CN105399895B - Friction reducer, the drop comprising the friction reducer block water and its apply - Google Patents
Friction reducer, the drop comprising the friction reducer block water and its apply Download PDFInfo
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- CN105399895B CN105399895B CN201410433259.5A CN201410433259A CN105399895B CN 105399895 B CN105399895 B CN 105399895B CN 201410433259 A CN201410433259 A CN 201410433259A CN 105399895 B CN105399895 B CN 105399895B
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Abstract
The present invention provides friction reducer, the drop comprising the friction reducer and blocks water and its apply, and belongs to gas well fracturing reagent field.The friction reducer includes pressing (1~4) by acrylamide, esters monomer A and cationic monomer B:0.5:The inverted emulsion polymerization random copolymerization of mol ratio of (0.5~1) is obtained, wherein described esters monomer A is the carboxylate of specific methacrylic acid and/or acrylic acid and glycerine, the cationic monomer B is pi-allyl trimethyl ammonium chloride or MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, and the viscosity average molecular weigh of gained copolymer is 5 × 105~8 × 105.The resistance-reducing efficiency that drop comprising the friction reducer blocks water is high, and the friction reducer is degradable, so to reservoir fanout free region.
Description
Technical field
Block water and its answer the present invention relates to the friction reducer in a kind of volume increase for gas well fracturing, the drop comprising the friction reducer
With.
Background technology
The unconventional reservoirs such as shale gas, tight gas (unconventional reservoir, unconventional gas well are a kind of sayings risen in recent years,
Be primarily referred to as permeability low reservoir and gas well) have become the focus of oil-gas exploration and development, practice have shown that, tight sand,
The volume fracturing for carrying out discharge capacity extensive, high is needed in the non-conventional gas well development such as shale gas reservoir could realize that benefit is developed.In U.S.
State, volume fracturing is the Main Yield-increasing mode of shale gas reservoir, the construction liquid measure of levels typical well volume fracturing 20000~
30000m3.In Sichuan Changning-Weiyuan national level shale gas demonstration area, a bite vertical well fracture construction liquid measure also 1500~
2500m3, 20000~30000m of horizontal well3.10~14m of operational discharge capacity3/min.High, the cost using conventional fracturing fluid system frictional resistance
Height, the injury to reservoir is big, it is difficult to meets the requirement of unconventional reservoir benefit exploitation, therefore leads in the exploitation of unconventional reservoir
Stimulation work is carried out frequently with the drop fracturing fluid that blocks water, wherein drop blocks water and is also called slippery water.
US2009/0318313 A1 disclose a kind of slippery water formula, by water, poly- propionamide, stabilization peroxide gel breaker, kill
Microbial inoculum, clay stabilizer are constituted, and poly- propionamide concentration is 0.001%~5%, the molecular weight 1 × 10 of poly- propionamide3~2 × 107,
Even more high, peroxide breaker concentration is 0.001%~20%.
Chinese patent literature CN102516975A and CN103275691A disclose a kind of recyclable drop and block water formula, and this is matched somebody with somebody
Side it is important that solve drop block water it is instant, recyclable.
Chinese patent literature CN103045226A discloses a kind of friction reducer and preparation method thereof and uses the friction reducer
The fracturing fluid and preparation method thereof that blocks water drops.
Above prior art solves the problems, such as that dropping the formula that blocks water, instant and drop blocks water and recycle and reuse, but shortcoming exists
In：The block water friction reducer of middle HMW of the drop remained after pressing crack construction cannot be degraded, and reservoir can be caused necessarily to injure.
The content of the invention
Goal of the invention
It is an object of the present invention to provide a kind of friction reducer, resistance reducing effect is good and degradable, to reservoir fanout free region.
Blocked water it is a further object to provide a kind of drop comprising above-mentioned friction reducer, the drop blocks water and is applied to very
Resistance-reducing yield is high during rule gas well, and to reservoir fanout free region.
Another object of the present invention is to provide the application that above-mentioned drop blocks water in the construction of non-conventional gas well volume fracturing.
