Fracturing fluid filtration device and calculation method for multi-branch fractures

Abstract

The invention belongs to the technical field of oil-gas field development, and particularly relates to a fracturing fluid filtration device for a multi-branch joint. The fracturing fluid filtration device comprises a fluid preparation feeding device, a stirring device, a filtration device and a liquid recovery device. The fluid preparation feeding device comprises a fluid preparation box, a feeding box, an electric pump, an electronic flowmeter, a water pipe and a valve. The stirring device includes a stirring barrel, a stirring motor and a mixer. The filtration device includes a main joint device, a branch joint device, a screw pump, an electronic flowmeter and a pressure gauge. The screw pump, the electronic flowmeters, the pressure gauge are connected in series between the liquid outlets of the filtration device and the stirring barrel. The liquid recovery device includes a valve, a liquid drainage pipe and a settling tank. The fracturing fluid filtration device has the beneficial effects that the dynamic process of gradual filtration in main and branch joints when the mixed fluid of fracturing fluid and a propping agent is pumped into the formation can be observed intuitively,and the fracturing fluid filtration device and a calculation method thereof can be realized in the dynamic spreading process of the propping agent.

Description

technical field [0001] The invention relates to a fracturing fluid filtration device and a calculation method for multi-branch fractures, belonging to the technical field of oil and gas field development. Background technique [0002] In the process of hydraulic fracturing, for oil and gas reservoirs with multi-branched fractures due to natural fractures, the leakage of fracturing fluid will be greatly increased due to the existence of natural fractures, which is directly related to the proppant advancing to the depth, so that The fracturing fluid is also affected in terms of sand carrying, sand spreading, and migration, which in turn affects the success or failure of construction. At present, most of the studies on fracturing fluid loss are based on theoretical calculation and software simulation, and the results obtained are relatively ideal, which cannot directly reflect the fluid loss in branch fractures. [0003] The conventional fracturing fluid fluid loss simulation ...

AI Technical Summary

Problems solved by technology

[0002] In the process of hydraulic fracturing, for oil and gas reservoirs with multi-branched fractures due to natural fractures, the leakage of fracturing fluid will be greatly increased due to the existence of natural fractures, which is directly related to the proppant advancing to the depth, so that The fracturing fluid is also affected in terms of sand carrying, sand spreading, and migration, which in turn affects the success or failure of construction

At present, most of the research on fracturing fluid leakage is through theoretical calculation and software simulation, and the results obtained are relatively ideal, which cannot directly reflect the fluid leakage in branch fractures.

[0003] The conventional fracturing fluid fluid loss simulation device can only simulate the fluid loss of a single fracture, and the experimental results are also relatively simple, such as the simulation device mentioned in the Chinese utility model patent application publication specification CN 204086078 U

Moreover, conventional fluid loss simulation devices cannot simulate the continuous and slow dynamic fluid loss process of fracturing fluid in multi-branch fractures and the migration, settlement, and laying of proppant in multi-branch fractures during the actual fracturing process.

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