CN105441048B - A kind of water-soluble comb polymer pressure break temporarily blocks up diversion agent and its prepares application method - Google Patents
A kind of water-soluble comb polymer pressure break temporarily blocks up diversion agent and its prepares application method Download PDFInfo
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- CN105441048B CN105441048B CN201510866016.5A CN201510866016A CN105441048B CN 105441048 B CN105441048 B CN 105441048B CN 201510866016 A CN201510866016 A CN 201510866016A CN 105441048 B CN105441048 B CN 105441048B
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- 229920000642 polymer Polymers 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 65
- 239000003349 gelling agent Substances 0.000 claims abstract description 21
- 239000003381 stabilizer Substances 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000012745 toughening agent Substances 0.000 claims abstract description 12
- 239000000654 additive Substances 0.000 claims abstract description 10
- 230000000996 additive effect Effects 0.000 claims abstract description 10
- 239000002775 capsule Substances 0.000 claims abstract description 10
- 239000004927 clay Substances 0.000 claims abstract description 10
- 238000004132 cross linking Methods 0.000 claims abstract description 10
- 241000425037 Toona sinensis Species 0.000 claims abstract description 8
- 238000001338 self-assembly Methods 0.000 claims abstract description 7
- 238000002360 preparation method Methods 0.000 claims abstract description 6
- 239000003208 petroleum Substances 0.000 claims abstract description 5
- 238000010276 construction Methods 0.000 claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 239000000835 fiber Substances 0.000 claims description 10
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 9
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 8
- 239000003292 glue Substances 0.000 claims description 7
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 6
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical group [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000000499 gel Substances 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 3
- 235000019439 ethyl acetate Nutrition 0.000 claims description 3
- 239000001103 potassium chloride Substances 0.000 claims description 3
- 235000011164 potassium chloride Nutrition 0.000 claims description 3
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 claims description 3
- 235000019345 sodium thiosulphate Nutrition 0.000 claims description 3
- 235000015110 jellies Nutrition 0.000 claims description 2
- 239000008274 jelly Substances 0.000 claims description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 claims 1
- 229920002451 polyvinyl alcohol Polymers 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 abstract description 7
- 230000006378 damage Effects 0.000 abstract description 7
- 238000007789 sealing Methods 0.000 abstract description 4
- ZRALSGWEFCBTJO-UHFFFAOYSA-N Guanidine Chemical compound NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000001828 Gelatine Substances 0.000 description 3
- CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 description 3
- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920000159 gelatin Polymers 0.000 description 3
- 235000019322 gelatine Nutrition 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 1
- 229960000583 acetic acid Drugs 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010382 chemical cross-linking Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005543 nano-size silicon particle Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- -1 vinal Substances 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
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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
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/5083—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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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
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/5045—Compositions based on water or polar solvents containing inorganic 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
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/66—Compositions based on water or polar solvents
- C09K8/665—Compositions based on water or polar solvents containing inorganic 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
- C09K8/62—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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
- E21B33/138—Plastering the borehole wall; Injecting into the formation
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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
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- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/08—Fiber-containing well treatment fluids
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/10—Nanoparticle-containing well treatment fluids
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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
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- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/26—Gel breakers other than bacteria or enzymes
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- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Inorganic Chemistry (AREA)
- Sealing Material Composition (AREA)
Abstract
The present invention provides a kind of water-soluble comb polymer pressure breaks temporarily to block up diversion agent, and including following components, the mass percent shared by each component and each component is：Gelling agent 0.2~2.0%；Fluid loss additive 0.1~2%；Toughener 1~10%；Clay stabilizer 1~4%；High-temperature stabilizer 0.05~0.2%；Capsule breaker 0.01~0.1%；Remaining component is water, and the gelling agent is water-soluble comb polymer, physical crosslinking structure can be self-assembly of by comb-type structure, the trade name of the gelling agent is one hundred Chinese toon high temperature gel, is produced by one hundred Chinese toon Petroleum Technology Co., Ltd of Chengdu.The present invention additionally provides the method for preparation and use that above-mentioned water-soluble comb polymer pressure break temporarily blocks up diversion agent simultaneously.Water solubility pressure break provided by the invention temporarily block up diversion agent without Hou Ning, it is small to formation damage, while also have can automatic identification crack, the characteristics of sealing ratiod is high.