In the present invention, the unconventional gas well refers to gas well of the permeability less than 0.1mD (millidarcy).
Summary of the invention
The friction reducer, by acrylamide, esters monomer A and cationic monomer B by 1~4):0.5:(0.5~1) rubs
You obtain than inverted emulsion polymerization random copolymerization, wherein the esters monomer A is methacrylic acid and/or acrylic acid and the third three
The carboxylate of alcohol, structural formula is
Wherein, R1, R2 are H or-CH3；
The cationic monomer B is pi-allyl trimethyl ammonium chloride or MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, institute
The viscosity average molecular weigh for obtaining copolymer is 5 × 105~8 × 105。
The mol ratio of preferred acrylamide, esters monomer A and cationic monomer B is (1~2):0.5:(0.5~1).
Preferred inverse emulsion polymerization condition is：Reaction temperature is 63~65 DEG C, and the reaction time is 4~5h, and initiator is
Azo diisobutyl amidine hydrochloride (hereinafter referred to as V50).
Above-mentioned inverse emulsion polymerization reaction gained direct product is acrylamide and esters monomer A, the three of cationic monomer B
The mass percent concentration of membered copolymer emulsion, wherein active ingredient is 25%~40%.The quality percentage of the active ingredient
Specific concentration is multiplied with reaction conversion ratio according to the monomer gross mass for adding and obtains, and the method for testing of the reaction conversion ratio is：Claim
Reacted emulsion is taken to be added in absolute ethyl alcohol or acetone, fully after precipitation after take solid drying and weigh, reaction conversion ratio is
The quality of drying adds the ratio between monomer gross mass with reaction.The copolymer emulsion can be answered directly as friction reducer emulsion
With, it is also possible to applied again after purifying active ingredient therein.When temperature is higher than 70 DEG C, the ester structure of friction reducer is decomposed,
So as to be degraded into small molecule, to reservoir fanout free region, recovery of core permeability is high, while resistance reducing effect is good, comprising the friction reducer
Drop block water resistance-reducing yield up to 73%~78%.
The drop blocks water, comprising above-mentioned friction reducer.It is preferred that the composition for blocking water that drops is included by weight percentage
Friction reducer emulsion 0.02%~0.08%
Transporting agent 0.5%~1%
Wherein, the friction reducer emulsion includes above-mentioned friction reducer, and active ingredient concentration is 25%~40%, described to take sand
Agent is acid fiber by polylactic and/or esters fiber, and the fibre length of the acid fiber by polylactic is 5-12mm, the acid fiber by polylactic
Degradation temperature is 70-120 DEG C；The fibre length of the esters fiber is 5-12mm, and the degradation temperature of the esters fiber is 70-
120℃.More preferably described esters fiber is at least one in ethyl lactate fiber, ethyl acetate fiber, methyl acetate fiber.
Used as further preferred scheme, described drop blocks water to constitute and is by weight percentage
Balance of water.
It is preferred that the mass percent of the friction reducer emulsion is 0.02%~0.05%.
The cleanup additive, expansion-resisting agent, bactericide routinely can select material commonly used in the art by consumption.
Preferably, the mass percent composition of the cleanup additive is：
Balance of water.
The C7-C8 polyoxyethylene-types fluorocarbon surfactant is preferably FC-1010, the C7-C9 fatty alcohols polyoxy second
Alkene ether is preferably peregal o-20.
The expansion-resisting agent is preferably quaternary ammonium salt expansion-resisting agent.More preferably ammonium chloride and/or tetramethyl ammonium chloride.
The bactericide is preferably glutaraldehyde and/or dazomet.
Drop blocks water system using conventional method configuration.The indoor preparation drop block water system when, using mixed tune device, first will drop resistance
Agent is added in mixed tune device, mixing speed 800r/min-1000r/min, is subsequently adding cleanup additive, and expansion-resisting agent, bactericide treat whole
After system stirs, transporting agent is slowly added to, then initial 10s mixing speeds 1000r/min is at the uniform velocity reduced to 800r/
Min, be added to the water stirring 20-60s, drops the system that blocks water uniform.
