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Coal underground gasification and coalbed methane collaborative mining method and structure and construction method

A technology of underground gasification and mining methods, applied in the direction of coal gasification, underground mining, mining fluids, etc., can solve the problems that cannot be effectively used or collected, so as to ensure safe coal mining, ensure safe and efficient extraction, and improve connectivity Effect

Pending Publication Date: 2020-12-15
XIAN UNIV OF SCI & TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Underground coal gasification can generate a large amount of heat energy when it is burned underground. At present, this part of heat energy is usually dissipated directly and cannot be effectively used or collected.

Method used

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  • Coal underground gasification and coalbed methane collaborative mining method and structure and construction method

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Embodiment Construction

[0042] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but should not be used to limit the scope of the present invention.

[0043] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right" , "vertical", "horizontal", "top", "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing this The embodiments and simplified descriptions of the invention do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed a...

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Abstract

The invention relates to the technical field of coal mining, in particular to a coal underground gasification and coalbed methane collaborative mining method and structure and a construction method. The coal underground gasification and coalbed methane collaborative mining method comprises the following steps that in a target coalbed, coal underground gasification is carried out on a lower coalbed, and coalbed methane extraction is carried out on an upper coalbed at the same time, wherein the lower coalbed is adjacent to the upper coalbed, and the lower coalbed is located below the upper coalbed. The method aims to combine coal underground gasification with coalbed methane exploitation, fully exploit coal underground gasification for complex difficult-to-exploit coalbeds, fully utilize heat generated by coal underground gasification, further assist in extraction of coalbed gas in the upper coalbed, further reduce the content of coalbed gas in the coalbeds and guarantee safe and efficient extraction of coal.

Description

technical field [0001] The invention relates to the technical field of coal mining, in particular to a collaborative mining method, structure and construction method of underground coal gasification and coal bed gas. Background technique [0002] Coalbed methane is a co-associated mineral resource of coal and an important unconventional natural gas resource. However, the "three lows" of my country's coalbed methane travel permeability, low pressure coefficient, and low adsorption saturation have seriously restricted the efficient exploitation of coalbed methane. Formation heat-increasing mining is an emerging coalbed methane mining method. It is considered to be an effective way to increase coalbed methane production by increasing the reservoir temperature to increase the desorption amount of coalbed methane, and then increase the production of single wells. Usually consume a lot of energy, the scope of application is limited, and it is difficult to be effectively promoted. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/00E21B43/295E21B43/24
CPCE21B43/006E21B43/295E21B43/24
Inventor 孙杰郭婵妤侯恩科张春林潘海洋殷榕蔚左卿伶
Owner XIAN UNIV OF SCI & TECH
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