example 2 of the present invention; FIG. 3 shows the rheological curves of a fracturing fluid formulated with a salt and temperature tolerant fracturing fluid viscosifier prepared in example 3 of the present invention; figure 4 shows the rheological curves of fracturing fluids formulated with salt and temperature resistant fracturing fluid viscosifier prepared in example 4 of the present invention plus 100000mg/L NaCl brine.
In a first exemplary embodiment of the invention, a method of preparing a salt and temperature tolerant fracturing fluid viscosifier, the method comprising the steps of:
mixing a certain amount of acrylamide, vinylsulfonic acid, 2-acrylamido-2-methylpropanesulfonic acid, N-vinylpyrrolidone, dimethyl diallyl ammonium chloride and deionized water, and uniformly stirring to obtain an aqueous solution. Mixing a certain amount of emulsifier and oil solvent, and stirring uniformly to obtain oil phase solution.
And stirring and mixing the water phase solution and the oil phase solution to obtain a uniform and stable water-in-oil emulsion.
And introducing nitrogen into the water-in-oil emulsion, stirring at a high speed to obtain an emulsion, slowly dropping an initiator into the emulsion for initiation, and carrying out polymerization reaction under the condition of heat preservation to obtain the emulsion polymer thickening agent. Here, nitrogen gas is introduced for removing oxygen, and the stirring speed of the high-speed stirring is 3000 to 3500r/min.
In the present exemplary embodiment, the temperature of the polymerization reaction may be 40 to 60 ℃, for example, 42 ℃, 45 ℃, 50 ℃, 55 ℃, 58 ℃, and the time of the polymerization reaction may be 6 to 8 hours, for example, 6.5 hours, 7 hours, 7.5 hours.
In the present exemplary embodiment, the acrylamide, vinylsulfonic acid, 2-acrylamido-2-methylpropanesulfonic acid, N-vinylpyrrolidone, dimethyldiallylammonium chloride, emulsifier, oil solvent, initiator, and deionized water may be mixed in a weight ratio of 45 to 60. For example, acrylamide, vinyl sulfonic acid, 2-acrylamido-2-methyl propane sulfonic acid, N-vinyl pyrrolidone, dimethyl diallyl ammonium chloride, an emulsifier, an oil solvent, an initiator and deionized water are mixed in a weight ratio of 50 to 55.
In the present exemplary embodiment, the emulsifier and the oil solvent may be mixed in a weight ratio of 5 to 10:80 to 85 percent of the mixture.
In the present exemplary embodiment, the emulsifier may be one or more of Span80, T-80, OP-4, and the oil solvent may be one of white oil, liquid paraffin, cyclohexane, or kerosene. In the present exemplary embodiment, the initiator may be one of ammonium persulfate, potassium persulfate, or azobisisobutyramidine hydrochloride.
A second exemplary embodiment of the present invention provides a salt-tolerant and temperature-tolerant fracturing fluid thickener, which can be prepared by the preparation method of the salt-tolerant and temperature-tolerant fracturing fluid thickener described in the first exemplary embodiment.
A third exemplary embodiment of the present invention provides a salt and temperature resistant fracturing fluid, which may include, by mass: 1.0-1.5% of the polymer thickener described in the first or second exemplary embodiment above, 0.4-0.5% of the metal crosslinker, 0.04-0.05% of the breaker, and the balance water.
In the exemplary embodiment, the metal cross-linking agent may be an inorganic titanium and zirconium compound cross-linking agent, and the gel breaker may be an ammonium persulfate capsule and/or an ammonium persulfate. For example, the metal crosslinker is inorganic titanium: the inorganic zirconium is obtained by compounding 4:1.
In the present exemplary embodiment, the fracturing fluid may be sheared at 180 ℃ for 2 hours while maintaining a viscosity of 150 mPa-s or more.
The above-described exemplary embodiments of the present invention are further illustrated and described below with reference to specific examples.
Example 1
The embodiment of the invention prepares a salt-tolerant temperature-resistant fracturing fluid thickening agent, and the specific preparation method comprises the following steps:
the water phase comprises the following components in parts by weight: 55 parts of acrylamide, 15 parts of vinyl sulfonic acid, 15 parts of 2-acrylamido-2-methylpropanesulfonic acid, 3 parts of N-vinyl pyrrolidone, 0.5 part of dimethyldiallylammonium chloride and 90 parts of deionized water.
Preparing solution according to the formula, and stirring and mixing uniformly.
The preparation steps of the oil phase are as follows:
furthermore, the emulsifier is mixture of Span80 and T-80 according to the mass ratio of 1:1.
Still further, the oil solvent is white oil.
5 parts of emulsifier and 85 parts of white oil are mixed and stirred uniformly.
Still further, the initiator is potassium persulfate.