Above-mentioned drop blocks water and can be used for the construction of non-conventional gas well volume fracturing.
Effect of the invention is
(1) using after transporting agent, network structure is formed in drop blocks water, significantly reduces the sinking speed of proppant, carried
The solid-carrying performance that drop high blocks water；
(2) transporting agent in crack it is degradable returns discharge ground, the flow conductivity in crack is not influenceed after pressure break, to reservoir without
Injury；
(3) other additives have excellent compatibility during transporting agent blocks water with currently preferred drop, and drop is not influenceed
The resistance-reducing performance for blocking water；
(4) drop blocks water and returns discharge opeing repeatable utilization after treatment；
(5) it is high that the resistance-reducing yield that blocks water drops, resistance-reducing yield 73%-78%, when temperature is higher than 70 DEG C, friction reducer is degraded into small point
Son, to reservoir fanout free region, recovery of core permeability is high；
(6) friction reducer can apply to salinity less than or equal to 2 × 105In the concentrated water of mg/L.
Brief description of the drawings
Fig. 1 is that the volume fracturing of embodiment 1 returns the drop prepared after discharge opeing treatment and blocks water and newly prepare drop and block water resistance-reducing performance pair
Than figure.
Specific embodiment
Hereinafter the present invention will further be illustrated by specific embodiment.
Involved method of testing and processing method are as follows in following examples：
Viscosity average molecular weigh method of testing：With reference to GB/T 265-88 test methods, the kinematic viscosity of liquid, Ran Houjing are measured
It is calculated molecular weight.This method is that under a certain stationary temperature, the liquid for determining certain volume flows through one under gravity
The time of the glass capillary tube viscometer demarcated, the capillary constant of viscosimeter and the product of flowing time, the as temperature
The lower kinematic viscosity for determining liquid.
Kinematic viscosity method of testing：With reference to the Viscosity Measurement Methods of GB/T 10247, the kinematic viscosity of liquid, test temperature are measured
30 DEG C of degree.
Static sand setting assay method is to block water to be positioned in static sand sediment pipe by the drop that will prepare of formula, treats static sand setting
Drop in pipe blocks water after being warmed up to 95 DEG C, adds 40-70 purposes to grasp positive ceramsite propping agent, records the settling height of 1min proppants
Draw sinking speed.
Resistance-reducing yield assay method：According to Chinese patent ZL01320092441X《A kind of pressure break liquid pipeline frictional resistance determines device》
Described device and method carry out following test：The desired amount of clear water of test is added in fluid reservoir is circulated, kinetic pump is slowly adjusted
Rotating speed, make entirely to test pipeline full of test liquid.Temperature control heating system is opened, test temperature is set, motivation of adjustment pump turns
Speed reaches setting linear velocity or Reynolds number, after the temperature reading in discharge capacity and temperature detector on fluid flowmeter is stable,
The pressure difference of clear water under the linear velocity or Reynolds number is read from computer.Then blocked water according to identical program test drop and flow through the pipeline
Pressure difference.Test temperature can use room temperature or drop the temperature in use that blocks water, tubing internal diameter >=8mm during experiment, and indoor linear velocity >=
10m/s (Reynolds number >=80000, shear rate >=10000).According to SY/T5107-2005《Aqueous fracturing fluid performance evaluation side
Method》It is calculated resistance-reducing yield.
Recovery of core permeability method of testing：Reference standard SY/T5107-2005《Aqueous fracturing fluid performance evaluation》.
Return discharge opeing processing method：Return discharge opeing from well head out after, into regulating reservoir, as needed can be pre- in regulating reservoir
First add pH adjusting agent, bactericide etc..Subsequently enter the high-valency metal sun that retort is returned in discharge opeing using chemical precipitation method removal
Ion (calcium, magnesium, iron etc.), then makes sediment and suspended solid is agglomerating, rapid subsidence with flucculation process.Refilter separation and return row
Suspended solid and water phase in liquid.Discharge opeing of returning after filtering is stored in water tank, if after testing on drop block-water performance without influence,
Can direct reuse without scaling tendency.
