CN109135712A - A kind of shale gas fracturing fluid instant water-in-water emulsion friction reducer and preparation method thereof - Google Patents
A kind of shale gas fracturing fluid instant water-in-water emulsion friction reducer and preparation method thereof Download PDFInfo
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- CN109135712A CN109135712A CN201810866882.8A CN201810866882A CN109135712A CN 109135712 A CN109135712 A CN 109135712A CN 201810866882 A CN201810866882 A CN 201810866882A CN 109135712 A CN109135712 A CN 109135712A
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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
- 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
- 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 present invention provides a kind of shale gas fracturing fluid instant water-in-water emulsion friction reducer and preparation method thereof, is related to oil and gas exploration technology field.A kind of instant water-in-water emulsion friction reducer of shale gas fracturing fluid, component including following parts by weight: 45-70 parts of acrylamide, 1-30 parts of MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, 1-30 parts of acrylic acid, 0.01-0.3 parts of tert-butyl hydroperoxide, 0.01-0.3 parts of polymethyl acyloxyethyl trimethyl ammonium chloride, 1-35 parts of ammonium sulfate solution.The invention has that instant, molecular weight is high, advantages energy saving, efficient, environmentally friendly, easy to use and cheap etc., avoid indissoluble existing for previous product, energy consumption, pollution environment, it is expensive the disadvantages of.
Description
Technical field
The present invention relates to oil and gas exploration technology fields, and in particular to a kind of instant water-water of shale gas fracturing fluid
Lotion friction reducer and preparation method thereof.
Background technique
Currently, aqueous solution polymerization product mainly has the hydrosol and powdered polyacrylamide.The hydrosol is acrylamide
Aqueous solution through homopolymerization or with a kind of product that other monomers are copolymerized, be the polyacrylamide amine product of early stage.Usually this dose
The product solid content of type is lower (8% or so), and storage and transportation cost are high, and molecular weight is lower, is hundreds of thousands to millions of
Between, thus application is very restricted.Aqueous solution polymerization method prepares powder product, and with water as solvent, synthesis is simple, institute
Polymer molecular weight is higher and Product transport cost is relatively low, most domestic producer all uses this method to produce polypropylene at present
Amide is the product being most widely used.But powdery product is in process of production, and reaction heat is difficult to remove, it is easy implode,
And with the progress of reaction, reaction system viscosity increases, and stirring difficulty also increases, and drying process consumes big energy.Make
The problems such as big, dissolution is difficult in the process, there are dust, the energy consumption of personal safety and dissolution equipment is also caused to increase in this way,
And there is the disadvantages of indissoluble, energy consumption in the product of other dosage forms to circulate on Vehicles Collected from Market.
Summary of the invention
The present invention provides a kind of shale gas fracturing fluid instant water-in-water emulsion friction reducer and preparation method thereof, on solving
The problem of stating.
To solve the above problems, The technical solution adopted by the invention is as follows:
The instant water-in-water emulsion friction reducer of a kind of shale gas fracturing fluid, it is characterised in that: including following parts by weight
Component: 45-70 parts of acrylamide, 1-30 parts of MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, 1-30 parts of acrylic acid, tert-butyl mistake
0.01-0.3 parts of hydrogen oxide, 0.01-0.3 parts of polymethyl acyloxyethyl trimethyl ammonium chloride, 1-35 parts of ammonium sulfate solution.
The present invention prepares acrylamide, MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride and acrylic acid using dispersin polymerization
Terpolymer, monomeric acrylamide, MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride and acrylic acid in ammonium sulfate solution,
Copolyreaction is carried out by initiator of tert-butyl hydroperoxide, and in dispersing agent polymethyl acyloxyethyl trimethyl ammonia chloride
" water-water " lotion is finally obtained under ammonium stabilization.The polyacrylamide point prepared in an aqueous medium using dispersion copolymerization method
Granular media is also referred to as polyacrylamide " water-water " lotion.Why it is referred to as " water-water " lotion, be because dispersing agent and its
The continuous phase and polymer of entrained water of hydration and its dispersed phase of water of hydration are all water phases, and two-phase is immiscible." water
It is diluted when Bao Shui " lotion uses using a large amount of water, polymer emulsion can be quickly dissolved into water.The dosage form product have it is instant,
Molecular weight is high, advantages energy saving, efficient, environmentally friendly, easy to use and cheap etc., avoids indissoluble existing for previous product, energy consumption, dirt
Contaminate environment, it is expensive the disadvantages of.
