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Resistance reducing agent for slickwater, and preparation method thereof

A drag-reducing agent and slick water technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of increased transportation costs and storage costs, inconvenient continuous mixing, and reduced drag-reducing effect, reaching a good market Prospects for application and promotion, reduction of on-site preparation workload, and good drainage performance

Active Publication Date: 2020-02-04
CNPC BOHAI DRILLING ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Different chemical additives need to be transported to the site and stored in different areas, which will inevitably increase transportation costs and storage costs; during on-site fracturing construction, different chemical additives need to be measured separately through different pipelines at the same time, which brings inconvenience to the continuous mixing on site. Consume a lot of manpower and material resources
The multi-functional drag-reducing agent with resistance-reducing, drainage-aiding and anti-expansion integration can reduce transportation and storage costs, and is convenient for on-site mixing, so it has good development prospects and application potential. However, the current multi-functional drag-reducing agent is The method of compounding is used to directly compound the drag reducing agent, anti-swelling agent and drainage aid, and there are problems such as increasing the dosage or reducing the drag reducing effect; the second is to use the synthetic method, but the synthesized multi-functional drag reducing agent has the problem of synthesizing Disadvantages such as complex process and poor performance

Method used

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  • Resistance reducing agent for slickwater, and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0016] A preparation method of a drag reducing agent for slippery water, the preparation steps are as follows:

[0017] S1. Mix 20 parts by weight of acrylamide, 5 parts by weight of 2-acrylamido-2-methylpropanesulfonic acid, 5 parts by weight of dimethyl hexadecyl allyl ammonium chloride and 100 parts by weight of water, Form an aqueous phase reaction solution;

[0018] S2, 5 parts by weight of perfluorobutyl ethylene, 3 parts by weight of emulsifier and 40 parts by weight of white oil are mixed uniformly to form an oil phase reaction liquid; wherein, the emulsifier is a mixture of TW60 and TX-4, and the weight ratio of the two is 1:0.8;

[0019] S3. After mixing the oil phase reaction liquid and the water phase reaction liquid evenly, under the condition of stirring, pass nitrogen gas to deoxygenate, then raise the temperature to 40°C, add the water phase initiator and the oil phase initiator dropwise, and continue the reaction for 3 hours to obtain the drag reducing agent ...

Embodiment 2

[0021] A preparation method of a drag reducing agent for slippery water, the preparation steps are as follows:

[0022] S1. Mix 25 parts by weight of acrylamide, 5 parts by weight of 2-acrylamido-2-methylpropanesulfonic acid, 8 parts by weight of dimethyl hexadecyl allyl ammonium chloride and 100 parts by weight of water, Form an aqueous phase reaction solution;

[0023] S2, 10 parts by weight of perfluorobutyl ethylene, 5 parts by weight of emulsifier and 40 parts by weight of white oil are mixed uniformly to form an oil phase reaction liquid; wherein, the emulsifier is a mixture of TW60 and TX-4, and the weight ratio of the two is 1:1;

[0024] S3. After mixing the oil phase reaction liquid and the water phase reaction liquid evenly, under the condition of stirring, pass nitrogen gas to deoxygenate, then raise the temperature to 50°C, add the water phase initiator and the oil phase initiator dropwise, and continue the reaction for 4 hours to obtain the drag reducing agent ...

Embodiment 3

[0026] A preparation method of a drag reducing agent for slippery water, the preparation steps are as follows:

[0027] S1. Mix 25 parts by weight of acrylamide, 10 parts by weight of 2-acrylamido-2-methylpropanesulfonic acid, 10 parts by weight of dimethyl hexadecyl allyl ammonium chloride and 100 parts by weight of water, Form an aqueous phase reaction solution;

[0028] S2, 10 parts by weight of perfluorobutyl ethylene, 4 parts by weight of emulsifier and 40 parts by weight of white oil are uniformly mixed to form an oil phase reaction liquid; wherein, the emulsifier is a mixture of TW60 and TX-4, and the weight ratio of the two is 1:1.2;

[0029] S3. After mixing the oil phase reaction solution and the water phase reaction solution evenly, under the condition of stirring, pass nitrogen gas to remove oxygen, then raise the temperature to 60°C, add the water phase initiator and the oil phase initiator dropwise, and continue the reaction for 5 hours to obtain the drag reduci...

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Abstract

The invention discloses a resistance reducing agent for slickwater, and a preparation method thereof. The preparation steps comprise: S1, uniformly mixing acrylamide, 2-acrylamide-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; and S3, uniformly mixing the oil-phase reaction solution and the water-phase reaction solution, adding a water-phase initiator and an oil-phase initiator in a dropwise manner at 40-60 DEG C under an anaerobic stirring condition, and reacting for 3-5 h to obtain the product. According to the invention, the resistance reducing agent can effectively reduce friction resistance, surface tension, interfacial tension and CST ratio, so that the resistance reducing agent has good discharge aiding performance, good anti-swelling performance and good resistance reducing performance, andhas multiple effects; and the resistance reducing agent is simple to prepare and convenient to mix on site, so that the workload of on-site preparation can be effectively reduced, and the good marketapplication and popularization prospects can be achieved.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development, in particular to a drag reducing agent for slick water and a preparation method thereof. Background technique [0002] With the exploration and development of unconventional oil and gas resources such as shale oil and shale gas, slick water fracturing has attracted more and more attention. As the core additive of the slippery water system, the drag reducer needs to be mixed with additives such as drainage aids and anti-swelling agents to form a slippery water system due to its single performance. Different chemical additives need to be transported to the site and stored in different areas, which inevitably increases transportation costs and storage costs; during on-site fracturing construction, different chemical additives need to be measured separately through different pipelines at the same time, which brings inconvenience to the continuous mixing on site. It consumes a l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/58C08F226/02C08F214/18C09K8/68C09K8/88
CPCC08F220/56C09K8/68C09K8/882C09K2208/12
Inventor 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靖马晓敏
Owner CNPC BOHAI DRILLING ENG
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