In-situ methane combustion explosion energy-gathering perforation device with molecular sieve

Abstract

The invention discloses an in-situ methane combustion explosion energy-gathering perforation device with a molecular sieve. The in-situ methane combustion explosion energy-gathering perforation device comprises a body, the molecular sieve is fixedly connected to one end in the body, baffles are fixedly connected to the two sides of the molecular sieve, a plurality of first one-way valves are embedded in the two baffles, a fixing plate is fixedly connected to the end, away from the molecular sieve, of the body, and an ignition device is embedded in the center of the fixing plate. A concentration sensor is embedded in the bottom of the fixing plate, an air exhaust hole is formed in the part, between the ignition device and the concentration sensor, of the fixing plate, a plurality of second one-way valves are symmetrically embedded in the inner walls of the top and the bottom of the body, and the ignition device and the concentration sensor are both electrically connected with an external controller. The in-situ methane combustion explosion energy-gathering perforation device with the molecular sieve has the advantages that the device is clean and sanitary, in-situ methane desorbed from the underground is gathered into the body, the perforation depth is further improved in a multi-stage energy-gathered combustion explosion mode, the multi-time continuous operation capacity of energy-gathered perforation is enhanced, and the problem that the crack extension range is limited in conventional combustion explosion fracturing is solved.

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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