CN101724387A - Polyhydroxy alcohol fracturing fluid - Google Patents

Polyhydroxy alcohol fracturing fluid Download PDF

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Publication number
CN101724387A
CN101724387A CN 200810224437 CN200810224437A CN101724387A CN 101724387 A CN101724387 A CN 101724387A CN 200810224437 CN200810224437 CN 200810224437 CN 200810224437 A CN200810224437 A CN 200810224437A CN 101724387 A CN101724387 A CN 101724387A
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China
Prior art keywords
solution
alcohol
parts
water
polyhydroxy
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CN 200810224437
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Chinese (zh)
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CN101724387B (en
Inventor
李宪文
赵文
李建山
吕海燕
薛小佳
尹晓宏
丁里
刘静
吕伟
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Petrochina Co Ltd
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Petrochina Co Ltd
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Abstract

The invention relates to a polyhydroxy alcohol fracturing fluid; the composition comprises the following components in parts by weight: solution A: 2-3 parts of a mixture of polyvinyl alcohol with the molecular weight of less than 10 ten thousand and polyethylene glycol with the molecular weight of less than 4 ten thousand; 0.1-0.6 part of sodium carbonate, sodium bicarbonate or sodium hydroxide; 0.3-0.5 part of nonionic surface activity; ammonium persulfate, potassium persulfate, hydrogen peroxide, formation water or crude oil 0.005-0.5 part and water 95-98 parts; solution B: 0.5-1.0 part of organic or inorganic boron compound and 99-99.5 parts of water; mixing the solution A and the solution B according to the volume ratio of 100: 8-12; the polyhydroxy alcohol accounts for 10 percent of the polyvinyl alcohol and 90 percent of the polyethylene glycol; the gel breaking agent can break gel through the oxidation gel breaker without adding a cleanup additive, a clay stabilizer and a bactericide, and can be promoted to break gel by contacting formation water and crude oil, and the viscosity of the gel breaking solution is close to that of clear water.