Description
Technical field
The present invention relates to it is a kind of can be applied to oil, gas well hydraulic fracturing the temporary stall of water-soluble comb polymer pressure break to
Agent and the preparation and application of the temporary stifled diversion agent, belong to oil-gas reservoir yield-increasing technology field.
Background technology
With continually developing for China's petroleum resources, reservoir geology condition becomes increasingly complex, and exploits difficulty also increasingly
Greatly.In recent years, it for strong anisotropism, hypotonic, ultra-permeable reservior, to further improve transformation efficiency, realizes uniformly transformation, carries
Temporarily stifled steering technique is gone out.It is to add in temporarily stifled diversion agent in real time in hydraulic fracturing process, temporarily blocks up established man-made fracture,
Forcing crack, high pressure presses off new crack, fracturing transformation effect is improved to increase communication probability in other direction crack initiation extensions.
In this technology, good temporarily stifled material is the key that realize effectively temporary stifled pressure break.
At present, the temporarily stifled diversion agent as pressing crack construction can be divided mainly into water-soluble temporarily stifled diversion agent, oil-soluble both at home and abroad
Temporarily stifled diversion agent, temporarily stifled three kinds of diversion agent of degrading certainly.Water-soluble temporarily stifled diversion agent is broadly divided into two major class：Cross-linking system and Fei Jiao
Conjuncted system.Be crosslinked class diverting agent mainly using high molecular polymer, by chemical crosslinking formed gel reach the temporary stall in crack to
Required structural strength realizes de-plugging after construction by oxidizing broken glue.Zhou Fayuan et al. has studied a kind of pressure break
Diverting agent ZFJ realizes temporary block up by the way that water-soluble polymer secondary cross-linking is formed gel.Patent 201010134590.9 describes
A kind of water solubility diverting agent, it is raw material using guanidine glue and alundum (Al2O3) etc., is crosslinked under formation conditions, forms pressure-bearing and reaches
The rubber plug of 30MPa, so as to fulfill closure.Non-crosslinked class diverting agent is generally using materials such as gelatine, water-absorbing resins.Patent
91101010.6th, CN 102093864 A, CN 102020984 A and patent CN200410009408.1 disclose describe it is several
Kind of diverting agent, these diverting agents are made of materials such as gelatine, guanidine glue, and the aquation pressure that makes breakthroughs reaches 8MPa under formation conditions
Plugged zone.South monarch et al. is relied to use a kind of noncrosslinking water uptake expansion material, and as diverting agent, breakthrough pressure gradient reaches
47.1MPa/m.This two classes water solubility pressure break temporarily blocks up diversion agent all there are certain deficiency, is mainly manifested in：
1) pressing crack construction cannot be carried out immediately after adding in diverting agent, need certain Hou Ning times；
2) non-crosslinked class, which temporarily blocks up the products such as gelatine, the guanidine glue that diversion agent uses, all has higher water insoluble matter content, right
Formation damage is big；Class diverting agent is crosslinked although water insoluble matter content is few in the high molecular polymer used, cross-linking process will produce
Raw a large amount of water-insolubles, can also cause serious injury stratum.
Due to these two aspects, the popularization and application that water-soluble pressure break temporarily blocks up diversion agent is caused to be restricted.
Invention content
The present invention provides a kind of novel water-soluble comb polymer pressure breaks temporarily to block up diversion agent, which temporarily blocks up
Diversion agent without Hou Ning, it is small to formation damage, while also have can automatic identification crack, the characteristics of sealing ratiod is high.
