CN109265605A - A kind of low adsorption salt tolerant friction reducer suitable for shale reservoir fracturing reform - Google Patents
A kind of low adsorption salt tolerant friction reducer suitable for shale reservoir fracturing reform Download PDFInfo
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- CN109265605A CN109265605A CN201811418674.8A CN201811418674A CN109265605A CN 109265605 A CN109265605 A CN 109265605A CN 201811418674 A CN201811418674 A CN 201811418674A CN 109265605 A CN109265605 A CN 109265605A
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- 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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- 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
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- 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
- C09K8/602—Compositions for stimulating production by acting on the underground formation containing surfactants
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- 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
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Abstract
The invention discloses a kind of low adsorption salt tolerant friction reducers suitable for shale reservoir fracturing reform, are made of the raw material of following mass percent: non-ionic monomer 35~50%, salt tolerant cationic monomer 8~18%, low adsorption cationic monomer 2~5%, nonpolar solvent 15~25%, emulsifier 0.7~5.5%, emulsion adjuvant 6~12%, phase inversion agent 0.2~2.5%, initiator 0.002~0.15%, surplus are deionized water.Non-ionic monomer is N, one of N- dimethacrylamide, hydroxyethyl methacrylate, lauryl methacrylate, methacrylic acid cetyl ester or at least two mixture.Salt tolerant cationic monomer is the mixture of dimethyl diallyl ammonium chloride or methacrylic N, N-dimethylamino ethyl ester or both.Low adsorption cationic monomer is the quaternary ammonium salt containing polar group.Friction reducer of the invention has the characteristics that salt tolerant and low adsorption, the slippery water prepared with friction reducer, small in the adsorbance of shale surface, injures to shale reservoir small.
Description
Technical field
The present invention relates to oil and gas reservoir fracture technology field, in particular to a kind of low adsorption salt tolerant friction reducer is applicable in
In the extensive hydraulic fracturing transformation of shale reservoir.
Background technique
Shale reservoir has low hole, hypotonic feature, needs to carry out extensive hydraulic fracturing transformation and is just able to satisfy commercial mining
It is required that.Using big liquid measure, huge discharge as main feature, single hop liquid measure is more than 2000m for extensive hydraulic fracturing3, discharge capacity is more than 10m3/
Min needs fracturing fluid to have Low Damage, strong resistance-reducing performance.
Conventional guanidine gum fracturing fluid is more than 30% to the permeability damage rate of reservoir matrix, seriously affects effect of increasing production.Meanwhile
Large discharge pump note bring high speed shear can seriously affect the drop resistance of guanidine gum fracturing fluid, increasing stick performance, easily cause seam it is difficult,
The construction problems such as sand fallout.Thus, shale reservoir fracturing reform generallys use slippery water fracturing fluid, (general to use with friction reducer
Polyacrylamide polymer) it is host agent, have the characteristics that viscosity is low, small to reservoir damage, resistance-reducing performance is good, by high discharge capacity
Keep the ability of conveying proppant.
Shale reservoir fracturing reform slippery water fracturing fluid dosage is big, and lifting rate is returned after pressure and is increased therewith, " does not land, zero dirt
The environmental requirement of dye " proposes baptism to the processing for returning drain after shale reservoir pressure.Most effective processing method is at present
Exploitation adapts to the friction reducer that drain salinity is returned after pressing, and preparation slippery water fracturing fluid in drain is returned in friction reducer addition, is used for down
One stage pressing crack construction reduces clear water consumption so that drain is returned in recycling, the mesh for reaching protection environment, reducing development cost
's.
