CN110746536B - Resistance reducing agent for slickwater and preparation method thereof - Google Patents

Resistance reducing agent for slickwater and preparation method thereof Download PDF

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CN110746536B
CN110746536B CN201911075620.0A CN201911075620A CN110746536B CN 110746536 B CN110746536 B CN 110746536B CN 201911075620 A CN201911075620 A CN 201911075620A CN 110746536 B CN110746536 B CN 110746536B
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CN110746536A (en
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王红科
牛增前
陈世春
靳剑霞
周勋
王鹏
常青
李伟
李风光
蔡景超
徐昊垠
王怀婧
马晓敏
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China National Petroleum Corp
CNPC Bohai Drilling Engineering Co Ltd
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CNPC Bohai Drilling Engineering Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/52—Amides or imides
    • C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
    • C08F220/56—Acrylamide; Methacrylamide
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    • 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
    • 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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    • 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
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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
    • C09K2208/12—Swell inhibition, i.e. using additives to drilling or well treatment fluids for inhibiting clay or shale swelling or disintegrating

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

The invention discloses a drag reducer for slickwater and a preparation method thereof, wherein the drag reducer is prepared by the following preparation steps: s1, uniformly mixing acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, dimethyl hexadecyl allyl ammonium chloride and water to form a water-phase reaction solution; s2, uniformly mixing perfluorobutyl ethylene, an emulsifier and white oil to form an oil phase reaction solution; s3, uniformly mixing the oil-phase reaction solution and the water-phase reaction solution, dropwise adding a water-phase initiator and an oil-phase initiator at 40-60 ℃ under the condition of oxygen-free stirring, and reacting for 3-5 hours to obtain the aqueous phase initiator; the friction reducer for slickwater effectively reduces the friction resistance, the surface tension, the interfacial tension and the CST ratio, so that the friction reducer has good drainage assisting performance, anti-swelling performance and resistance reducing performance, and has the function of one agent with multiple effects; in addition, the friction reducer for slickwater is simple to prepare, convenient to mix on site, capable of effectively reducing the workload of on-site preparation, and good in market application and popularization prospect.

