Fracturing working method of multi-stage hydraulic jet staged fracturing string

Abstract

The invention discloses a fracturing working method of a multilevel hydraulic spraying segmentation fracturing tubular column. The method comprises the following steps of S1, carrying out the drifting and well washing before loading the multilevel hydraulic spraying segmentation fracturing tubular column into a well; S2, assembling the multilevel hydraulic spraying segmentation fracturing tubular column; S3, loading a drilling tool into the well and adjusting the drilling tool to a construction position; and S4, installing a wellhead and a ground pipeline, and testing the pressure. The fracturing working method is simple, the multilevel spraying encapsulation tool is connected according to the stratum quantity needing to be acidified and fractured so as to carry out the fracturing construction on different stratums, so that six sections or more than six sections of hydraulic spraying and fracturing can be cooperatively constructed through a way for pulling the tubular column in one trip, the construction speed can be greatly increased through the serial connection of multiple spraying encapsulation tools, and the construction time can be saved.

Description

Technical field [0001] The invention relates to a fracturing method of multi-stage hydraulic jet segmented fracturing pipe string, which is used for well completion and production increase measures in the oil and natural gas drilling process, and relates to the technical field of acid fracturing construction tool design and manufacture. Background technique [0002] The hydraulic jet segmentation modification technology is a technology developed in the late 1990s and widely used abroad. It is a product of the combination of hydraulic jet and fracturing technology. It is a combination of perforation and fracturing stimulation measures and a pipe string to achieve water Flat well multi-stage construction technology, which can perform fracturing under various completion methods such as open hole, cement-consolidated casing, unconsolidated screen, etc., and is similar to packer, bridge plug, sand pack, and rubber plug technology. Compared with, construction efficiency can be greatly ...

AI Technical Summary

Problems solved by technology

[0005] 2. Segmented multi-layer fracturing tools with immovable pipe string hydraulic jet with sliding sleeve structure, packer optimization structure with sliding sleeve + backwash channel, etc. + one-time multi-layer fracturing QHY341 packer with step-by-step unsealing The development and application of domestic literature has been reported, but there is no mention of the technical content of the packer that can be selectively set, has a sliding sleeve structure and liquid flow channel control

However, limited by the nozzle material and the performance of the packer, if more than 3 sections are to be constructed, the pipe string needs to be replaced, which increases the operating cost and the operating cycle, and both economic and social benefits are disadvantageous.

[0012] 3. A single-stage spray gun with a packer is used for combined hydraulic jet fracturing. Due to the limitation of the material performance of the nozzle, continuous use of a single spray gun for more than 2 hours may cause the spray gun to fail due to excessive wear, and the packer may also be damaged due to Repeated setting leads to seal failure. At present, only 3 sections can be constructed. If more than 6 sections are designed and constructed, drilling tools need to be tripped out, which increases the construction cycle and operating costs.

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