Further, acrylamide 50-65 parts, 5-25 parts of MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, acrylic acid 5-
25 parts, 0.05-0.25 parts of tert-butyl hydroperoxide, 0.05-0.25 parts of polymethyl acyloxyethyl trimethyl ammonium chloride, sulfuric acid
1-30 parts of aqueous ammonium.
Further, 60 parts of acrylamide, 10 parts of MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, 10 parts of acrylic acid, uncle
0.1 part of butylhydroperoxide, 0.1 part of polymethyl acyloxyethyl trimethyl ammonium chloride, 19.8 parts of ammonium sulfate solution.
Further, a kind of described in any item shale gas fracturing fluids of claim 1-3 are dropped with instant water-in-water emulsion and are hindered
The preparation method of agent, comprising:
(1) a certain amount of propylene is added in the reaction vessel equipped with condenser pipe, nitrogen conduit, thermometer and agitating device
Amide, MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, acrylic acid, ammonium sulfate, polymethyl acyloxyethyl trimethyl ammonia chloride
Ammonium and deionized water, constant speed stirs, dissolves raw material sufficiently in water bath with thermostatic control, stirs evenly；
(2) after leading to nitrogen deoxygenation half an hour, initiator tert-butyl hydroperoxide is added for the first time.System is in nitrogen protection
After lower reaction 2 hours, second of addition initiator tert-butyl hydroperoxide reacts 11 hours, finally obtains low apparent viscosity
Dispersion emulsion, the as described instant water-in-water emulsion friction reducer.
Further, the temperature of the water bath with thermostatic control in the step (1) is 50 DEG C.Polymerization temperature divides polyacrylamide
Son amount has significant impact, and when initiation temperature is lower, polymer intrinsic viscosity decreases, because of initiator tert-butyl hydroperoxide
Hydrogen decomposition rate is excessively slow, and the rate of polymer molecule chain growth is also very slow, and reaction system is in the nucleation period for a long time, and viscosity is big,
Thus monomer, which not can enter in little particle, reacts, and molecular weight is caused to reduce.Optimal reaction temperature is 50-65 DEG C.
Further, the polymethyl acyloxyethyl trimethyl ammonium chloride in the step (1), concentration 0.16g/g.
When polymethyl acyloxyethyl trimethyl ammonia chloride ammonium concentration is too low, the little particle of precipitation can not obtain polymethyl acyl-oxygen
The sufficient Vapor recovery unit effect of ethyl-trimethyl salmiac, thus fail to form lotion, thick product is obtained, lotion is apparently glued
It spends especially big.When excessive concentration, the inherent viscosity of polymer is reduced, and apparent viscosity increases.The convenient range of dispersant dosage
For (0.16-0.20) g/g.
Further, acrylamide, the MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride and third being added in the step (1)
The molar ratio of olefin(e) acid is 8:1:1.Monomer ratio influences polymer intrinsic viscosity and performance very big.When the ratio of DMC and AA increases
When big, polymer intrinsic viscosity is gradually decreased, and apparent viscosity is gradually increased, and the performance of product is also deteriorated.This is because cationic
It is reduced with the ratio of anionic monomer, so that the positive charge of polymer molecular chain surplus increases, hydrophily certainly will be caused to enhance, gathered
Closing object little particle is more difficult to be formed, and monomer fails effectively to react in solid phase, and molecular weight reduces, and apparent viscosity also increases with it.
Comprehensively consider, best monomer mole ratio is n (acrylamide): n (MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride): n (propylene
Acid)=8:1:1.
Further, in the step (2), the concentration for the initiator tert-butyl hydroperoxide that the first time is added is 1
×10-4The concentration of g/g, second of initiator tert-butyl hydroperoxide being added are 1.33 × 10-4g/g.The tertiary fourth of initiator
When base hydrogen peroxide use is too small, reaction is difficult to cause or reaction speed is very slow, and inherent viscosity decreases.When dosage is excessive
When, the reaction system a large amount of living radical of output in a short time, collision probability increases between free radical, and it is big to terminate rate
In rate of rise, thus a large amount of free radical premature end, growing chain radical life shorten, and polymer intrinsic viscosity is lower.
Initiator optimum amount is at (1.3-3.2) × 10-4g/g。
Reaction time length is significant to actual industrial production.Time is too short, and conversion ratio and inherent viscosity be not high,
Time too long energy consumption is big and influences production efficiency, thus optimum reacting time is 11-12 hours.
