Preparation method of slick water fracturing fluid system for shale reservoir and pumping method thereof
A technology for fracturing fluid and shale oil, which is applied in the field of preparation of slick water fracturing fluid system for shale oil reservoirs. It can solve the problems of inability to adjust the viscosity of fracturing fluid and increase the settling velocity of fracturing fluid system, and achieve agitation rate Enhanced, enhanced oil recovery, improved permeability and support effects
Active Publication Date: 2022-04-26
大庆永铸石油技术开发有限公司
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Problems solved by technology
[0005] For this reason, the present invention provides a pumping method for a slick water fracturing fluid system for shale oil reservoirs, which can solve the technical problem that it is impossible to increase the oil recovery rate by adjusting the viscosity of the fracturing fluid and the settlement velocity of the fracturing fluid system in real time
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[0069] In order to make the objects and advantages of the present invention clearer, the present invention will be further described below in conjunction with the examples; it should be understood that the specific examples described here are only for explaining the present invention, and are not intended to limit the present invention.
[0070] Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present invention, and are not intended to limit the protection scope of the present invention.
[0071] It should be noted that, in the description of the present invention, terms such as "upper", "lower", "left", "right", "inner", "outer" and other indicated directions or positional relationships are based on the terms shown in the accompanying drawings. The direction or positional relationship shown is ...
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The invention relates to a method for preparing a slick water fracturing fluid system for shale oil reservoirs and a pumping method thereof. In step S1, a drag reducer, a clay stabilizer and a drainage aid are injected into a preparation chamber through a first feed port to form a first mixture ; Step S2, the surfactant is injected into the preparation chamber through the second feed port and stirred with the first mixture to form a fracturing fluid; Step S3, the central control unit obtains the fracturing fluid through the first detection device arranged in the preparation chamber Viscosity, to adjust the stirring efficiency of the stirring device and the feed amount of the second feed port; step S4, the central control unit opens the third solenoid valve to inject qualified fracturing fluid into the stirring chamber, and simultaneously opens the fourth solenoid valve to inject the fracturing fluid into the stirring chamber. Inject sand liquid and fracturing fluid to stir to form a fracturing fluid system; step S5, the central control unit opens the fifth solenoid valve, and the second detection device acquires the settlement velocity of the fracturing fluid system, and injects it into the wellbore to perform fracturing of the shale oil reservoir. fracture. The invention improves the oil recovery rate by setting a central control unit.
Description
technical field [0001] The invention relates to the field of slick water fracturing fluid systems, in particular to a method for preparing a slick water fracturing fluid system for shale oil reservoirs and a pumping method thereof. Background technique [0002] Commonly used fracturing fluids are mainly water-based fracturing fluids with guar gum and its modified products as thickeners. This fracturing fluid has been widely used in various oil and gas fields and has achieved good production stimulation effects. Traditional fracturing fluids Liquids cause damage to oil and gas layer rock minerals and oil and gas layer fluids. [0003] Slippery water is a fracturing fluid system for hydraulic fracturing of shale oil and gas reservoirs, and is one of the key fluids for shale gas development. Compared with the traditional gel fracturing fluid system, the slick water fracturing fluid system is widely used in shale gas development because of its high efficiency and low cost. Com...
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IPC IPC(8): E21B43/267C09K8/66
CPCC09K8/602C09K8/66E21B43/267
Inventor 侯大伟曾庆涛
Owner 大庆永铸石油技术开发有限公司