Conventional friction reducer anti-salt property is poor, under being added into the slippery water fracturing fluid resistance-reducing performance for returning and preparing in drain substantially
Drop is unable to satisfy the pressing crack construction demand that high salinity returns drain recycling.106590614 A of related patents CN is disclosed
A kind of Instant salt tolerant friction reducer, in 0.05% dosage, resistance-reducing yield can reach the friction reducer in the salt water of 30000ppm
70% or more, however the resistance-reducing yield under more high-salinity brine is not referred to.103333672 A of CN discloses low point a kind of
Application of the son amount cationic polyacrylamide friction reducer in shale gas reservoir concentrated water.107057675 A of CN discloses one
Kind is suitable for the high salt tolerant reversed-phase emulsion friction reducer of shale reservoir fracturing reform, high salinity of the friction reducer in 100000ppm
Resistance-reducing yield has good salt resistant character up to 75.8% in salt water.The salinity that the friction reducer of existing open report is applicable in is most
Big value is only 100000ppm, and the salinity for implementing fracturing outlet liquid is usually more than 100000ppm, it is therefore desirable to which research and development are fitted
With the bigger friction reducer of salinity range.
Meanwhile friction reducer passes through chemical bond, hydrogen bond action or electrostatic interaction in rock fracture wall surface and base in shale surface
Occur Adsorption And Retention in matter hole, currently used anionic polyacrylamide class friction reducer shale surface large amount of adsorption in
5mg/g, Adsorption And Retention injure the Efficient Development for seriously affecting shale gas.Therefore, the absorption property of friction reducer directly affects sliding
Water fracturing fluid is slipped to the extent of injury of shale reservoir.
Summary of the invention
The purpose of the present invention is the salt resistant character for existing friction reducer is poor, large amount of adsorption of the friction reducer in shale surface
Technical problem provides a kind of few in shale surface adsorbance, and the friction reducer that salt resistant character is excellent.
To achieve the goals above and further advantage, the present invention provides a kind of suitable for the low of shale reservoir fracturing reform
Salt tolerant friction reducer is adsorbed, which is made of the raw material components of following mass percent:
Non-ionic monomer 35~50%, salt tolerant cationic monomer 8~18%, low adsorption cationic monomer 2~5%, non-pole
Property solvent 15~25%, emulsifier 0.7~5.5%, emulsion adjuvant 6~12%, phase inversion agent 0.2~2.5%, initiator 0.002
~0.15%, surplus is deionized water.
Wherein, the non-ionic monomer is one of acrylate, acrylamide and its derivative or at least two
Mixture.Preferably, the non-ionic monomer is N,N-DMAA, hydroxyethyl methacrylate, metering system
One of sour lauryl, methacrylic acid cetyl ester or at least two mixture.
The salt tolerant cationic monomer is dimethyl diallyl ammonium chloride or methacrylic N, N-dimethylamino second
The mixture of ester or both.
The low adsorption cationic monomer is the quaternary ammonium salt containing polar group.Preferably, the low adsorption cation
Monomer is the quaternary ammonium salt containing the chain alkyl for adulterating oxygen in acrylyl oxy-ethyl, ethoxy or carbochain in molecular structure.
It may further be preferable that the low adsorption cationic monomer be acryloxyethyldimethyl hydroxyethyl ammonium chloride,
Methylacryoyloxyethyl dimethyl 3,6- dioxaheptyl ammonium chloride, methylacryoyloxyethyl dimethyl hydroxyethyl ammonium chloride
One of or at least two mixture.
The nonpolar solvent is atoleine.
The emulsifier is sorbitan stearate, sorbitan mono-oleic acid ester, sorbitan trioleate, polyoxyethylene
Sorbitan monostearate, Tween-80, one in polyoxyethylene 20 sorbitan trioleate
Kind or at least two mixing.
The emulsion adjuvant is one of n-butanol, n-amyl alcohol, n-hexyl alcohol, n-nonyl alcohol, laruyl alcohol or at least two
Mixture.
The phase inversion agent is nonylphenol polyoxyethylene ether, in fatty alcohol polyoxyethylene ether, more octyl phenol polyoxyethylene ether
It is a kind of or at least two mixture.
The initiator be sodium thiosulfate, ammonium persulfate, sodium hydrogensulfite, azo dicyclohexyl formonitrile HCN hydrochloride,
One of azo diisobutyl imidazoline hydrochloride, azo dicyano valeric acid or at least two mixture.
Above-mentioned each raw material component is mixed, stirring at normal temperature, it is uniform, stable to get arriving that each raw material component is caused polymerization
Low adsorption salt tolerant friction reducer.