Description

A kind of polyhydroxy-alcohol fracturing fluid
Technical field:
The present invention relates to employed polyhydroxy-alcohol fracturing fluid in hypotonic hydrocarbon zone oil well of a kind of suitable spy or the gasser fracturing yield increasing technology.
Background technology:
In the prior art, at present, alcohol-base fracturing fluid is owing to contain a large amount of methyl alcohol or ethanol in the fracturing liquid, can form the mixture of any ratio with water, after alcohol-base fracturing fluid enters water lock reservoir, can to greatest extent the water that reservoir fettered be absorbed, and along with fracturing liquid is discharged ground, remove the water lock of reservoir, help the row of returning of liquid, reduced reservoir damage.But alcohol-base fracturing fluid needs to add the thickening material of high molecular weight species too, such as vegetable jelly and derivative, polyacrylamide and derivative thereof, the thickening material molecular weight is usually up to millions of, and thickening material and generation fragment hold-up in reservoir thereof are big, and the injury of reservoir is bigger; And the low-carbon alcohol of adding for the row's of helping purpose (methyl alcohol, ethanol etc.) the high consumption of ubiquity working concentration is big, price is expensive, volatile, inflammable, shortcoming such as safety and environmental requirement height restricts the large-scale application of alcohol-base fracturing fluid at oil-gas field always during construction.
Summary of the invention:
The object of the present invention is to provide the polyhydroxy-alcohol fracturing fluid that has the reservoir protection effect in a kind of suitable low pressure, the special hypotonic hydrocarbon zone oil well of hypotonic, strong water-sensitive or the gasser fracturing yield increasing technology.
Polyhydroxy-alcohol fracturing fluid of the present invention is grouped into by following one-tenth by weight:
Solution A:
2~3 parts of polyhydroxy-alcohol thickening materials
0.1~0.6 part of pH regulator agent
0.3~0.5 part of emulsion splitter
0.005~0.5 part of gel breaker
95~98 parts in water
Solution B:
Linking agent 0.5-1.0 part
99~99.5 parts in water
Is 100: 8~12 mixed with solution A, solution B with volumetric ratio, makes alcohol-base fracturing fluid.
Described polyhydroxy-alcohol thickening material is low-molecular-weight polyhydroxylated polymer, the mixture of polyvinyl alcohol that is specifically (molecular weight is less than 100,000) and polyoxyethylene glycol (molecular weight is less than 40,000), and wherein polyvinyl alcohol accounts for 10% of gross weight, and polyoxyethylene glycol accounts for 90%.
Described pH regulator agent is by yellow soda ash, sodium bicarbonate and sodium hydroxide.
Described emulsion splitter non-ionic surface active.
Described gel breaker is ammonium persulphate, Potassium Persulphate, hydrogen peroxide, local water or crude oil.
Described linking agent is that described linking agent is the inorganic or organic compound of boron.
The invention characteristics:
The host of polyhydroxy-alcohol fracturing fluid of the present invention is a kind of thickening material of new research and development, polyhydric molecular structure makes itself except thickening power, also has the effect that reduces surface and interface tension force and stable clay, and this viscosifying agent itself just can realize crosslinked and form frozen glue and taken sand, do not need the high molecular thickening material; The low surface and interface tensile property of polyhydroxy-alcohol breaking glue solution can reduce fracturing liquid to greatest extent and enter in the kapillary, helps the row of returning of liquid.The special poly-hydroxy molecular structure of polyhydroxy-alcohol can be stablized clay, prevents the clay swelling migration.This thickening material is aided with a small amount of several additive can form polyhydroxy-alcohol fracturing fluid, and fracturing liquid can be by the broken glue of number of ways, and broken glue is thorough, and breaking glue solution viscosity is near clear water.
The present invention is in the technical innovation of having carried out aspect three of fracturing liquid.
1, the thickening material of property
