Unlock instant, AI-driven research and patent intelligence for your innovation.

A method of improving the recovery rate of coalbed methane

A coalbed methane and recovery technology, which is applied in the direction of mining fluid, earthwork drilling, wellbore/well components, etc., can solve the problems of low concentration of effective biological substrate, restriction of coal biodegradation, small contact area, etc.

Active Publication Date: 2016-07-06
TAIYUAN UNIV OF TECH
View PDF8 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the contact area between microorganisms and degradable components in coal is small, resulting in a low concentration of effective biological substrates in coal molecules, which seriously restricts the biodegradation of coal.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: the method for improving coalbed methane recovery

[0038] The specific steps of the method are as follows:

[0039] The first step is to select a certain area of ​​the Qinshui coalbed methane field in the target coalbed methane field, collect relevant geological data, collect coal seam coal samples and produced water samples where coalbed methane occurs, and use 16SrRNA gene clone library and qPCR to analyze the collected coal and produced water samples. Samples were tested for anaerobic flora;

[0040] The results show that the target coal seam of this CBM field is 3 # For coal, the in-situ temperature of the coal seam is 37°C, and the reservoir pressure is 5.6MPa. The methanogenic bacteria were mainly hydrogenotrophic Methanolobus, and the main bacteria were Proteobacteria and Firmicutes. Functional bacteria such as aromatic compound degrading bacteria, aliphatic compound degrading bacteria and cellulose degrading bacteria were detected in the bacteri...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for increasing the recovery rate of coalbed methane, comprising: (1) collecting target coalbed methane field data and cultivating microbial flora; (2) supercritical CO2 pretreatment; (3) increasing coalbed methane production through microbial degradation. The present invention uses the in-situ microbial flora of the coal seam, which can well adapt to the environment of the target coal seam; adopts the method of combining the enrichment of the mixed flora and the separation of single strains to improve the degradation ability of the microorganisms to the coal; and adopts supercritical CO2 pretreatment The method can effectively increase the interaction between coal and microorganisms, promote the biodegradation of coal, and increase the production of biomethane; the supercritical CO2 pretreatment adopted has low cost and has the potential to realize energy recycling.

Description

technical field [0001] The invention relates to a method for increasing the recovery rate of coalbed methane, comprising supercritical CO 2 Displacement technology, microbial degradation technology to increase production of coalbed methane, specifically a technology that utilizes supercritical CO 2 A method of changing the coal body structure to promote the biodegradation of coal to enhance the recovery of coalbed methane. Background technique [0002] The current situation of low extraction rate and utilization rate of coalbed methane seriously restricts the development of coalbed methane industry. How to increase the production of coalbed methane has become an important research content of today's coalbed methane development. Among many coalbed methane enhancement technologies, Microbially Enhanced Coal Bed Methane technology has become a current research hotspot because of its green, pollution-free, and ability to produce new coalbed methane. [0003] Microbial stimula...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): E21B43/22
CPCE21B43/006E21B43/16E21B43/164
Inventor 郭红光李治刚梁卫国王飞
Owner TAIYUAN UNIV OF TECH