Compared with prior art, the invention has the following advantages:
(1) low adsorption cationic monomer and salt tolerant cationic monomer are introduced in friction reducer of the invention.Pass through adsorption machine
Reason is studies have shown that rely primarily on hydrogen bond and electrostatic interaction, therefore design synthesis based on cation between friction reducer and rock sample
Modified friction reducer molecule.Contain acyl-oxygen in low adsorption cationic monomer molecular structure, ethoxy isopolarity group increases drop
Polar sites in resist on polymer segment form and more increase so that the hydrogen bond action between molecule segment further enhances
Orderly network structure is spent, which not only improves the salt resistant characters of friction reducer, and also make the cofree polar sites of segment tail off,
The possibility for acting on polar sites on rock sample and forming hydrogen bond is reduced, and then substantially reduces friction reducer adsorbance.Therefore, pass through
Addition low adsorption cation mono physical efficiency effectively reduces the electrostatic interaction between polymer and rock sample；So that effect between segment is into one
Step enhancing, forms the network structure of more high-sequential, can not only improve the salt resistant character of friction reducer, moreover it is possible to reduction and rock
Polar sites act on the possibility to form hydrogen bond on sample, so that friction reducer adsorbance substantially reduces.
(2) it is only in the adsorbance of shale surface with the slippery water (friction reducer dosage 0.1%) that friction reducer of the present invention is prepared
0.125mg/g injures shale reservoir small.Friction reducer is added in the salt water that salinity is 300000ppm and prepares slippery water,
It is 3.66mg/g in the adsorbance of shale surface.And conventional anion polyacrylamide friction reducer is added in deionized water and is matched
Slippery water processed is 5.49mg/g in the adsorbance of shale surface.It is indicated above that friction reducer of the invention has excellent low suction
Attached performance, and still there is low adsorption feature with the slippery water for returning drain preparation, to substantially reduce slippery water to shale reservoir
Absorption injury.
(3) friction reducer is added in the salt water that salinity is 200000ppm and prepares slippery water (friction reducer dosage 0.1%),
Slippery water resistance-reducing yield reaches 67.84%, shows that friction reducer salt resistant character is excellent, shale reservoir fracturing reform can be added in friction reducer
Slippery water is prepared in returning afterwards in drain, met drop resistance and required, so that reusable return drain, reduce environmental pollution.
(4) two kinds of characteristics of low adsorption, salt tolerant based on friction reducer of the present invention, the smooth hydraulic pressure prepared using the friction reducer
Liquid is split while carrying out shale reservoir fracturing reform, effective protection reservoir and can reuse returning after fracturing reform
Drain, effectively solves the problems, such as to return that drain processing difficulty, environmental pollution is serious.
Further advantage, target and feature of the invention will be partially reflected by the following instructions, and part will also be by this
The research and practice of invention and be understood by the person skilled in the art.
Detailed description of the invention
Fig. 1 is resistance-reducing yield of the different dosage friction reducer products in clear water.
Fig. 2 is viscosity of the friction reducer in different salinity salt water.
Fig. 3 is resistance-reducing yield of the friction reducer in different salinity salt water.
Fig. 4 is adsorbance of the friction reducer in different salinity salt water.
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art referring to specification text
Word can be implemented accordingly.
Embodiment 1
A kind of low adsorption salt tolerant friction reducer suitable for shale reservoir fracturing reform presses quality percentage by following raw material components
Than composition:
Acrylamide 35%, dimethyl diallyl ammonium chloride 10%, methylacryoyloxyethyl dimethyl hydroxy ethyl chlorine
Change ammonium 2%, atoleine 20%, sorbitan mono-oleic acid ester 5.5%, n-hexyl alcohol 10%, nonylphenol polyoxyethylene ether 2%, sulphur
Sodium thiosulfate 0.1%, deionized water 15.4%.
Above-mentioned raw materials are mixed, after initiated polymerization, obtain uniform, stable low adsorption salt tolerant friction reducer.