The host of polyhydroxy-alcohol fracturing fluid of the present invention is a kind of thickening material of new research and development, this thickening material is a kind of low-molecular-weight polyhydroxy-alcohol, polyhydric molecular structure makes itself except thickening power, also has the effect that reduces surface and interface tension force and stable clay, and this viscosifying agent itself just can realize crosslinked and form frozen glue and taken sand, do not need additionally to add the high-molecular weight thickening material; Because the special poly-hydroxy molecular structure of polyhydroxy-alcohol, thickening material itself just has the effect of the surface and interface of reduction tensile, system does not need to add low-carbon alcohol (methyl alcohol, ethanol etc.), after polyhydroxy-alcohol fracturing fluid enters water lock reservoir, the low surface and interface tensile property of polyhydroxy-alcohol breaking glue solution, can reduce fracturing liquid to greatest extent and enter in the kapillary, help the row of returning of liquid.The special poly-hydroxy molecular structure of polyhydroxy-alcohol can be stablized clay, prevents the clay swelling migration.
2, recipe ingredient is few, and broken glue approach is many, and broken glue is thorough
Polyhydroxy-alcohol fracturing fluid of the present invention constitutes polyhydroxy-alcohol fracturing fluid by water, polyhydroxy-alcohol thickening material, linking agent, emulsion splitter, gel breaker, pH regulator agent, compare with conventional fracturing liquid, this fracturing liquid system does not need to add cleanup additive, clay stabilizer and sterilant, and system component is few.Broken glue not only can be by the broken glue of oxidation class gel breaker, and contact local water and crude oil also can promote broken glue, and it is thorough to break glue, and breaking glue solution viscosity is near clear water.
3, the domestic test in place of carrying out first
The domestic polyhydroxy-alcohol fracturing fluid system that adopts is first tested, and this fracturing liquid is 3 mouthfuls of wells of successful Application at the scene, the highest sand 35 sides, the high sand ratio 38% of adding.The broken glue of the row of returning is thorough easily for this fracturing liquid, and the on-the-spot breaking glue solution viscosity that detects is near clear water.
Embodiment:
Embodiment 1:
30m at the scene 3Add 25m in the container 3Clear water, under with pump round-robin situation, slowly add the 600kg molecular weight less than 100,000 polyvinyl alcohol and molecular weight mixture less than 40,000 polyoxyethylene glycol, polyvinyl alcohol accounts for 40% by weight percentage, and polyoxyethylene glycol accounts for 60%, presses formula rate then successively and adds nonionogenic tenside, ammonium persulphate, yellow soda ash, continue circulation 10 minutes, in working cycle that the liquid benefit is full, continue 20 minutes so that liquid mixing is abundant, form solution A.
At 15m 3Add clear water 14m in the container 3, under pump round-robin situation, successively slowly add the 90Kg borate, circulated 30 minutes, so that liquid mixing is abundant, it is stand-by to be mixed with solution B.
During pressing crack construction, in the infusion solution A, with solution B by with solution A with solution A: solution B=100 liter: 8 liters volume ratio is mixed and is formed the polyhydroxy-alcohol gelled fracturing fluid.
Embodiment 2
Fracturing liquid is the mixture with following composition and weight part:
Solution A:
3 parts of polyhydroxy-alcohol thickening materials
0.6 part of pH regulator agent
0.5 part of emulsion splitter
0.5 part of gel breaker
98 parts in water
Solution B:
1.0 parts of linking agents
99.5 parts in water
Is 100: 12 mixed with solution A, solution B with volumetric ratio, makes alcohol-base fracturing fluid.
The polyhydroxy-alcohol thickening material is the mixture of polyvinyl alcohol (molecular weight is less than 100,000) and polyoxyethylene glycol (molecular weight is less than 40,000), and wherein polyvinyl alcohol accounts for 40% of gross weight, and polyoxyethylene glycol accounts for 60%.
PH regulator agent sodium bicarbonate.
Emulsion splitter nonionogenic tenside octodecyl alcohol polyoxyethylene polyethenoxy ether.The gel breaker Potassium Persulphate.
Linking agent is the mineral compound borax of boron.
Execute example 3
Constitute by following composition by weight:
Solution A:
2 parts of polyhydroxy-alcohol thickening materials
0.1 part of pH regulator agent
0.3 part of emulsion splitter
0.005 part of gel breaker
95 parts in water
Solution B:
0.5 part of linking agent
99 parts in water
Is 100: 10 mixed with solution A, solution B with volumetric ratio, makes alcohol-base fracturing fluid;
The polyhydroxy-alcohol thickening material is a molecular weight less than 100,000 polyvinyl alcohol and the molecular weight mixture less than 40,000 polyoxyethylene glycol, and polyvinyl alcohol accounts for 40% by weight percentage, and polyoxyethylene glycol accounts for 60%;
The pH regulator agent is a sodium hydroxide;
Emulsion splitter nonionogenic tenside octodecyl alcohol polyoxyethylene polyethenoxy ether;
Linking agent is the organic complex of borate and trolamine;
Gel breaker is a hydrogen peroxide.