Raw materials used producer is as follows with model in following examples：
Glycerol dimethacrylate：Shanghai one chemical reagent work of purple, purity 90%
AEO peregal o-20：Purchased from Jiangsu Hai'an petrochemical plant
Octanol：Purchased from Qilu Petrochemical
Fluorocarbon surfactant FC-1010：Purchased from Qingdao Ke Mo Chemical Co., Ltd.s
EDETATE SODIUM (disodium ethylene diamine tetraacetate)：Chengdu Cologne chemical reagent factory, analyzes pure
Initiator V50：Chemical Reagent Co., Ltd., Sinopharm Group, analyzes pure
Span-80 (sorbitan monooleate)：Chengdu Cologne chemical reagent factory, analyzes pure
Span-85 (sorbitan trioleate)：Zhejiang Province Long Youxian gathers emerging grain and oil medication chemistry Co., Ltd
(embodiment 1)
On the basis of the raw material gross mass for participating in inverse emulsion polymerization, friction reducer emulsion is synthesized by step in detail below：
1) preparation of water phase：By 40.17g glycerol dimethacrylates, 47.73g pi-allyls trimethyl ammonium chloride, 25g
Acrylamide is dissolved in distilled water water, and adds 0.15gEDTA disodiums, and 0.045g initiator V50 are added before emulsification, and dissolving is equal
It is even.
2) preparation of oil phase：Weigh white oil 64g and emulsifying agent Span-80 (4%, 12.8g), the span85 of mass ratio 20%
(1%, 3.2g).
3) emulsify：Water phase, mixing speed during dropwise addition is added dropwise under the conditions of logical essence nitrogen (i.e. purity is 99.99% nitrogen)
2000r/min, time for adding is 65-75min.30min is stirred for after completion of dropping.
4) react：Control programming rate, is warmed up to 63~65 DEG C, and 4~5h of reaction stops reaction.
Take 495.125ml distilled water to be placed in the mixed tune device of 1000ml volumes, sequentially add 0.35g friction reducers emulsion (altogether
Polymers molecular weight 550,000, glycerol dimethacrylate：Pi-allyl trimethyl ammonium chloride：Acrylamide=0.5:1:1, effectively into
Divide concentration 33.8%), mixing speed 800r/min stirs 10s, and (mass percent is constituted to add 1g cleanup additives：1% fluorine
The peregal o-20+84.4% distilled water of+3.8% octanol of carbon surface active agent FC-1010+0.8% butyl glycol ethers+10%),
0.025g bactericide (mixture of the dazomet of 50% glutaraldehyde+50%), 0.5g tetramethyl ammonium chlorides are eventually adding 2.5g PLAs
Fiber (fibre length：7mm, 100 DEG C of degradation temperature), then initial 10s mixing speeds 1500r/min is slowly lowered to 800r/
Min, stirring 20s be well mixed to be made drop and blocks water.
Test result：The kinematic viscosity that drop blocks water is 2.3mm2/ s, drop block water resistance-reducing yield 78% (normal temperature, caliber 8mm,
Linear velocity 10m/s), block water static sand setting speed 0.1mm/s, recovery of core permeability 99.8% drop.
Above-mentioned drop is blocked water after Changning-Weiyuan national level shale gas demonstration area application and construction, to returning discharge opeing (kinematic viscosity
It is 0.73mm2/ s, salinity 4.2 × 105Mg/L) processed.Return discharge opeing and pH adjusting agent NaOH is added in regulating reservoir
(0.5%), citric acid (1%), bactericide glutaraldehyde (0.1%) carries out initial stage treatment to returning discharge opeing；Subsequently enter retort profit
The high valent cationic (calcium, magnesium etc.) returned in discharge opeing is removed with sodium carbonate, then makes to sink with the poly- propionamide flocculant of anion
Starch and suspended solid is agglomerating, rapid subsidence, refilters removal suspended solid.With after treatment return discharge opeing replace formula in
Water, is configured to drop and blocks water by original formulation, resistance-reducing yield 78% (normal temperature, caliber 8mm, linear velocity 10m/s).