The friction reducer is added in clear water, control respectively friction reducer mass percent in water be 0.025%, 0.05%, 0.1%,
0.15%, 0.2%, 0.25%.Fig. 1 is resistance-reducing yield of the different dosage friction reducers in clear water.The friction reducer has in clear water
Good resistance-reducing performance, resistance-reducing yield is in first to increase the trend reduced afterwards with the increase of friction reducer dosage, in friction reducer dosage
Up to 70% or more when 0.05%, when friction reducer dosage 0.1%, there is optimal resistance reducing effect, resistance-reducing yield is reachable
75.47%.
Embodiment 2
A kind of low adsorption salt tolerant friction reducer suitable for shale reservoir fracturing reform presses quality percentage by following raw material components
Than composition:
Mixture 35%, the dimethyl diallyl that acrylamide and hydroxyethyl methacrylate are mixed by weight 1:1
Mixture 10%, the methacryloxypropyl that ammonium chloride and methacrylic N, N-dimethylamino ethyl ester are mixed by weight 1:3
The mixture that ethyl dimethyl hydroxyethyl ammonium chloride and acryloxyethyldimethyl hydroxyethyl ammonium chloride are mixed by weight 2:3
3%, atoleine 24%, sorbitan mono-oleic acid ester and Tween-80 are mixed by weight 2:1
Mixture 10% that mixture 0.8%, n-hexyl alcohol and n-nonyl alcohol are mixed by weight 2:3, nonylphenol polyoxyethylene ether 0.5%,
Azo dicyclohexyl formonitrile HCN hydrochloride 0.05%, deionized water 16.65%.
Above-mentioned raw materials are mixed, after initiated polymerization, obtain uniform, stable low adsorption salt tolerant friction reducer.
It is measured through Ubbelohde viscometer, when friction reducer dosage is 0.1% (mass percent), is with the slippery water viscosity that clear water is prepared
4.7mPa·s；It keeps friction reducer dosage constant, is prepared in the sodium chloride brine of 200000ppm, viscosity is
1.36mPas, resistance-reducing yield reach 67.31%.The friction reducer is prepared in clear water (friction reducer dosage 0.1%), in shale
Surface excess is 0.718mg/g.
Embodiment 3
A kind of low adsorption salt tolerant friction reducer suitable for shale reservoir fracturing reform presses quality percentage by following raw material components
Than composition:
The mixture of the weight ratio such as acrylamide, hydroxyethyl methacrylate, lauryl methacrylate three mixing
35%；
Dimethyl diallyl ammonium chloride and methacrylic N, N-dimethylamino ethyl ester mix mixed by weight 1:3
Close object 18%；
Methylacryoyloxyethyl dimethyl hydroxyethyl ammonium chloride, methylacryoyloxyethyl dimethyl 3,6- dioxa heptan
The mixture 3% that ammonium chloride is mixed with weight ratio 2:1；
Atoleine 25%；
Sorbitan mono-oleic acid ester, sorbitan trioleate are with the mixture 0.8% of weight ratio 1:3；
N-hexyl alcohol, n-nonyl alcohol, laruyl alcohol are with the mixture 12% of weight ratio 3:3:1；
Nonylphenol polyoxyethylene ether, more octyl phenol polyoxyethylene ether are with the mixture 0.2% of weight ratio 5:6；
Azo dicyclohexyl formonitrile HCN hydrochloride, azo diisobutyl imidazoline hydrochloride are with the mixture of weight ratio 1:2
0.1%；Surplus is deionized water.
The summation of each component mass percent is 100%.
Above-mentioned raw materials are mixed, stirring at normal temperature, polymerization reaction occurs, obtains uniform, stable low adsorption salt tolerant friction reducer.
It is measured through Ubbelohde viscometer, when friction reducer dosage is 0.1% (mass percent), is with the slippery water viscosity that clear water is prepared
4.7mPa·s；It keeps friction reducer dosage constant, is prepared in the sodium chloride brine of 200000ppm, testing its viscosity is
1.5mPas, and resistance-reducing yield reaches 71.18%, which is prepared dosage 0.1% in clear water, inhales in shale surface
Attached amount is 0.225mg/g.