Technical solution is used by realizing above-mentioned purpose of the present invention：
A kind of water-soluble comb polymer pressure break temporarily blocks up diversion agent, including following components, shared by each component and each component
Mass percent be：Gelling agent 0.2~2.0%；Fluid loss additive 0.1~2%；Toughener 1~10%；Clay stabilizer 1~
4%；High-temperature stabilizer 0.05~0.2%；Capsule breaker 0.01~0.1%；Remaining component is water, and the gelling agent is water
Dissolubility comb-shaped polymer can be self-assembly of physical crosslinking structure by comb-type structure, and the trade name of the gelling agent is one hundred
Chinese toon high temperature gel, product designation BCG-5 are produced, industrial goods, the following institute of structural formula by one hundred Chinese toon Petroleum Technology Co., Ltd of Chengdu
Show：
The fluid loss additive is dewatering nano silica.
The one kind of the toughener for the poly- acetic ester fiber of hydrophilic modifying, in vinal, fibre length 5mm~
Between 50mm.
The clay stabilizer is potassium chloride.
The high-temperature stabilizer is one or both of sodium thiosulfate, methanol.
The capsule breaker content is ammonium persulfate.
The present invention additionally provides the method for preparation and use that above-mentioned water-soluble comb polymer pressure break temporarily blocks up diversion agent simultaneously,
Include the following steps：
(1), under cycle or blender stirring condition, in clear water by above-mentioned mass percent be slowly added to gelling agent,
Fluid loss additive, toughener, clay stabilizer and high-temperature stabilizer, fully cycle or stirring, treat that gelling agent is completely dissolved, obtain
Temporarily stifled diversion agent；
(2), connect bypass line in fracture well head, after hydraulic fracturing seam suspend pressure break pump truck, by temporary stall to
Agent is pumped into shaft bottom by cementing truck from bypass line, and adding in capsule by above-mentioned mass percent while pumping temporarily stifled diversion agent breaks
Jelly；It will temporarily block up after diversion agent has replaced without Hou Ning, and continue main pressing crack construction, and realize that pressure break will turn in seam；Also it will can temporarily block up
Diversion agent is pumped into the mulling slot of fracturing blender truck, and temporary stifled diversion agent is pumped into shaft bottom by fracturing unit truck.
By the use of a kind of water-soluble comb polymer with special construction as gelling agent in the present invention, in aqueous solution,
The gelling agent does not need to be chemically crosslinked, and is self-assembly of physical crosslinking structure by comb-type structure, is temporarily blocked up so as to reach crack
Structural strength needed for turning to.Since this physical crosslinking structure is reversible, thus with very strong thixotropy.It was pumping
Cheng Zhong, under Strong shear effect, self-assembled structures destroy, and viscosity is low, good fluidity, easily enters crack deep.It is split when entering
After seam, flow velocity reduces, and shear action weakens, and self-assembled structures restore again, realizes and effectively blocks.Due to this spy of solution
Property makes it have automatic identification crack, the characteristics of fracture sealing ratiod is high.The physical crosslinking knot being self-assembly of of comb-type structure
Structure is rigidly strong, thus the performance characteristics also with good temperature resistance, salt resistance.Its own is free of water-insoluble, is handed over without chemistry
Connection, will not generate water-insoluble, thus the injury that will not result in blockage to stratum.The gelling agent solution thixotropy is good, viscoplasticity
By force, it is easily adhered to crack and rock surface is realized and blocked.
Fluid loss additive described herein is dewatering nano silica.Dewatering nano material can not only change rock table
The wetability in face, moreover it is possible to and gellant molecules chain bridge joint, false filter cake is formed, significantly reduces leak-off.Due to nano silicon dioxide
Grain is sufficiently small, and the particle into formation pore throat can will not damage stratum with drain outflow is returned again.In addition, the toughening
Agent is the poly- acetic ester fiber of hydrophilic modifying, one kind in vinal, and fibre length is between 5mm~50mm.The toughening
Agent mainly using fiber reinforced principle, improves the breakthrough pressure of temporarily blocking layer.
Based on above-mentioned condition, the application compared with prior art, has effect following prominent：
(1) the water-soluble comb polymer pressure break is temporarily blocked up diversion agent and is pumped into behind shaft bottom without Hou Ning, can continue main pressure break
The construction time is shortened in construction.
