Combined 3D spiral perforation simulation injection device and simulation method

Abstract

The invention relates to a combined 3D spiral perforation simulation injection device and a simulation method. The combined 3D spiral perforation simulation injection device is formed by communicatinga joint part, a plurality of connecting parts, a plurality of perforation parts and a tail joint and sequentially and detachably connecting the joint part, the connecting parts, the perforation partsand the tail joint. The perforating component comprises a body, an upper cover, a perforating ball seat and a water-soluble perforating hole, a ball seat hole is formed in the outer wall of the body,the perforating ball seat is arranged in the body, a fixing screw penetrates through a bolt hole in the upper cover and a bolt hole in a bolt connecting block to jack and fix the perforating ball seat, the perforating ball seat is provided with a water inlet, and the water inlet is communicated with a center hole in the upper end of the perforating component. The water-soluble perforation is a conical shell with a closed tip, the root of the water-soluble perforation is inserted into a hole of the perforation ball seat exposed from the ball seat hole, and the water-soluble perforation is madeof PVA polyvinyl alcohol water-soluble materials. According to the invention, the perforation quantity and the perforation angle can be flexibly adjusted, and simulation research of various 3D perforation modes is realized.

Description

technical field [0001] The invention relates to an injection device for simulating reservoir perforation in the fields of rock mechanics engineering, petroleum engineering, reservoir reconstruction, etc., and specifically relates to a combined 3D spiral perforation simulation injection device and a simulation method. Background technique [0002] At present, unconventional oil and gas resources such as shale oil and tight oil usually require large-scale hydraulic fracturing in the reservoir to form effective productivity. Sexual initial perforation. In recent years, hydraulic fracturing technology for unconventional reservoirs has gradually developed. The 3D perforation technology with non-perpendicular perforation axis and wellbore axis can generate more fracture initiation fractures in the reservoir, thereby increasing oil and gas migration channels and increasing production. Therefore, the simulation analysis of hydraulic fracture initiation and extension characteristics...

AI Technical Summary

Problems solved by technology

[0005] An object of the present invention is to provide a combined 3D spiral perforation simulation injection device, which is used to solve the problem that the current conventional perforation injection devices cannot simulate real perforation conditions, and at the same time can It is used to simulate and analyze the fracture initiation characteristics under the condition of 3D spiral perforation; another object of the present invention is to provide a simulation method for this combined 3D spiral perforation simulation injection device

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