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are:
1. the present invention has, instant, molecular weight is high, advantages energy saving, efficient, environmentally friendly, easy to use and cheap etc., avoids
Indissoluble existing for previous product, energy consumption, pollution environment, it is expensive the disadvantages of.
2. friction reducer is prepared using preparation method of the present invention, it is simple and high-efficient.
Specific embodiment
All features disclosed in this specification can be with any other than mutually exclusive feature and/or step
Mode combines.
Embodiment 1
The instant water-in-water emulsion friction reducer of a kind of shale gas fracturing fluid, it is characterised in that: including following parts by weight
Component: 45 parts of acrylamide, 1 part of MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, 1 part of acrylic acid, tert-butyl hydroperoxide
0.01 part, 0.01 part of polymethyl acyloxyethyl trimethyl ammonium chloride, 1 part of ammonium sulfate solution.
Preparation method includes the following steps:
(1) a certain amount of propylene is added in the reaction vessel equipped with condenser pipe, nitrogen conduit, thermometer and agitating device
Amide, MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, acrylic acid, ammonium sulfate, polymethyl acyloxyethyl trimethyl ammonia chloride
Ammonium and deionized water, constant speed stirs, dissolves raw material sufficiently in water bath with thermostatic control, stirs evenly；
(2) after leading to nitrogen deoxygenation half an hour, initiator tert-butyl hydroperoxide is added for the first time.System is in nitrogen protection
After lower reaction 2 hours, second of addition initiator tert-butyl hydroperoxide reacts 11 hours, finally obtains low apparent viscosity
Dispersion emulsion, the as described instant water-in-water emulsion friction reducer.
Embodiment 2
The instant water-in-water emulsion friction reducer of a kind of shale gas fracturing fluid, it is characterised in that: including following parts by weight
Component: 70 parts of acrylamide, 30 parts of MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, 30 parts of acrylic acid, tert-butyl hydroperoxide
0.3 part, 0.3 part of polymethyl acyloxyethyl trimethyl ammonium chloride, 35 parts of ammonium sulfate solution.
Preparation method includes the following steps:
(1) a certain amount of propylene is added in the reaction vessel equipped with condenser pipe, nitrogen conduit, thermometer and agitating device
Amide, MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, acrylic acid, ammonium sulfate, polymethyl acyloxyethyl trimethyl ammonia chloride
Ammonium and deionized water, constant speed stirs, dissolves raw material sufficiently in water bath with thermostatic control, stirs evenly；
(2) after leading to nitrogen deoxygenation half an hour, initiator tert-butyl hydroperoxide is added for the first time.System is in nitrogen protection
After lower reaction 2 hours, second of addition initiator tert-butyl hydroperoxide reacts 11 hours, finally obtains low apparent viscosity
Dispersion emulsion, the as described instant water-in-water emulsion friction reducer.
Embodiment 3
The instant water-in-water emulsion friction reducer of a kind of shale gas fracturing fluid, it is characterised in that: including following parts by weight
Component: 50 parts of acrylamide, 5 parts of MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, 5 parts of acrylic acid, tert-butyl hydroperoxide
0.05 part, 0.05 part of polymethyl acyloxyethyl trimethyl ammonium chloride, 1 part of ammonium sulfate solution.
Preparation method includes the following steps:
(1) a certain amount of propylene is added in the reaction vessel equipped with condenser pipe, nitrogen conduit, thermometer and agitating device
Amide, MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, acrylic acid, ammonium sulfate, polymethyl acyloxyethyl trimethyl ammonia chloride
Ammonium and deionized water, constant speed stirs, dissolves raw material sufficiently in water bath with thermostatic control, stirs evenly；
(2) after leading to nitrogen deoxygenation half an hour, initiator tert-butyl hydroperoxide is added for the first time.System is in nitrogen protection
After lower reaction 2 hours, second of addition initiator tert-butyl hydroperoxide reacts 11 hours, finally obtains low apparent viscosity
Dispersion emulsion, the as described instant water-in-water emulsion friction reducer.
Embodiment 4
The instant water-in-water emulsion friction reducer of a kind of shale gas fracturing fluid, it is characterised in that: including following parts by weight
Component: 65 parts of acrylamide, 25 parts of MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, 25 parts of acrylic acid, tert-butyl hydroperoxide
0.25 part, 0.25 part of polymethyl acyloxyethyl trimethyl ammonium chloride, 30 parts of ammonium sulfate solution.