Description

Resistance reducing agent for slickwater and preparation method thereof
Technical Field
The invention relates to the technical field of oil and gas field development, in particular to a drag reducer for slickwater and a preparation method thereof.
Background
With the exploration and development of unconventional oil and gas resources such as shale oil, shale gas and the like, slickwater fracturing is more and more concerned. The resistance reducing agent is used as a core additive of the slickwater system, and needs to be mixed with additives such as a discharge aiding agent, an anti-swelling agent and the like to form the slickwater system due to single performance at present. Different chemical additives need to be transported to the site and stored in different areas, which inevitably increases the transportation cost and the storage cost; when in site fracturing construction, different chemical additives need to be respectively metered through different pipelines at the same time, which brings inconvenience to site continuous blending and consumes a large amount of manpower and material resources. The multifunctional resistance reducing agent integrating resistance reduction, drainage assistance and anti-swelling is convenient for field mixing due to the capability of reducing transportation and storage cost, and has better development prospect and application potential, but the existing multifunctional resistance reducing agent adopts a compounding mode, directly and simply compounds the resistance reducing agent, the anti-swelling agent and the drainage assistance agent, and has the problems of increased addition or reduced resistance reducing effect and the like; and secondly, a synthetic method is adopted, but the synthetic multifunctional resistance reducing agent has the defects of complex synthetic process, poor performance and the like.
Disclosure of Invention
The invention aims to provide a friction reducer for slick water, which effectively reduces friction resistance and has good drainage and anti-swelling performance.
The invention also aims to provide a preparation method of the resistance reducing agent for slickwater.
Therefore, the technical scheme of the invention is as follows:
the resistance reducing agent for slickwater is prepared by the following method, and the specific steps are as follows:
s1, uniformly mixing 20-25 parts by weight of acrylamide, 5-10 parts by weight of 2-acrylamido-2-methylpropanesulfonic acid, 5-10 parts by weight of dimethylhexadecyl allyl ammonium chloride and 100 parts by weight of water to form a water-phase reaction solution;
s2, uniformly mixing 5-10 parts by weight of perfluorobutyl ethylene, 3-5 parts by weight of emulsifier and 40 parts by weight of white oil to form an oil phase reaction solution;
s3, uniformly mixing the oil-phase reaction liquid and the water-phase reaction liquid, introducing nitrogen to remove oxygen under the stirring condition, heating to 40-60 ℃, sequentially dropwise adding the water-phase initiator and the oil-phase initiator or dropwise adding the mixture of the water-phase initiator and the oil-phase initiator, and continuously reacting for 3-5 hours after dropwise adding is finished to obtain the resistance reducing agent.
Preferably, in step S2, the emulsifier is a mixture of TW60 and TX-4, and the weight ratio of the TW60 to the TX-4 is 1 (0.8-1.2).
Preferably, in step S3, the aqueous phase initiator is ammonium persulfate, and the addition amount thereof is 0.01% to 0.015% of the total weight of acrylamide, 2-acrylamido-2-methylpropanesulfonic acid and dimethylhexadecylallylammonium chloride; the oil phase initiator is azobisisobutyronitrile, and the addition amount of the azodiisobutyronitrile is 0.008-0.012 percent of the weight of the perfluorobutyl ethylene.
The friction reducer for the slickwater is prepared by the preparation method of the friction reducer for the slickwater.
Compared with the prior art, the friction reducer for slickwater effectively reduces the friction resistance, the surface tension, the interfacial tension and the CST ratio, so that the slickwater has good drainage assisting performance, anti-swelling performance and resistance reducing performance and has a multi-effect function; in addition, the friction reducer for slickwater is simple to prepare, convenient to mix on site, capable of effectively reducing the workload of on-site preparation, and good in market application and popularization prospect.
Detailed Description
The present invention will be further described with reference to the following examples, which are not intended to limit the invention in any way.
Example 1
A preparation method of a resistance reducing agent for slickwater comprises the following preparation steps:
s1, uniformly mixing 20 parts by weight of acrylamide, 5 parts by weight of 2-acrylamido-2-methylpropanesulfonic acid, 5 parts by weight of dimethylhexadecylallylammonium chloride and 100 parts by weight of water to form a water-phase reaction solution;
s2, uniformly mixing 5 parts by weight of perfluorobutyl ethylene, 3 parts by weight of emulsifier and 40 parts by weight of white oil to form an oil phase reaction solution; wherein the emulsifier is a mixture of TW60 and TX-4, and the weight ratio of the TW60 to the TX-4 is 1: 0.8;
s3, uniformly mixing the oil-phase reaction solution and the water-phase reaction solution, introducing nitrogen to remove oxygen under the stirring condition, heating to 40 ℃, dropwise adding a water-phase initiator and an oil-phase initiator, and continuously reacting for 3 hours to obtain a resistance reducing agent; wherein the water phase initiator is ammonium persulfate, and the addition amount of the ammonium persulfate is 0.01 percent of the total weight of the acrylamide, the 2-acrylamido-2-methylpropanesulfonic acid and the dimethylhexadecylallylammonium chloride; the oil phase initiator was azobisisobutyronitrile added in an amount of 0.008% by weight of perfluorobutyl ethylene.
Example 2
A preparation method of a resistance reducing agent for slickwater comprises the following preparation steps:
s1, uniformly mixing 25 parts by weight of acrylamide, 5 parts by weight of 2-acrylamido-2-methylpropanesulfonic acid, 8 parts by weight of dimethylhexadecylallylammonium chloride and 100 parts by weight of water to form a water-phase reaction solution;
s2, uniformly mixing 10 parts by weight of perfluorobutyl ethylene, 5 parts by weight of emulsifier and 40 parts by weight of white oil to form an oil phase reaction solution; wherein the emulsifier is a mixture of TW60 and TX-4, and the weight ratio of the TW60 to the TX-4 is 1: 1;
s3, uniformly mixing the oil-phase reaction solution and the water-phase reaction solution, introducing nitrogen to remove oxygen under the stirring condition, heating to 50 ℃, dropwise adding a water-phase initiator and an oil-phase initiator, and continuously reacting for 4 hours to obtain the resistance reducing agent; wherein the water phase initiator is ammonium persulfate, and the addition amount of the ammonium persulfate is 0.010 percent of the total weight of the acrylamide, the 2-acrylamide-2-methylpropanesulfonic acid and the dimethylhexadecylallylammonium chloride; the oil phase initiator is azobisisobutyronitrile, and the addition amount of the azodiisobutyronitrile is 0.010 percent of the weight of the perfluorobutyl ethylene.
Example 3
A preparation method of a resistance reducing agent for slickwater comprises the following preparation steps:
s1, uniformly mixing 25 parts by weight of acrylamide, 10 parts by weight of 2-acrylamido-2-methylpropanesulfonic acid, 10 parts by weight of dimethylhexadecylallylammonium chloride and 100 parts by weight of water to form a water-phase reaction solution;
s2, uniformly mixing 10 parts by weight of perfluorobutyl ethylene, 4 parts by weight of emulsifier and 40 parts by weight of white oil to form an oil phase reaction solution; wherein the emulsifier is a mixture of TW60 and TX-4, and the weight ratio of the TW60 to the TX-4 is 1: 1.2;
s3, uniformly mixing the oil-phase reaction solution and the water-phase reaction solution, introducing nitrogen to remove oxygen under the stirring condition, heating to 60 ℃, dropwise adding a water-phase initiator and an oil-phase initiator, and continuously reacting for 5 hours to obtain the resistance reducing agent; wherein the water phase initiator is ammonium persulfate, and the addition amount of the ammonium persulfate is 0.015 percent of the total weight of the acrylamide, the 2-acrylamide-2-methylpropanesulfonic acid and the dimethylhexadecylallylammonium chloride; the oil phase initiator was azobisisobutyronitrile added in an amount of 0.012% by weight of perfluorobutyl ethylene.
Example 4
A preparation method of a resistance reducing agent for slickwater comprises the following preparation steps:
s1, uniformly mixing 25 parts by weight of acrylamide, 8 parts by weight of 2-acrylamido-2-methylpropanesulfonic acid, 7 parts by weight of dimethylhexadecylallylammonium chloride and 100 parts by weight of water to form a water-phase reaction solution;
s2, uniformly mixing 8 parts by weight of perfluorobutyl ethylene, 4 parts by weight of emulsifier and 40 parts by weight of white oil to form an oil phase reaction solution; wherein the emulsifier is a mixture of TW60 and TX-4, and the weight ratio of the TW60 to the TX-4 is 1: 1.1;
s3, uniformly mixing the oil-phase reaction solution and the water-phase reaction solution, introducing nitrogen to remove oxygen under the stirring condition, heating to 55 ℃, dropwise adding a water-phase initiator and an oil-phase initiator, and continuously reacting for 4 hours to obtain a resistance reducing agent; wherein the water phase initiator is ammonium persulfate, and the addition amount of the ammonium persulfate is 0.012 percent of the total weight of the acrylamide, the 2-acrylamido-2-methylpropanesulfonic acid and the dimethyl hexadecyl allyl ammonium chloride; the oil phase initiator is azobisisobutyronitrile, and the addition amount of the azodiisobutyronitrile is 0.010 percent of the weight of the perfluorobutyl ethylene.
Example 5
A preparation method of a resistance reducing agent for slickwater comprises the following preparation steps:
s1, uniformly mixing 22 parts by weight of acrylamide, 8 parts by weight of 2-acrylamido-2-methylpropanesulfonic acid, 10 parts by weight of dimethylhexadecylallylammonium chloride and 100 parts by weight of water to form a water-phase reaction solution;
s2, uniformly mixing 6 parts by weight of perfluorobutyl ethylene, 5 parts by weight of emulsifier and 40 parts by weight of white oil to form an oil phase reaction solution; wherein the emulsifier is a mixture of TW60 and TX-4, and the weight ratio of the TW60 to the TX-4 is 1: 0.9;
s3, uniformly mixing the oil-phase reaction solution and the water-phase reaction solution, introducing nitrogen to remove oxygen under the stirring condition, heating to 55 ℃, dropwise adding a water-phase initiator and an oil-phase initiator, and continuously reacting for 5 hours to obtain a resistance reducing agent; wherein the water phase initiator is ammonium persulfate, and the addition amount of the ammonium persulfate is 0.015 percent of the total weight of the acrylamide, the 2-acrylamide-2-methylpropanesulfonic acid and the dimethylhexadecylallylammonium chloride; the oil phase initiator was azobisisobutyronitrile added in an amount of 0.012% by weight of perfluorobutyl ethylene.
And (3) performance testing:
the resistance reducers prepared in examples 1 to 5 were added to water and formulated into 0.1 wt.% aqueous solutions, according to standard NB/T14003.1-2005 shale gas fracturing fluid part one: the slippery water performance index and the evaluation method "are used for performance evaluation, and the results are shown in table 1.
Table 1: resistance reducing agent performance
Figure BDA0002262342270000051
As shown in Table 1, the surface tensions of the resistance reducers in examples 1 to 5 are all less than 28mN/m, the interfacial tensions are all less than 2mN/m, the resistance reduction rates are all greater than 70%, and the CST ratios are all less than 1.5, so that the resistance reducers prepared in examples 1 to 5 have better performances in drainage assisting performance, anti-swelling performance and resistance reduction performance.