Mixing the water phase and the oil phase uniformly, introducing nitrogen for 30min, stirring at high speed, slowly dropping 3 parts of potassium persulfate into the emulsion for initiation, and carrying out polymerization reaction at 50 ℃ for 8h to obtain the emulsion thickening agent A.
Preparing the thickening agent A into a 1.5% solution, adding 0.5% of metal cross-linking agent, and fully stirring to obtain the fracturing fluid.
At 170s -1 Test pressure at 180 deg.CAs shown in FIG. 1, the viscosity of the cracked liquid system was initially 72 mPas, and then gradually increased, as a temperature-time curve.
Example 2
The embodiment prepares a salt-tolerant temperature-resistant fracturing fluid thickening agent, and the specific preparation method comprises the following steps:
the water phase comprises the following components in parts by weight: 60 parts of acrylamide, 15 parts of vinyl sulfonic acid, 20 parts of 2-acrylamido-2-methylpropanesulfonic acid, 5 parts of N-vinyl pyrrolidone, 1 part of dimethyl diallyl ammonium chloride and 90 parts of deionized water.
Preparing solution according to the formula, and stirring and mixing uniformly.
The preparation steps of the oil phase are as follows:
furthermore, the emulsifier is Span80 and T-80 with the mass ratio of 1:1.
Still further, the oil solvent is white oil.
Mixing 10 parts of emulsifier and 85 parts of white oil, and stirring uniformly.
Still further, the initiator is potassium persulfate.
And uniformly mixing the prepared water phase and the oil phase, introducing nitrogen for 30min, stirring at a high speed, slowly dripping 2 parts of potassium persulfate into the emulsion for initiation, preserving heat at 60 ℃ for polymerization reaction, and reacting for 8h to obtain the emulsion thickening agent B. As shown in FIG. 2, the system tack 359 pas, after which the viscosity slowly increased.
Example 3
The embodiment prepares a salt-tolerant temperature-resistant fracturing fluid thickening agent, and the specific preparation method comprises the following steps:
the water phase comprises the following components in parts by weight: 55 parts of acrylamide, 20 parts of vinyl sulfonic acid, 20 parts of 2-acrylamido-2-methylpropanesulfonic acid, 5 parts of N-vinyl pyrrolidone, 1 part of dimethyl diallyl ammonium chloride and 100 parts of deionized water.
Preparing solution according to the formula, and stirring and mixing uniformly.
The preparation steps of the oil phase are as follows:
further, the emulsifier is Span80 to T-80 mass ratio of 1:1.
Still further, the oil solvent is white oil.
5 parts of emulsifier and 90 parts of white oil are mixed and stirred uniformly.
Still further, the initiator is potassium persulfate.
And uniformly mixing the prepared water phase and the oil phase, introducing nitrogen for 30min, stirring at a high speed, slowly dripping 4 parts of potassium persulfate into the emulsion for initiation, preserving heat at 60 ℃ for polymerization reaction, and reacting for 8 hours to obtain the emulsion thickening agent C. As shown in FIG. 3, the viscosity of the system was increased gradually after the initial viscosity of 446 pas.
Example 4
The embodiment of the invention prepares a salt-tolerant temperature-resistant fracturing fluid thickening agent, and the specific preparation method comprises the following steps:
the water phase comprises the following components in parts by weight: 55 parts of acrylamide, 15 parts of vinyl sulfonic acid, 20 parts of 2-acrylamido-2-methylpropanesulfonic acid, 10 parts of N-vinyl pyrrolidone, 1 part of dimethyl diallyl ammonium chloride and 100 parts of deionized water.
Preparing solution according to the formula, and stirring and mixing uniformly.
The preparation steps of the oil phase are as follows:
furthermore, the emulsifier is Span80 and T-80 with the mass ratio of 1:1.
Still further, the oil solvent is white oil.
8 parts of emulsifier and 90 parts of white oil are mixed and stirred uniformly.
Still further, the initiator is potassium persulfate.
And uniformly mixing the prepared water phase and the oil phase, introducing nitrogen for 30min, stirring at a high speed, slowly dripping 4 parts of potassium persulfate into the emulsion for initiation, preserving heat at 60 ℃ for polymerization reaction, and reacting for 8h to obtain the emulsion thickening agent D. As shown in FIG. 4, the viscosity of the system was 385 pas at the initial viscosity, and then gradually increased.
In summary, the advantages of the present invention can include at least one of the following:
(1) The preparation method of the salt-resistant and temperature-resistant fracturing fluid thickening agent prepares the salt-resistant and temperature-resistant emulsion-like thickening agent through inverse emulsion polymerization, and the thickening agent has the advantages of good stability, difficulty in layering, good water solubility and simplicity and convenience in site construction;
(2) The fracturing fluid prepared by the thickening agent prepared by the preparation method of the salt-resistant and temperature-resistant fracturing fluid thickening agent has good temperature resistance, the viscosity of the fracturing fluid can still be kept above 150mPa & s after the fracturing fluid is sheared for 2 hours at 180 ℃, and the fracturing fluid has good temperature resistance;
(3) The thickening agent prepared by the preparation method of the salt-resistant and temperature-resistant fracturing fluid thickening agent can be prepared by using high salinity water, and the fracturing fluid prepared by using 100000mg/L of water still has good temperature-resistant and sand-carrying properties.
