Resistance reducing agent for slickwater, and preparation method thereof

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...

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

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