Open AccessInfluence of water injection on the desorption characteristics of coalbed methane
Author(s) -
Li Peng,
Du Feng,
Wang Fakai,
Zhang Pan,
Jiang Yuxiang,
Cui Bo
Publication year - 2020
Publication title -
energy science and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.638
H-Index - 29
ISSN - 2050-0505
DOI - 10.1002/ese3.806
Subject(s) - desorption , coalbed methane , coal , methane , coal mining , adsorption , petroleum engineering , permeability (electromagnetism) , produced water , chemistry , water injection (oil production) , environmental science , geology , membrane , biochemistry , organic chemistry
Hydraulic methods have been extensively employed to improve the production rate of commercially viable coalbed methane and prevent potential mining disasters resulting from the production of this methane by increasing the permeability of coal seams. In this paper, an experimental system with a stirrer was utilized to study the effects of water injection on the gas desorption characteristics of coal seams. Pressure‐released desorption values and total gas desorption values under conditions of different adsorption equilibrium pressures and water contents were determined. The results show that both the free gas and the adsorbed gas could be replaced by the injected water, causing the system pressure to increase significantly. When releasing the system pressure, the gas desorption value of the water‐injected coal sample was reduced. After water injection, the total desorption value of the coal was increased. Thus, water injection could help to promote coal gas desorption.