Claims (1)

1. polyhydroxy-alcohol fracturing fluid is characterized in that: be made of composition by weight: solution A:
2~3 parts of polyhydroxy-alcohol thickening materials
0.1~0.6 part of pH regulator agent
0.3~0.5 part of emulsion splitter
0.005~0.5 part of gel breaker
95~98 parts in water
Solution B:
Linking agent 0.5-1.0 part
99~99.5 parts in water
Is 100: 8~12 mixed with solution A, solution B with volumetric ratio, makes alcohol-base fracturing fluid;
The polyhydroxy-alcohol thickening material is a molecular weight less than 100,000 polyvinyl alcohol and the molecular weight mixture less than 40,000 polyoxyethylene glycol, and polyvinyl alcohol accounts for 40% by weight percentage, and polyoxyethylene glycol accounts for 60%;
The pH regulator agent is yellow soda ash, sodium bicarbonate or sodium hydroxide;
The emulsion splitter nonionogenic tenside;
Linking agent is the organic or inorganic compound of boron;
Gel breaker is ammonium persulphate, Potassium Persulphate, hydrogen peroxide, local water or crude oil.
CN 200810224437 2008-10-15 2008-10-15 Polyhydroxy alcohol fracturing fluid Active CN101724387B (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102796506A (en) * 2011-05-25 2012-11-28 中国石油天然气股份有限公司 Amphoteric surfactant fracturing fluid
CN104974739A (en) * 2015-07-10 2015-10-14 四川大学 Cellulose blended modified polyvinyl alcohol fracturing fluid and preparation method thereof
CN106928654A (en) * 2015-12-30 2017-07-07 北京仁创科技集团有限公司 Water-soluble expanding material composition and from suspended prop and the preparation method and application of proppant
CN107286916A (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 containing PVA, PVA fiber, oil gas field well cementation agent and oil-gas field fracturing diverting agent
CN109536152A (en) * 2018-10-18 2019-03-29 中国石油天然气股份有限公司 gel fracturing fluid system
CN113292985A (en) * 2021-06-25 2021-08-24 昆山京昆油田化学科技有限公司 Alcohol-based guar gum fracturing fluid and preparation method and application thereof

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CN103923632B (en) * 2014-01-28 2017-01-25 北京大德广源石油技术服务有限公司 Desorbent and its evaluation method

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US6149693A (en) * 1996-02-06 2000-11-21 Ethox Chemicals, Inc. Hydrocarbon gels useful in formation fracturing
US6818597B2 (en) * 2000-04-21 2004-11-16 Benchmark Research & Technology, Inc. Suspensions of water soluble polymers in surfactant free non-aqueous solvents
CN1205299C (en) * 2003-05-21 2005-06-08 中国海洋石油总公司 Composite multifunctional chemical unblocking agent
US20050194142A1 (en) * 2004-03-05 2005-09-08 Nguyen Philip D. Compositions and methods for controlling unconsolidated particulates
EP1771508B1 (en) * 2004-07-20 2017-06-07 Hercules Incorporated Use of polyethylene glycol based fluidized polymer suspension in functional systems
CN101081976B (en) * 2006-05-29 2011-11-23 中国科学技术大学 Fire-resistant non-injury fracturing fluid thickening agent and preparation method and usage thereof
CN100537699C (en) * 2007-07-31 2009-09-09 中国石油天然气股份有限公司 Water-soluble drag reducer for heavy oil well and preparation method thereof

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102796506A (en) * 2011-05-25 2012-11-28 中国石油天然气股份有限公司 Amphoteric surfactant fracturing fluid
CN102796506B (en) * 2011-05-25 2014-08-06 中国石油天然气股份有限公司 Amphoteric surfactant fracturing fluid
CN104974739A (en) * 2015-07-10 2015-10-14 四川大学 Cellulose blended modified polyvinyl alcohol fracturing fluid and preparation method thereof
CN106928654A (en) * 2015-12-30 2017-07-07 北京仁创科技集团有限公司 Water-soluble expanding material composition and from suspended prop and the preparation method and application of proppant
CN107286916A (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 containing PVA, PVA fiber, oil gas field well cementation agent and oil-gas field fracturing diverting agent
CN109536152A (en) * 2018-10-18 2019-03-29 中国石油天然气股份有限公司 gel fracturing fluid system
CN113292985A (en) * 2021-06-25 2021-08-24 昆山京昆油田化学科技有限公司 Alcohol-based guar gum fracturing fluid and preparation method and application thereof
CN113292985B (en) * 2021-06-25 2022-09-20 昆山京昆油田化学科技有限公司 Alcohol-based guar gum fracturing fluid and preparation method and application thereof

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