Claims (4)

1. A preparation method of a drag reducer for slickwater is characterized in that the drag reducer for slickwater is prepared by the following method, and the preparation method comprises the following specific steps:
s1, uniformly mixing 20-25 parts by weight of acrylamide, 5-10 parts by weight of 2-acrylamido-2-methylpropanesulfonic acid, 5-10 parts by weight of dimethylhexadecyl allyl ammonium chloride and 100 parts by weight of water to form a water-phase reaction solution;
s2, uniformly mixing 5-10 parts by weight of perfluorobutyl ethylene, 3-5 parts by weight of emulsifier and 40 parts by weight of white oil to form an oil phase reaction solution;
s3, uniformly mixing the oil-phase reaction liquid and the water-phase reaction liquid, introducing nitrogen to remove oxygen under the stirring condition, heating to 40-60 ℃, dropwise adding the water-phase initiator and the oil-phase initiator, and continuously reacting for 3-5 hours after dropwise adding is finished to obtain the resistance reducing agent.
2. The friction reducer for slickwater according to claim 1, wherein in step S2, the emulsifier is a mixture of TW60 and TX-4, and the weight ratio of the TW60 to the TX-4 is 1 (0.8-1.2).
3. The friction reducer for slickwater according to claim 1, wherein in step S3, the aqueous phase initiator is ammonium persulfate, and the addition amount of the ammonium persulfate is 0.01-0.015% of the total weight of acrylamide, 2-acrylamido-2-methylpropanesulfonic acid and dimethylhexadecylallylammonium chloride; the oil phase initiator is azobisisobutyronitrile, and the addition amount of the azodiisobutyronitrile is 0.008-0.012 percent of the weight of the perfluorobutyl ethylene.
4. The friction reducer for the slickwater prepared by the preparation method of the friction reducer for the slickwater according to any one of claims 1 to 3.
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Publication number Priority date Publication date Assignee Title
CN103755868A (en) * 2013-12-23 2014-04-30 郑州三山石油技术有限公司 Resistance reducing agent for fracturing quick water of shale gas and preparation method thereof
CN105419768A (en) * 2015-10-29 2016-03-23 中国石油集团渤海钻探工程有限公司 Instant water-in-oil resistance-reducing agent and preparation method thereof
CN106496409A (en) * 2016-10-25 2017-03-15 长江大学 A kind of multi-functional smooth concentrated liquid for having drag reducer, cleanup additive and clay stabilizer property concurrently
CN107236531A (en) * 2017-07-18 2017-10-10 中国石油集团渤海钻探工程有限公司 Shale gas pressure break environment-friendly type slippery water friction reducer and preparation method thereof
CN107523286A (en) * 2016-06-20 2017-12-29 深圳市百勤石油技术有限公司 A kind of cleaning slippery water fracturing fluid for shale reservoir and preparation method thereof
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CN110607171A (en) * 2018-06-15 2019-12-24 中国石油化工股份有限公司 Acidic foam slickwater for continental facies shale fracturing and preparation method thereof

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CN106496409A (en) * 2016-10-25 2017-03-15 长江大学 A kind of multi-functional smooth concentrated liquid for having drag reducer, cleanup additive and clay stabilizer property concurrently
CN107236531A (en) * 2017-07-18 2017-10-10 中国石油集团渤海钻探工程有限公司 Shale gas pressure break environment-friendly type slippery water friction reducer and preparation method thereof
CN109486478A (en) * 2017-09-13 2019-03-19 安庆五宁精细化工有限责任公司 Shale gas pressure break multi-functional friction reducer and preparation method thereof
CN110607171A (en) * 2018-06-15 2019-12-24 中国石油化工股份有限公司 Acidic foam slickwater for continental facies shale fracturing and preparation method thereof

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