(2) system is self-assembly of physical crosslinking structure by comb-type structure, reaches the temporary stall in crack to required
Structural strength, solve the disadvantages that conventional water-soluble pressure break diverting agent water insoluble matter content height, it is big to formation damage.
(3) the characteristics of system makes it have automatic identification crack due to strong thixotropy, and sealing ratiod is high.
Specific embodiment
Below in conjunction with specific embodiment, the present invention is described in detail, the embodiment be to the present invention furtherly
It is bright rather than limit the scope of the invention.
Gelling agent described in following embodiment is water-soluble comb polymer, can be self-assembly of object by comb-type structure
Manage cross-linked structure, the trade name of the gelling agent is one hundred Chinese toon high temperature gel, product designation BCG-5, by one hundred Chinese toon petroleum science and technology of Chengdu
Co., Ltd produces, industrial goods.The fluid loss additive is dewatering nano silica.The toughener is hydrophilic modifying poly-vinegar acid
One kind in ester fiber, vinal, fibre length is between 5mm~50mm.The clay stabilizer is potassium chloride.Institute
High-temperature stabilizer is stated as one or both of sodium thiosulfate, methanol.The capsule breaker content is ammonium persulfate.
Embodiment 1
The method of preparation and use that the water-soluble comb polymer pressure break provided in the present embodiment temporarily blocks up diversion agent is as follows：
Under cycle or blender stirring condition, be slowly added to by mass percentage in clear water 0.8% gelling agent,
0.5% fluid loss additive, 3% toughener, 1% clay stabilizer, 0.1% high-temperature stabilizer, fully cycle or stirring, wait to be gelled
Agent is completely dissolved, and obtains temporarily blocking up diversion agent.
Bypass line is connected in fracture well head before construction, suspends pressure break pump truck after hydraulic fracturing seam, by temporary stall
Shaft bottom is pumped into from bypass line by 700 type cementing trucks to agent, pumps the quality percentage by 0.04% while temporarily blocking up diversion agent
Than adding in capsule breaker.It will temporarily block up after diversion agent has replaced without Hou Ning, and continue main pressing crack construction, and realize that pressure break will turn in seam
To.
Embodiment 2
The method of preparation and use that the water-soluble comb polymer pressure break provided in the present embodiment temporarily blocks up diversion agent is as follows：
Under cycle or blender stirring condition, be slowly added to by mass percentage in clear water 1.2% gelling agent,
1% fluid loss additive, 5% toughener, 2% clay stabilizer, 0.1% high-temperature stabilizer, fully cycle or stirring, treat gelling agent
It is completely dissolved, obtains temporarily blocking up diversion agent.
Discharge capacity is reduced after hydraulic fracturing seam, temporary stifled diversion agent is pumped into instead of fracturing fluid in the mulling slot of fracturing blender truck,
Temporary stifled diversion agent is pumped by shaft bottom by fracturing unit truck, glue is added in by 0.08% mass percent while pumping temporarily stifled diversion agent
Capsule gel breaker.It will temporarily block up after diversion agent has replaced without Hou Ning, and continue main pressing crack construction, and realize that pressure break will turn in seam.
It should be understood that for those of ordinary skills, can be improved or converted according to the above description,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (5)
1. a kind of water-soluble comb polymer pressure break temporarily blocks up diversion agent, it is characterised in that including following components, each component and each
Mass percent shared by component is：Gelling agent 0.2~2.0%；Fluid loss additive 0.1~2%；Toughener 1~10%；Clay is steady
Determine agent 1~4%；High-temperature stabilizer 0.05~0.2%；Capsule breaker 0.01~0.1%；Remaining component be water, the glue
Solidifying agent is water-soluble comb polymer, and physical crosslinking structure, the commodity of the gelling agent can be self-assembly of by comb-type structure
Entitled one hundred Chinese toon high temperature gel, product designation BCG-5 are produced, industrial goods, structure by one hundred Chinese toon Petroleum Technology Co., Ltd of Chengdu
Formula is as follows：
The fluid loss additive is dewatering nano silica；The toughener is the poly- acetic ester fiber of hydrophilic modifying, polyvinyl alcohol
One kind in fiber, fibre length is between 5mm~50mm.