Preparation method includes the following steps:
(1) a certain amount of propylene is added in the reaction vessel equipped with condenser pipe, nitrogen conduit, thermometer and agitating device
Amide, MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, acrylic acid, ammonium sulfate, polymethyl acyloxyethyl trimethyl ammonia chloride
Ammonium and deionized water, constant speed stirs, dissolves raw material sufficiently in water bath with thermostatic control, stirs evenly；
(2) after leading to nitrogen deoxygenation half an hour, initiator tert-butyl hydroperoxide is added for the first time.System is in nitrogen protection
After lower reaction 2 hours, second of addition initiator tert-butyl hydroperoxide reacts 11 hours, finally obtains low apparent viscosity
Dispersion emulsion, the as described instant water-in-water emulsion friction reducer.
Embodiment 5
The instant water-in-water emulsion friction reducer of a kind of shale gas fracturing fluid, it is characterised in that: including following parts by weight
Component: 60 parts of acrylamide, 10 parts of MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, 10 parts of acrylic acid, tert-butyl hydroperoxide
0.1 part, 0.1 part of polymethyl acyloxyethyl trimethyl ammonium chloride, 19.8 parts of ammonium sulfate solution.
Preparation method includes the following steps:
(1) a certain amount of propylene is added in the reaction vessel equipped with condenser pipe, nitrogen conduit, thermometer and agitating device
Amide, MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, acrylic acid, ammonium sulfate, polymethyl acyloxyethyl trimethyl ammonia chloride
Ammonium and deionized water, constant speed stirs, dissolves raw material sufficiently in water bath with thermostatic control, stirs evenly；
(2) after leading to nitrogen deoxygenation half an hour, initiator tert-butyl hydroperoxide is added for the first time.System is in nitrogen protection
After lower reaction 2 hours, second of addition initiator tert-butyl hydroperoxide reacts 11 hours, finally obtains low apparent viscosity
Dispersion emulsion, the as described instant water-in-water emulsion friction reducer.
Test example 1
It is tested as follows for optional 3 groups in above-mentioned five groups of embodiments:
Instant water-in-water emulsion friction reducer described in this test selection embodiment 1, embodiment 2 and embodiment 5；
A group will be set as with instant water-in-water emulsion friction reducer according to shale gas fracturing fluid made from embodiment 1；
B group will be set as with instant water-in-water emulsion friction reducer according to shale gas fracturing fluid made from embodiment 2；
C group will be set as with instant water-in-water emulsion friction reducer according to shale gas fracturing fluid made from embodiment 5；
It extracts 10 batches respectively from A group, B group, C group, carries out solubility test and viscosity test, obtained result such as following table institute
Show:
1 solution rate comparison table of table
As can be seen from the above table, shale gas fracturing fluid of the present invention is all had with instant water-in-water emulsion friction reducer
Faster solution rate, wherein when rubbing for the acrylamide of addition, MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride and acrylic acid
When you are than being ratio described in embodiment 5, solution rate is most fast.
The 2. friction reducer viscosity results table of comparisons of table
As can be seen from the above table, shale gas fracturing fluid of the present invention water-in-water emulsion friction reducer, viscosity are located
In in the optimum viscosity range 1.6-1.8mpas of friction reducer, wherein acrylamide, methylacryoyloxyethyl when addition
When the molar ratio of trimethyl ammonium chloride and acrylic acid is ratio described in embodiment 5, viscosity is most appropriate.
Test example 2
A group: 10 batches are chosen according to the instant water-in-water emulsion friction reducer of shale gas fracturing fluid made from embodiment 5；
B group: choose 10 batches according to preparation method described in embodiment 5, but by polymerization temperature be changed to 40 DEG C made from page
The instant water-in-water emulsion friction reducer of rock gas fracturing fluid；
C group: 10 batches are chosen according to preparation method described in embodiment 5, but by the polymethyl acyloxyethyl three of addition
The concentration of ammonio methacrylate is changed to shale gas fracturing fluid made from 0.10g/g with instant water-in-water emulsion friction reducer；
D group: 10 batches are chosen according to preparation method described in embodiment 5, but by the polymethyl acyloxyethyl three of addition
The concentration of ammonio methacrylate is changed to shale gas fracturing fluid made from 0.25g/g with instant water-in-water emulsion friction reducer；
Above-mentioned A group, B group, C group, D group are subjected to viscosity test respectively, obtained result is as shown in the table:
3. 4 groups of solution viscosity comparison tables of table
As can be seen from the above table, the preparation of the instant water-in-water emulsion friction reducer of shale gas fracturing fluid of the present invention
Method changes certain conditions therein, will affect the viscosity of friction reducer, such as: as described in B group, other reaction conditions are constant, only
Polymerization temperature is reduced, friction reducer viscosity can be increased to a certain extent；As described in C group, other reaction conditions are constant, only reduce poly-
The concentration of MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride can increase friction reducer viscosity to a certain extent；As described in D group,
His reaction condition is constant, only increases the concentration of polymethyl acyloxyethyl trimethyl ammonium chloride, can reduce to a certain extent
Friction reducer viscosity.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
It is any to be familiar with those skilled in the art within the technical scope of the present disclosure, according to the technique and scheme of the present invention and its send out
Bright design is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (8)
1. a kind of instant water-in-water emulsion friction reducer of shale gas fracturing fluid, it is characterised in that: the group including following parts by weight
Part: 45-70 parts of acrylamide, 1-30 parts of MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, 1-30 parts of acrylic acid, t-butyl peroxy
Hydrogen 0.01-0.3 parts of change, 0.01-0.3 parts of polymethyl acyloxyethyl trimethyl ammonium chloride, 1-35 parts of ammonium sulfate solution.
