Surfactant fracturing fluid system and preparation method thereof

Abstract

The invention discloses a surfactant fracturing fluid system, which is composed of the following components according to mass percentage: 0.3% to 0.5% of long-chain alkyl amidopropyl dimethyl amine oxide, 0.15% of long-chain alkyl amido betaine % ~ 0.4%, additives 0.1% ~ 0.2%, the balance is water. The invention also discloses a preparation method of the surfactant fracturing fluid system: dissolve the additive in water at normal temperature and pressure, then add long-chain alkylamide betaine and long-chain alkylamide propyl dimethyl Amine oxide, stir well, and serve. The surfactant fracturing fluid system of the present invention has low damage to the formation, less pollution, does not need to add chemical agents to break the gel, has a strong flowback ability, and the fracturing fluid residue content is almost zero, and can effectively stabilize clay and make fracturing The skin effect and oil layer pollution in the process are smaller, even close to zero pollution, which can more effectively increase the productivity of oil wells and achieve the purpose of fracturing oil and gas reservoirs. The preparation method of the invention is simple to operate, environment-friendly and suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of oil field fracturing fluid, and in particular relates to a surfactant fracturing fluid system, and also relates to a preparation method of the surfactant fracturing fluid system. Background technique [0002] Fracturing fluid plays a very important role in oil production. As a fracture-forming and sand-carrying medium, fracturing fluid can transmit pressure, form hydraulic fractures, and carry proppant into formation fractures. The improvement of its performance has been It has always been a research hotspot. The ideal fracturing fluid should have a sufficiently high viscosity during operation and construction, and turn into a low-viscosity fluid within a certain period of time after fracturing, so that it can flow back completely without causing pollution or damage to the formation. [0003] At present, the fracturing fluid thickeners at home and abroad are polymers such as hydroxypropyl guar gum. These...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a surfactant fracturing fluid system to solve the problem of poor water solubility of surfactant fracturing fluids in the prior art

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