Fracturing method for improving gravel penetration rate of conglomerate and glutenite reservoirs

Abstract

The invention provides a fracturing method for improving the gravel penetration rate of conglomerate and glutenite reservoirs. The fracturing method comprises the steps that S10, fracturing fluid is pumped into a target reservoir at a preset high displacement, so that a main fracture is generated in the target reservoir; and S20, the fracturing fluid is pumped into the target reservoir at a preset low displacement lower than the preset high displacement for multiple times, and the pumping time of single-time pumping of the fracturing fluid is gradually prolonged along with the increase of the pumping times, so that variable-frequency cyclic fracturing is achieved. According to the fracturing method, a variable-frequency cyclic fracturing mode is adopted, the gravel penetration rate of hydraulic fractures can be effectively increased, the roughness of hydraulic fracture surfaces is reduced, seepage channels with high flow conductivity are formed in the conglomerate and glutenite reservoirs, and the fracturing method has important significance for increasing the single-well yield of the hydraulic fractures in the conglomerate and glutenite reservoirs and other gravel-containing reservoirs.

Description

technical field [0001] The invention relates to the technical field of hydraulic fracturing, in particular to a fracturing method for increasing the gravel penetration rate of conglomerate and glutenite reservoirs. Background technique [0002] China's conglomerate and glutenite reservoirs are rich in oil and are an important part of China's oil and gas resources. In order to obtain higher oil and gas production, hydraulic fracturing is often used as an important stimulation measure, but the difference in fracturing methods will lead to different roughness of hydraulic fracture surfaces, which in turn will lead to differences in single well production of the same type of reservoir. [0003] In order to improve the reservoir, dynamic multi-stage temporary plugging diversion fracturing technology, fixed-point multi-stage fracturing technology, directional perforation fracturing technology, fixed-surface perforation fracturing technology, segmented multi-cluster stress interfer...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a fracturing method for improving the gravel penetration rate of conglomerate and glutenite reservoirs, so as to solve the problems of low gravel penetration rate of hydraulic fractures and high roughness of hydraulic fracture surfaces in conventional hydraulic fracturing technology

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