Method for jointly increasing coalbed methane of external direct-current electric fields and micro-biological degradation

A technology of microbial degradation and DC electric field, which is applied in the direction of mining fluid, earthwork drilling, wellbore/well components, etc., can solve the problem of low production of coalbed methane in microbial stimulation, improve the redox microenvironment, optimize the community structure, improve reserve effect

Inactive Publication Date: 2019-09-20
TAIYUAN UNIV OF TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

This technology can effectively increase the production of biomethane, solve the problem of low production of coalbed methane by microbial stimulation, promote the popularization and application of microbial stimulation of coalbed methane technology, and help the sustainable development of coalbed methane industry

Method used

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  • Method for jointly increasing coalbed methane of external direct-current electric fields and micro-biological degradation
  • Method for jointly increasing coalbed methane of external direct-current electric fields and micro-biological degradation

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Embodiment 1

[0027] A method for increasing the production of coalbed methane by applying an external direct current electric field and microbial degradation, comprising the following steps:

[0028] (1) Collect geological and microbial data of coal reservoirs and enrich high-efficiency bacterial flora: collect the burial depth of the coal seam and the thickness of the coal seam of the target coal mine; collect the in-situ microbial flora of the target coal seam, and enrich and cultivate them into a stable Efficient flora;

[0029] (2) According to the geological data and terrain conditions, the injection well 9 is first drilled to the center of the thickness of the coal seam, and then the drill bit is changed to be horizontal and drilled in the direction of the production well 10 until the drill bit reaches the position of the production well 10. The culture fluid is injected into the injection well 9 to fracture the coal seam to increase the accessibility of microorganisms. Finally, the...

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Abstract

The invention discloses a method for jointly increasing coalbed methane of external direct-current electric fields and micro-biological degradation. The method includes the steps that (1) relative information of coal reservoir geology and microorganism is collected, and high solution bacteria are enriched; (2) well drilling is conducted, and a producing pattern is established; (3) a culture solution is fractured and injected into; (4) a direct current electric network is established; and (5) the high solution bacteria are injected, the electric field network is activated, and coalbed methane jointincreasing ofthe external direct-current electric fields and micro-biological degradation is achieved. According to themethod for jointly increasing the coalbed methane ofthe external direct-current electric fields and micro-biological degradation, in situ microbial flora more suitable for a target coal seam is used, the culture solution is used to fracture a coal reservoir and injected into, by simulation of the external electric fields, the structure and the activity of the microbial flora are improved, thus conversion of biogenic methane of coal is promoted, the reserves of the coal bed methane are improved, the permeability of the coal bed is improved, and the recovery efficiency of the coal bed methane is improved.

Description

technical field [0001] The invention relates to a method for increasing production of coal-bed methane by applying a direct-current electric field and microbial degradation, and belongs to the technical field of coal-bed methane exploitation. Background technique [0002] As an important part of natural gas, coalbed methane has attracted worldwide attention. The development and utilization of coalbed methane can not only alleviate the energy crisis, but also reduce the emission of greenhouse gases, which has high economic value and environmental significance. In order to meet the increasingly tense energy demand and reduce the impact of greenhouse gases on the environment, it is becoming more and more important to vigorously develop and utilize coalbed methane. Microbial stimulation of coalbed methane can increase coalbed methane reserves, improve coalbed physical properties, and enhance coalbed methane recovery by degrading organic matter in coal. It is one of the effectiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/22E21B43/16
CPCE21B43/006E21B43/16
Inventor 郭红光陈超梁卫国李治刚
Owner TAIYUAN UNIV OF TECH
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