(embodiment 2)
On the basis of the raw material gross mass for participating in inverse emulsion polymerization, friction reducer emulsion is synthesized by step in detail below：
1) preparation of water phase：By 40.17g glycerol dimethacrylates, 23.87g pi-allyls trimethyl ammonium chloride,
37.53g acrylamides are dissolved in distilled water water, and add 0.15gEDTA disodiums, and 0.05g initiator V50 are added before emulsification,
It is uniformly dissolved.
2) preparation of oil phase：Weigh the white oil 64g of mass ratio 20% and emulsifying agent Span-80 (4%, 12.8g), span85
(1%, 3.2g).
3) emulsify：Water phase is added dropwise under the conditions of logical essence nitrogen, mixing speed 2000r/min during dropwise addition, time for adding is 65-
75min.30min is stirred for after completion of dropping.
4) react：Control programming rate, is warmed up to 63~65 DEG C, and reaction 4.5h stops reaction.
Take 492.35ml distilled water to be placed in the mixed tune device of 1000ml volumes, sequentially add 0.25g friction reducer emulsion (copolymerization
Thing molecular weight 750,000, glycerol dimethacrylate：Pi-allyl trimethyl ammonium chloride：Acrylamide=0.5:0.5:1.5, effectively
Constituent concentration 34.5%), mixing speed 800r/min stirs 10s, and (mass percent is constituted to add 1.5g cleanup additives：
The peregal o-20+84.4% of 1%+3.8% octanol of fluorocarbon surfactant FC-1010+0.8% butyl glycol ethers+10% distills
Water), 0.4g bactericide (mixture of the dazomet of 75% glutaraldehyde+25%), (mass percent is constituted 1.5g expansion-resisting agents：75%
The ammonium chloride of tetramethyl ammonium chloride+25%), it is eventually adding 4g ethyl acetate fiber (fibre lengths：9mm, 120 DEG C of degradation temperature),
Initial 10s mixing speed 1500r/min, are then slowly relatively low 800r/min, and stirring 20s is well mixed to be made drop and block water.
Test result：Drop blocks water kinematic viscosity for 2.5mm2/ s, resistance-reducing yield 75% (normal temperature, caliber 8mm, line that drop blocks water
Speed 10m/s), block water static sand setting speed 0.18mm/s, recovery of core permeability 99.5% drop.
Above-mentioned drop is blocked water after Changning-Weiyuan national level shale gas demonstration area application and construction, to returning discharge opeing (kinematic viscosity
It is 0.81mm2/ s, returns discharge opeing salinity 4.5 × 105Mg/L) processed.Return discharge opeing and pH adjusting agent hydrogen-oxygen is added in regulating reservoir
Change sodium (1%), citric acid (1%), bactericide glutaraldehyde (0.05%), dazomet (0.05%) carry out initial stage treatment to returning discharge opeing；
The high valent cationic (calcium, magnesium etc.) that retort is returned in discharge opeing using sodium carbonate removal is subsequently entered, it is then poly- with anion
Propionamide flocculant makes sediment and suspended solid is agglomerating, rapid subsidence, refilters removal suspended solid.With the row of returning after treatment
Liquid replaces the water in formula, is configured to drop by original formulation and blocks water, resistance-reducing yield 74% (normal temperature, caliber 8mm, linear velocity 10m/s).
(embodiment 3)
On the basis of the raw material gross mass for participating in inverse emulsion polymerization, friction reducer emulsion is synthesized by step in detail below：
1) preparation of water phase：By 40.17g glycerol dimethacrylates, 73.11g methylacryoyloxyethyl trimethyls
Ammonium chloride, 37.53g acrylamides are dissolved in distilled water, and add 0.15gEDTA disodiums, and 0.53g initiators are added before emulsification
V50, is uniformly dissolved.