Embodiment 4
A kind of low adsorption salt tolerant friction reducer suitable for shale reservoir fracturing reform presses quality percentage by following raw material components
Than composition:
Acrylamide 35%, methacrylic N, N-dimethylamino ethyl ester 8%, acryloxyethyldimethyl ethoxy
Ammonium chloride 5%, atoleine 20%, ethylene oxide sorbitan monostearate 1%, n-amyl alcohol 6%, more octylphenol polyethylene ethylene oxides
Ether 2.5%, azo dicyclohexyl formonitrile HCN hydrochloride 0.005%, surplus are deionized water.The summation of each component mass percent
It is 100%.
Above-mentioned raw materials are mixed, stirring at normal temperature, polymerization reaction occurs, obtains uniform, stable low adsorption salt tolerant friction reducer.
It is measured through Ubbelohde viscometer, the friction reducer synthesized by above-mentioned raw materials is when dosage is 0.1%, with the slippery water viscosity of clear water preparation
For 5.2mPas.As shown in Fig. 2, there is sharp fall in viscosity, and its resistance-reducing yield remains in high-salinity brine
65% or more (see Fig. 3).Therefore, the friction reducer salt resistant character is good, the row of returning after being added into shale reservoir fracturing reform
Slippery water is prepared in liquid, so that drain is returned in recycling, is reduced environmental pollution.
Embodiment 5
A kind of low adsorption salt tolerant friction reducer suitable for shale reservoir fracturing reform presses quality percentage by following raw material components
Than composition:
Hydroxyethyl methacrylate 50%, methacrylic N, N-dimethylamino ethyl ester 8%, methylacryoyloxyethyl
Dimethyl 3,6- dioxaheptyl ammonium chloride 2%, atoleine 15%, sorbitan stearate 0.8%, n-butanol 10%, rouge
Fat alcohol polyoxyethylene ether 1%, sodium thiosulfate 0.15%, surplus are deionized water.The summation of each component mass percent is
100%.
Above-mentioned raw materials are mixed, stirring at normal temperature, polymerization reaction occurs, obtains uniform, stable low adsorption salt tolerant friction reducer.
Friction reducer in clear water dosage be 0.1% (mass percent) when, be only 0.125mg/g in shale surface adsorbance.Keeping should
Friction reducer dosage is constant, is added into high-salinity brine, the adsorbance under measuring it in different salinity salt water, as a result
See Fig. 4.As can be seen that friction reducer is in increased trend in the adsorbance of shale surface as salinity increases.?
In the salt water of 300000ppm, adsorbance reaches 3.66mg/g, still less than common friction reducer shale surface adsorbance.The drop
Resist has excellent low absorbability energy, and still has low adsorption feature with the slippery water fracturing fluid for returning drain preparation, thus
Slippery water fracturing fluid is substantially reduced to injure the absorption of shale reservoir.
In conclusion friction reducer of the invention has both the characteristics of low adsorption and salt tolerant, existed with the slippery water that friction reducer is prepared
The adsorbance of shale surface can injure shale reservoir small down to 0.125mg/g.Meanwhile friction reducer salt resistant character is excellent, by it
It is added in the salt water that salinity is 200000ppm and prepares slippery water, slippery water resistance-reducing yield reaches 67.84%.It is indicated above that can be with
Returning after friction reducer addition shale reservoir fracturing reform is prepared into slippery water in drain, so that drain is returned in recycling, reduces ring
Border pollution.The slippery water fracturing fluid prepared using the friction reducer, can effective protection storage when carrying out shale reservoir fracturing reform
Layer, and can reuse and return drain after fracturing reform, effectively solve the problem of to return drain processing difficulty that environmental pollution is serious.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With.It can be applied to various suitable the field of the invention completely.It for those skilled in the art, can be easily
Realize other modification.Therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and legend shown and described herein.
Claims (10)
1. a kind of low adsorption salt tolerant friction reducer suitable for shale reservoir fracturing reform, which is characterized in that by following quality percentage
The raw material of ratio is made:
Non-ionic monomer 35~50%, salt tolerant cationic monomer 8~18%, low adsorption cationic monomer 2~5%, nonpolarity are molten
Agent 15~25%, emulsifier 0.7~5.5%, emulsion adjuvant 6~12%, phase inversion agent 0.2~2.5%, initiator 0.002~
0.15%, surplus is deionized water；
The salt tolerant cationic monomer be dimethyl diallyl ammonium chloride or methacrylic N, N-dimethylamino ethyl ester or
The mixture of the two；
The low adsorption cationic monomer is the quaternary ammonium salt containing polar group.
