Multipole composite deep penetration perforation device

Abstract

The invention discloses a multipole composite deep penetration perforation device which comprises at least one integral perforation unit, wherein the integral perforation unit includes a fracturing gun component (10) and a composite perforator (20), the fracturing gun component (10) comprises a barrel-shaped upper joint (1), a barrel-shaped fracturing gun body (2) and a barrel-shaped middle joint (7) which are fixedly connected from the top down; the fracturing gun body (2) is provided with a fracturing charge pillar (5); and a plurality of pressure-relief holes (22) are formed in the side wall of the fracturing gun body (2). When a hole channel is formed through perforating of perforating bullets in the composite perforator, explosive in two poles are excitated and burned step by step, and then high-temperature and high-pressure gas can be generated in a well casing and then enters the perforation hole channel directly. After repeated acting, pressure action time can be greatly prolonged, so that a relatively thin and unconventional hydrocarbon reservoir can be gas-fractured effectively, then hole and sew combined deep penetration can be formed, and the flow conductivity of the area adjacent to the well casing can be improved.

Description

technical field [0001] The invention relates to the technical field of petroleum exploration and development, in particular to a multi-stage composite deep-penetration perforating device for horizontal wells. Background technique [0002] Recently, unconventional oil and gas resources such as shale gas, coalbed methane, tight gas, and tight oil have become the key areas of global oil and gas exploration and development. Generally, unconventional oil and gas cannot be exploited by conventional perforation, fracturing methods and technical means. develop. Judging from the current experience of developing shale gas in foreign countries, such reservoirs are mainly developed by drilling horizontal wells and adopting large-volume multi-stage fracturing completion methods. Most of the horizontal wells are cased wells, and hydraulic fracturing is required to obtain productivity. Cased wells must be perforated to form a channel for fracturing fluid to enter the formation before hydr...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problem that traditional hydraulic fracturing and conventional perforation operations are not suitable for the production of thin oil and gas layers, the present invention provides a multi-stage composite deep penetration perforation device, the multi-stage composite deep penetration perforation device The device combines horizontal well perforation with multi-stage gas fracturing technology, and finally forms a deep penetration of the combination of pores and fractures in the formation, which solves the problem that thinner oil and gas layers can be directly put into production without hydraulic fracturing

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