2) preparation of oil phase：Weigh the white oil 64g of mass ratio 20% and emulsifying agent Span-80 (4%, 12.8g), span85
(1%, 3.2g).
3) emulsify：Circulation oil phase, water phase, mixing speed 2000r/min during dropwise addition, during dropwise addition are added dropwise under the conditions of logical essence nitrogen
Between be 65-75min, 30min is stirred for after completion of dropping.
4) react：Control programming rate, is warmed up to 63~65 DEG C, and reaction 4.5h stops reaction.
Take 488.5ml distilled water to be placed in the mixed tune device of 1000ml volumes, sequentially add 1.5g friction reducer emulsion (copolymers
Molecular weight 600,000, glycerol dimethacrylate：MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride：Acrylamide=0.5:1:
1.5, active ingredient concentration 34.5%), mixing speed 800r/min stirs 10s, adds 2.5g cleanup additive (mass percents
Constitute and be：The peregal o-20+ of 1%+3.8% octanol of fluorocarbon surfactant FC-1010+0.8% butyl glycol ethers+10%
84.4% distilled water), (mass percent is constituted 0.5g bactericide：The mixture of the dazomet of 75% glutaraldehyde+25%), 2.0g prevents
Swollen dose (ammonium chloride of 75% tetramethyl ammonium chloride+25%), is eventually adding 5.0g ethyl acetate fiber (fibre lengths：9mm, degraded
120 DEG C of temperature), then initial 10s mixing speeds 1500r/min is slowly relatively low 800r/min, the well mixed systems of stirring 20s
Blocked water into drop.
Test result：Drop blocks water kinematic viscosity for 2.3mm2/ s, drop block water resistance-reducing yield 77.5% (normal temperature, caliber 8mm,
Linear velocity 10m/s), block water static sand setting speed 0.15mm/s, recovery of core permeability 99.5% drop.
Above-mentioned drop is blocked water after Changning-Weiyuan national level shale gas demonstration area application and construction, to returning discharge opeing (kinematic viscosity
It is 0.78mm2/ s, returns discharge opeing salinity 9.5 × 105Mg/L) processed.Return discharge opeing and pH adjusting agent hydrogen-oxygen is added in regulating reservoir
Change sodium (1%), citric acid (1%), bactericide dazomet (1%) carries out initial stage treatment to returning discharge opeing；Subsequently enter retort utilization
The high valent cationic (calcium, magnesium etc.) in discharge opeing is returned in sodium carbonate removal, then makes precipitation with the poly- propionamide flocculant of anion
Thing and suspended solid is agglomerating, rapid subsidence, refilters removal suspended solid.With after treatment return discharge opeing replace formula in water,
Drop is configured to by original formulation to block water, resistance-reducing yield 77.3% (normal temperature, caliber 8mm, linear velocity 10m/s).
(embodiment 4)
(live formation water salinity is to take 490.25ml scenes stratum water：20×105Mg/L 1000ml volumes) are placed in
In mixed tune device, 2.5g friction reducers emulsion (the gained friction reducer emulsion of embodiment 3), mixing speed 800r/min, stirring are sequentially added
10s, (mass percent is constituted to add cleanup additive 1.5g：1% fluorocarbon surfactant FC-1010+0.8% ethylene glycol fourths
The peregal o-20+84.4% distilled water of the octanol of ether+3.8%+10%), (mass percent is constituted 0.25g bactericide：75%
The mixture of the dazomet of glutaraldehyde+25%), 1.5g expansion-resisting agents (ammonium chloride of 75% tetramethyl ammonium chloride+25%) are eventually adding 4.0g
Ethyl acetate fiber (fibre length：9mm, 120 DEG C of degradation temperature), initial 10s mixing speeds 1500r/min, then slowly compared with
As little as 800r/min, stirring 20s be well mixed to be made drop and blocks water.