2. water-soluble comb polymer pressure break according to claim 1 temporarily blocks up diversion agent, it is characterised in that：The clay is steady
Agent is determined for potassium chloride.
3. water-soluble comb polymer pressure break according to claim 1 temporarily blocks up diversion agent, it is characterised in that：The high temperature is steady
Agent is determined for one or both of sodium thiosulfate, methanol.
4. water-soluble comb polymer pressure break according to claim 1 temporarily blocks up diversion agent, it is characterised in that：The capsule is broken
Jelly content is ammonium persulfate.
5. water-soluble comb polymer pressure break described in claim 1 temporarily blocks up the method for preparation and use of diversion agent, feature exists
In including the following steps：
(1), under cycle or blender stirring condition, gelling agent is slowly added to by above-mentioned mass percent, drop is filtered in clear water
Agent, toughener, clay stabilizer and high-temperature stabilizer, fully cycle or stirring are lost, treats that gelling agent is completely dissolved, is temporarily blocked up
Diversion agent；
(2), bypass line is connected in fracture well head, suspends pressure break pump truck after hydraulic fracturing seam, will temporarily block up diversion agent and lead to
It crosses cementing truck and is pumped into shaft bottom from bypass line, adding in capsule by above-mentioned mass percent while pumping temporarily stifled diversion agent breaks glue
Agent；It will temporarily block up after diversion agent has replaced without Hou Ning, and continue main pressing crack construction, and realize that pressure break will turn in seam；It also can be by temporary stall
It is pumped into the mulling slot of fracturing blender truck to agent, temporary stifled diversion agent is pumped by shaft bottom by fracturing unit truck.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510866016.5A CN105441048B (en) | 2015-11-30 | 2015-11-30 | A kind of water-soluble comb polymer pressure break temporarily blocks up diversion agent and its prepares application method |
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| CN201510866016.5A CN105441048B (en) | 2015-11-30 | 2015-11-30 | A kind of water-soluble comb polymer pressure break temporarily blocks up diversion agent and its prepares application method |
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| CN105441048A CN105441048A (en) | 2016-03-30 |
| CN105441048B true CN105441048B (en) | 2018-06-12 |
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| CN107286923A (en) * | 2016-04-12 | 2017-10-24 | 中国石油化工集团公司 | A kind of oil-gas field fracturing liquid, oil gas field well cementation agent and oil-gas field fracturing diverting agent |
| CN106150429A (en) * | 2016-08-24 | 2016-11-23 | 江汉油田科瑞德石油工程技术（武汉）有限公司 | Shale gas is multistage splits pressure diverting agent, without bridging plug fracturing process and device |
| CN112459761A (en) * | 2020-11-28 | 2021-03-09 | 濮阳华成恒业石油技术开发有限公司 | Temporary plugging acid fracturing method |
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| CN101903491A (en) * | 2007-12-14 | 2010-12-01 | 普拉德研究及开发股份有限公司 | The fracturing fluid compositions and the using method thereof that comprise solid epoxy particles |
| CN104212424A (en) * | 2009-04-03 | 2014-12-17 | 哈利伯顿能源服务公司 | Methods of using fluid loss additives comprising micro gels |
| WO2012080299A1 (en) * | 2010-12-17 | 2012-06-21 | Akzo Nobel Chemicals International B.V. | Ammonium salts of chelating agents and their use in oil and gas field applications |
| CN103476899A (en) * | 2010-12-27 | 2013-12-25 | 艾尼股份公司 | Method for recovering oil from a reservoir by means of micro (nano)-structured fluids with controlled release of barrier substances |
| WO2014187565A1 (en) * | 2013-05-23 | 2014-11-27 | Tougas Oilfield Solutions Gmbh | Temperature-stable, electrolytic hydrogel and method for stimulating crude oil and natural gas deposits |
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