2. the instant water-in-water emulsion friction reducer of shale gas fracturing fluid according to claim 1, it is characterised in that: including with
The component of lower parts by weight: 50-65 parts of acrylamide, 5-25 parts of MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, acrylic acid 5-
25 parts, 0.05-0.25 parts of tert-butyl hydroperoxide, 0.05-0.25 parts of polymethyl acyloxyethyl trimethyl ammonium chloride, sulfuric acid
1-30 parts of aqueous ammonium.
3. the instant water-in-water emulsion friction reducer of shale gas fracturing fluid according to claim 2, it is characterised in that: including with
The component of lower parts by weight: 60 parts of acrylamide, 10 parts of MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, 10 parts of acrylic acid, uncle
0.1 part of butylhydroperoxide, 0.1 part of polymethyl acyloxyethyl trimethyl ammonium chloride, 19.8 parts of ammonium sulfate solution.
4. a kind of preparation side of the instant water-in-water emulsion friction reducer of the described in any item shale gas fracturing fluids of claim 1-3
Method, comprising:
(1) a certain amount of acryloyl is added in the reaction vessel equipped with condenser pipe, nitrogen conduit, thermometer and agitating device
Amine, MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, acrylic acid, ammonium sulfate, polymethyl acyloxyethyl trimethyl ammonium chloride
And deionized water, constant speed stirs, dissolves raw material sufficiently in water bath with thermostatic control, stirs evenly；
(2) after leading to nitrogen deoxygenation half an hour, initiator tert-butyl hydroperoxide is added for the first time, system is anti-under nitrogen protection
After answering 2 hours, second of addition initiator tert-butyl hydroperoxide reacts 11 hours, finally obtains the dispersion of low apparent viscosity
Lotion, the as described instant water-in-water emulsion friction reducer.
5. the shale gas fracturing fluid according to claim 4 preparation method of instant water-in-water emulsion friction reducer, feature
Be: the temperature of the water bath with thermostatic control in the step (1) is 50 DEG C.
6. the shale gas fracturing fluid according to claim 4 preparation method of instant water-in-water emulsion friction reducer, feature
It is: the polymethyl acyloxyethyl trimethyl ammonium chloride in the step (1), concentration 0.16g/g.
7. the shale gas fracturing fluid according to claim 4 preparation method of instant water-in-water emulsion friction reducer, feature
It is: the molar ratio of the acrylamide, MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride and acrylic acid that are added in the step (1)
For 8:1:1.
8. the shale gas fracturing fluid according to claim 4 preparation method of instant water-in-water emulsion friction reducer, feature
Be: in the step (2), the concentration for the initiator tert-butyl hydroperoxide that the first time is added is 1 × 10-4G/g, it is described
The concentration of second of initiator tert-butyl hydroperoxide being added is 1.33 × 10-4g/g。
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| CN109971454A (en) * | 2019-05-10 | 2019-07-05 | 四川洁能锐思石油技术有限公司 | A kind of instant crosslinked fracturing fluid system of modified ethylene glycol and its preparation method and application |
| CN109971454B (en) * | 2019-05-10 | 2020-05-15 | 四川洁能锐思石油技术有限公司 | Modified ethylene glycol-based instant fracturing fluid system and preparation method and application thereof |
| CN116239722A (en) * | 2022-12-27 | 2023-06-09 | 中国石油大学(华东) | Variable viscosity double-aqueous-phase polymer for deep shale fracturing and preparation method thereof |
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