Test result：Drop blocks water kinematic viscosity for 2.5mm2/ s, determines resistance-reducing yield 77.8% (normal temperature, caliber that drop blocks water
8mm, linear velocity 10m/s), recovery of core permeability 99.8%.
Claims (10)
1. a kind of friction reducer, it is characterised in that (1~4) is pressed by acrylamide, esters monomer A and cationic monomer B: 0.5:
The inverted emulsion polymerization random copolymerization of mol ratio of (0.5~1) is obtained, wherein the esters monomer A be methacrylic acid and/or
The carboxylate of acrylic acid and glycerine, structural formula is
Wherein, R1, R2 are H or-CH3；
The cationic monomer B is pi-allyl trimethyl ammonium chloride or MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride, and gained is common
The viscosity average molecular weigh of polymers is 5 × 105~8 × 105。
2. friction reducer as claimed in claim 1, it is characterised in that the reaction temperature of the inverse emulsion polymerization is 63~65
DEG C, the reaction time is 4~5h, and initiator is azo diisobutyl amidine hydrochloride.
3. a kind of drop blocks water, and the drop blocks water comprising the friction reducer described in claim 1 or 2.
4. drop as claimed in claim 3 is blocked water, it is characterised in that its composition is included by weight percentage
Friction reducer emulsion 0.02%~0.08%
Transporting agent 0.5%~1%
Wherein, the friction reducer emulsion includes the friction reducer described in claim 1 or 2, and active ingredient concentration is 25%~40%,
The transporting agent is acid fiber by polylactic, and the fibre length of the acid fiber by polylactic is 5-12mm, the degraded of the acid fiber by polylactic
Temperature is 70-120 DEG C.
5. drop as claimed in claim 4 blocks water, it is characterised in that its composition is by weight percentage
6. drop as claimed in claim 5 blocks water, it is characterised in that the mass percent of the cleanup additive constitutes and is：
7. drop as claimed in claim 5 blocks water, it is characterised in that the expansion-resisting agent is quaternary ammonium salt expansion-resisting agent.
8. drop as claimed in claim 5 blocks water, it is characterised in that the expansion-resisting agent is ammonium chloride and/or tetramethyl ammonium chloride.
9. drop as claimed in claim 5 blocks water, it is characterised in that the bactericide is glutaraldehyde and/or dazomet.
10. any one of claim 3-9 drop block water non-conventional gas well volume fracturing construction in application, it is described very
Rule gas well refers to gas well of the permeability less than 0.1mD.
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| CN106876002B (en) * | 2017-03-03 | 2019-04-05 | 北京兴天通电讯科技有限公司 | A kind of self-conductive type macromolecular scaffold friction reducer and its production method |
| CN107057675A (en) * | 2017-05-19 | 2017-08-18 | 中国石油集团川庆钻探工程有限公司 | Suitable for the high salt tolerant reversed-phase emulsion friction reducer of shale reservoir fracturing reform |
| CN109135712A (en) * | 2018-08-01 | 2019-01-04 | 四川省威沃敦化工有限公司 | A kind of shale gas fracturing fluid instant water-in-water emulsion friction reducer and preparation method thereof |
| CN112503064B (en) * | 2020-12-09 | 2022-06-14 | 鞍钢集团矿业有限公司 | Drag reducer for ore pulp pipeline transportation and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6187839B1 (en) * | 1999-03-03 | 2001-02-13 | Halliburton Energy Services, Inc. | Methods of sealing compositions and methods |
| WO2005089106A2 (en) * | 2004-02-27 | 2005-09-29 | Molecular Therapeutics, Inc. | Degradable nanoparticles |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6187839B1 (en) * | 1999-03-03 | 2001-02-13 | Halliburton Energy Services, Inc. | Methods of sealing compositions and methods |
| WO2005089106A2 (en) * | 2004-02-27 | 2005-09-29 | Molecular Therapeutics, Inc. | Degradable nanoparticles |
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