Controllable pulse gas energy pressure cracking device

Abstract

A controllable pulse gas energy fracturing machine, which is used during oil gas well mining, comprises a gas energy fracturing device (3), an igniter or exploder (1) and a tail plug (5) which are respectively arranged at two ends of the gas energy fracturing device. The gas energy fracturing device is composed of gas energy fracturing assemblies (300). The gas energy fracturing assembly comprises a central pipe (301), an inner powder post (302) filled into the central pipe and an outer powder cylinder (305) arranged outside the central pipe. The wall of the central pipe is provided with decompression and igniting passages (303) and passage sealing covers (304). The igniter or exploder and the inner powder post are connected together through an ignition passage (7). The invention enables the communication of the effective extending net multi-crack structure and the wellbore at the vicinity of the well in the target bed by controlling rate of pressure increase, peak pressure, pressure platform and total energy of gas energy fracturing, and hence improving productivity of the oil gas well in a large scale. The invention also solves the problem of low productivity caused by uncontrollability of the fracturing process and ineffective communication between the stratum and the wellbore in the prior art.

Description

technical field [0001] The invention relates to a fracturing device used in the exploration and exploitation of underground oil, gas, water, etc., in particular to a controllable pulse gas energy fracturing device especially suitable for the exploitation of oil and gas wells. Background technique [0002] The key to improving the productivity of oil and gas wells lies in the degree of connectivity between the wellbore and the formation. [0003] High-energy gas fracturing technology is one of the stimulation measures for oil and gas wells. Its function is to form a network multi-fracture pattern in the zone near the wellbore of the target layer, so that the wellbore and the formation can form a high conductivity connection. High-energy gas fracturing technology is mainly divided into two categories: high-energy gas fracturing with shell and high-energy gas fracturing without shell. [0004] The structure of the existing shelled high-energy gas fracturing device limits the c...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a controllable pulse gas energy fracturing device, which solves the technical problems in the prior art that the fracturing process is uncontrollable, and the effective communication between the formation and the wellbore cannot be realized, resulting in low production capacity.

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