An in-situ methane detonation energy-gathering perforating device with molecular sieves

Abstract

The invention discloses an in-situ methane explosion gathering energy perforating device with a molecular sieve, which includes a body, a molecular sieve is fixedly connected to one end of the body, baffles are fixedly connected to both sides of the molecular sieve, and baffles are embedded in the two baffles. Several first one-way valves, the end of the body away from the molecular sieve is fixed with a fixed plate, the center of the fixed plate is embedded with an ignition device, the bottom of the fixed plate is embedded with a concentration sensor, and the fixed plate between the ignition device and the concentration sensor is set. There are air extraction holes, a number of second one-way valves are symmetrically embedded on the inner wall of the top and bottom of the body, the ignition device and the concentration sensor are both electrically connected to the external controller. The advantage of the energy perforating device is that it is clean and hygienic, allowing the in-situ methane desorbed underground to gather in the body, further increasing the perforation depth through multi-stage energy-concentrating detonation, and enhancing the ability of multiple continuous operation of energy-concentrating perforation , which solves the problem of limited crack extension in conventional detonation fracturing.

Description

technical field [0001] The invention relates to the field of perforation for oil and gas wells in oil fields, in particular to an in-situ methane explosion gathering energy perforation device with molecular sieves. Background technique [0002] At present, shale gas wells mainly adopt horizontal well segmental fracturing technology, which can improve the productivity of horizontal wells by increasing the volume of reservoir stimulation, but this technology is complicated and consumes a lot of water (single well > 10000m 3 ), it is also easy to cause geological disasters such as groundwater pollution and earthquakes. Especially for the special geological characteristics of shale gas in western my country: deep, tight, and high-stress difference reservoirs, it is difficult to form a fracture network in shale reservoirs through hydraulic fracturing, and the high-energy gas fracturing method has poor safety of pyrotechnics , Small scale of crack expansion and other issues. B...

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Problems solved by technology

[0004] The purpose of the present invention is to provide an in-situ methane explosion gathering energy perforating device with molecular sieves. After the combustible gas is screened out through the molecular sieve, the device is ignited to complete the multi-stage energy gathering explosion perforation, which effectively solves the problem. Problems of single blast and energy-gathering perforation and insufficient perforation depth

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