Positive-pressure blasting device

Abstract

The invention discloses a positive-pressure blasting device, which solves the problem that ultra-shallow well crustless bomb high-energy gas fracturing cannot be directly realized in the prior art. The positive-pressure blasting device comprises a primer ignition system, a pressure generator and an initiation device. A bridge plug grain is arranged in the central hole of the pressure generator. The upper end of the pressure generator is connected with an ignition joint in a screwing way. The initiation device comprises a pressure initiation joint, a pressure initiation firing pin, a micro initiation core piece and a booster grain, wherein the booster grain, the micro initiation core piece and the pressure initiation firing pin are sequentially arranged in the center of the pressure initiation joint from the bottom to the top. The positive-pressure blasting device has the advantages that the combustion is ensured to be full during ultra-shallow well crustless bomb high-energy gas fracturing, the ultra-shallow well fracturing operation is smoothly realized, the filler is prevented from being discharged out of a hole and being failed, the explosion energy impact waves can decompose petroleum and natural gas hydrate solids into liquid and gas, and the collection and extraction of the generated liquid and gaseous natural gas hydrates are facilitated.

Description

technical field [0001] The invention belongs to the field of oil and gas exploration, and in particular relates to a positive pressure explosion device for forming a positive pressure and high temperature environment in the working interval before measures such as perforation blasting and fracturing. Background technique [0002] In the process of oil and gas and hydrate exploitation, because most of the inland block oilfields are in the middle and late stages, the formation energy is low, the permeability coefficient is low, and the hydrates are distributed unevenly in solid formations. During the completion of hydrate production and completion measures, under purely natural conditions, natural gas hydrates are distributed in the surface layer or shallow sea formations in a solid state, and it is basically impossible to achieve continuous scale drainage. Oil and gas wells with severe sand production are most resistant to negative pressure huff and puff. , high-energy gas ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a positive pressure detonation device to solve the problems existing in the prior art that can not be directly realized by high-energy gas fracturing in ultra-shallow wells question

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