Hydraulic jet sectional temporary plugging infinite stage fracturing method

Abstract

The invention relates to a hydraulic jet sectional temporary plugging infinite stage fracturing method, which relates to the technical field of oil and gas exploitation. The method uses coiled tubingto lower a downhole tool to a predetermined position in a shaft, the reservoir at the predetermined position is subjected to hydraulic jet fracturing, and a formation fracture is formed; the positionsof the coiled tubing and the downhole tool are maintained, plugging fluid mixed with a temporary plugging agent is pumped from the wellhead, and directional temporary plugging is carried out on the formation fracture; and the coiled tubing is lifted to enable the downhole tool to reach multiple positions in need of fracturing in the shaft sequentially, the above hydraulic jet fracturing and directional formation fracture temporary plugging are repeated, and infinite fracturing in single string running is completed. The method can overcome the problems of wear failure of a packer after multiple times of use and failure of the formation fracturing at a casing slip sleeve in the existing infinite stage fracturing technology; and in combination of hydraulic jet fracturing and temporary fracture plugging, using of the packer to pack the formation is not needed, infinite fracturing in single string running is realized, and infinite stage fracturing for the reservoir is truly realized.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploitation, in particular to a novel infinite-stage fracturing method for reservoir reconstruction—a hydrojet staged temporary plugging infinite-stage fracturing method. Background technique [0002] In recent years, with the gradual development and improvement of exploration and development technology, more and more oil companies regard unconventional oil and gas resources as their future strategic goals. Statistics show that by the end of 2011, the total recoverable oil and gas resources in the world were 1,858.41 billion tons of oil equivalent, and the recoverable unconventional oil and gas resources were 856.80 billion tons of oil equivalent, accounting for 46.1% of the total recoverable oil and gas resources. Unconventional oil and gas resources have huge potential. However, compared with conventional oil and gas reservoirs, unconventional oil and gas reservoirs have low permeability, ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a hydraulic jet segmental temporary plugging infinite stage fracturing method, which can overcome the wear and tear failure of the packer in the existing infinite stage fracturing technology and the failure of the formation at the casing sliding sleeve. For the problem of fracturing failure, this method combines hydraulic jet fracturing and fracture temporary plugging, without the need to use packers to seal the formation, and realizes an unlimited number of fracturing in a string, and truly realizes unlimited stages of fracturing for reservoirs

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