2. being suitable for the low adsorption salt tolerant friction reducer of shale reservoir fracturing reform as described in claim 1, which is characterized in that institute
Stating low adsorption cationic monomer is in molecular structure containing the chain alkyl for adulterating oxygen in acrylyl oxy-ethyl, ethoxy or carbochain
Quaternary ammonium salt.
3. being suitable for the low adsorption salt tolerant friction reducer of shale reservoir fracturing reform as claimed in claim 2, which is characterized in that institute
Stating low adsorption cationic monomer is acryloxyethyldimethyl hydroxyethyl ammonium chloride, methylacryoyloxyethyl dimethyl 3,6-
One of dioxaheptyl ammonium chloride, methylacryoyloxyethyl dimethyl hydroxyethyl ammonium chloride or at least two mixing
Object.
4. being suitable for the low adsorption salt tolerant friction reducer of shale reservoir fracturing reform as described in claim 1, which is characterized in that institute
State the mixture that non-ionic monomer is one of acrylate, acrylamide and its derivative or at least two.
5. being suitable for the low adsorption salt tolerant friction reducer of shale reservoir fracturing reform as claimed in claim 4, which is characterized in that institute
Stating non-ionic monomer is N, N- dimethacrylamide, hydroxyethyl methacrylate, lauryl methacrylate, methacrylic acid
One of cetyl ester or at least two mixture.
6. being suitable for the low adsorption salt tolerant friction reducer of shale reservoir fracturing reform as described in claim 1, which is characterized in that institute
Stating nonpolar solvent is atoleine.
7. being suitable for the low adsorption salt tolerant friction reducer of shale reservoir fracturing reform as described in claim 1, which is characterized in that institute
Stating emulsifier is sorbitan stearate, sorbitan mono-oleic acid ester, sorbitan trioleate, polyoxyethylene sorbitol acid anhydride list
One of stearate, Tween-80, polyoxyethylene 20 sorbitan trioleate or at least two
The mixing of kind.
8. being suitable for the low adsorption salt tolerant friction reducer of shale reservoir fracturing reform as described in claim 1, which is characterized in that institute
State the mixture that emulsion adjuvant is one of n-butanol, n-amyl alcohol, n-hexyl alcohol, n-nonyl alcohol, laruyl alcohol or at least two.
9. being suitable for the low adsorption salt tolerant friction reducer of shale reservoir fracturing reform as described in claim 1, which is characterized in that institute
Stating phase inversion agent is one of nonylphenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether, more octyl phenol polyoxyethylene ether or at least
Two kinds of mixture.
10. being suitable for the low adsorption salt tolerant friction reducer of shale reservoir fracturing reform as described in claim 1, which is characterized in that
The initiator is that sodium thiosulfate, ammonium persulfate, sodium hydrogensulfite, azo dicyclohexyl formonitrile HCN hydrochloride, azo two are different
One of butyl imidazole quinoline hydrochloride, azo dicyano valeric acid or at least two mixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811418674.8A CN109265605B (en) | 2018-11-26 | 2018-11-26 | Low-adsorption salt-resistant resistance-reducing agent suitable for shale reservoir fracturing transformation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811418674.8A CN109265605B (en) | 2018-11-26 | 2018-11-26 | Low-adsorption salt-resistant resistance-reducing agent suitable for shale reservoir fracturing transformation |
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| Publication Number | Publication Date |
|---|---|
| CN109265605A true CN109265605A (en) | 2019-01-25 |
| CN109265605B CN109265605B (en) | 2020-12-04 |
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| CN201811418674.8A Active CN109265605B (en) | 2018-11-26 | 2018-11-26 | Low-adsorption salt-resistant resistance-reducing agent suitable for shale reservoir fracturing transformation |
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