Jet packer ground simulation method applicable to multilevel hydraulic jet fracturing

Abstract

The invention discloses a jet packer ground simulation method applicable to multilevel hydraulic jet fracturing. The method comprises the following steps: a, connecting in series jet packers of corresponding amount and other required tools on a construction test string according to the required designed level amount of an oil well and a gas well, placing a steel ball in an inlet of the construction test string, and connecting a high-pressure pipeline; b, gradually increasing the discharge capacity, if a sliding sleeve is hit off by the steel ball and pushed to pass through a central pipe of the packer continually and enter a sliding sleeve standing joint connected onto the lower part of the packer, and a water hole of a spray gun normally jets water, performing next-level test for the jet packer; c, if the sliding sleeve is not hit off by the steel ball, checking the mounting position of the sliding sleeve and the gap between the sliding sleeve and the spray gun, checking the position of a shear pin, and performing the test and detection in step b; and repeating steps a, b and c until completing all set tests. With adoption of the method, opening of all packers and jet tools, and jet of the spray gun can be observed.

Description

technical field The invention relates to a ground simulation method for an isolation jet tool suitable for multi-stage hydraulic jet fracturing, which is used for well completion stimulation measures in the oil and gas drilling process, and relates to the technical field of ground detection of acid fracturing tools. Background technique Hydrojet segmental modification is the product of the combination of hydrojet and fracturing technology, involving perforation and fracturing stimulation measures; one string can be used to realize multi-stage construction in horizontal wells, and it can be used in open holes, cement-consolidated casings, and unconsolidated casings. Fracturing is carried out under various completion methods such as knotted screen pipes, and the construction efficiency can be greatly improved. Among the prior art, the following patent applications are related to packer technology: The publication number is CN102650202A, and the Chinese patent document publi...

AI Technical Summary

Problems solved by technology

However, in the prior art, there is no ground simulation test method for the multi-stage hydraulic jet isolation tool, which leads to the inability to correctly obtain the sealing performance of the isolation tool. Therefore, the number of tripping and replacement tools will increase, which increases the labor cost. strength, prolonging the construction period, and correspondingly increasing well control safety risks

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