Although the present invention has been described above in connection with exemplary embodiments, it will be apparent to those skilled in the art that various modifications and changes may be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A preparation method of a salt-resistant and temperature-resistant fracturing fluid thickening agent is characterized by comprising the following steps:
mixing a certain amount of acrylamide, vinylsulfonic acid, 2-acrylamido-2-methylpropanesulfonic acid, N-vinylpyrrolidone, dimethyl diallyl ammonium chloride and deionized water, and uniformly stirring to obtain an aqueous solution;
mixing and stirring a certain amount of emulsifier and oil solvent uniformly to obtain an oil phase solution;
stirring and mixing the water phase solution and the oil phase solution to obtain uniform and stable water-in-oil emulsion;
and introducing nitrogen into the water-in-oil emulsion, stirring at a high speed to obtain an emulsion, slowly dropping an initiator into the emulsion for initiation, and carrying out polymerization reaction under the condition of heat preservation to obtain the emulsion polymer thickening agent.
2. The preparation method of the salt-tolerant temperature-tolerant fracturing fluid thickening agent according to claim 1, wherein the temperature of the polymerization reaction is 40-60 ℃ and the reaction time is 6-8 h.
3. The preparation method of the salt-tolerant temperature-tolerant fracturing fluid thickening agent of claim 1 is characterized in that the acrylamide, vinyl sulfonic acid, 2-acrylamido-2-methyl propane sulfonic acid, N-vinyl pyrrolidone, dimethyl diallyl ammonium chloride, an emulsifier, an oil solvent, an initiator and deionized water are mixed according to the weight ratio of 45-60.
4. The preparation method of the salt-tolerant temperature-tolerant fracturing fluid thickening agent according to claim 1, wherein the weight ratio of the emulsifier to the oil solvent is 5-10: 80 to 85 percent of the mixture.
5. The preparation method of the salt-tolerant temperature-resistant fracturing fluid thickening agent according to claim 1, wherein the emulsifier is one or more of Span80, T-80 and OP-4, and the oil solvent is one of white oil, liquid paraffin, cyclohexane or kerosene.
6. The method for preparing the salt-resistant and temperature-resistant fracturing fluid thickener according to claim 1, wherein the initiator is one of ammonium persulfate, potassium persulfate or azobisisobutyramidine hydrochloride.
7. A salt and temperature resistant fracturing fluid thickener prepared by the method of any one of claims 1 to 6.
8. The salt-resistant temperature-resistant fracturing fluid is characterized by comprising the following components in percentage by mass: 1.0-1.5% of a polymer thickener according to any of claims 1-7, 0.4-0.5% of a metal cross-linking agent, 0.04-0.05% of a gel breaker, and the balance water.
9. The salt-resistant temperature-resistant fracturing fluid of claim 8, wherein the metal cross-linking agent is a compound cross-linking agent of inorganic titanium and inorganic zirconium, and the gel breaker is an ammonium persulfate capsule and/or ammonium persulfate.
10. The salt-resistant temperature-resistant fracturing fluid of claim 8, wherein the viscosity of the fracturing fluid remains above 150 mPa-s when the fracturing fluid is sheared for 2 hours at 180 ℃.
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| CN117143585A (en) * | 2023-10-31 | 2023-12-01 | 东营市宝泽能源科技有限公司 | Emulsion type thickening agent and preparation method thereof |
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| CN114805692A (en) * | 2022-06-27 | 2022-07-29 | 山东诺尔生物科技有限公司 | Composition for preparing fracturing thickening agent, fracturing thickening agent and preparation method thereof |
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| CN103254886A (en) * | 2012-12-31 | 2013-08-21 | 东营明德石油科技有限公司 | Supermolecule multiple association cleaning fracturing fluid and preparation method thereof |
| US20140309368A1 (en) * | 2013-02-21 | 2014-10-16 | S.P.C.M. Sa | Process for low-concentration, inverse emulsion polymerization of weakly neutralized polymers and inverse emulsions obtained |
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| CN114805692A (en) * | 2022-06-27 | 2022-07-29 | 山东诺尔生物科技有限公司 | Composition for preparing fracturing thickening agent, fracturing thickening agent and preparation method thereof |
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| CN116622362A (en) * | 2023-07-21 | 2023-08-22 | 东营市百扬石油科技有限责任公司 | Salt-resistant emulsion fracturing fluid thickener and preparation process thereof |
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| CN117143585B (en) * | 2023-10-31 | 2024-02-09 | 东营市宝泽能源科技有限公司 | Emulsion type thickening agent and preparation method thereof |
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