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- Title
考虑气水分布的煤层气解吸模型.
- Authors
彭泽阳; 李相方; 孙政
- Abstract
In order to clarify the influence of liquid in matrix pore of coal reservoir on desorption process,a capil⁃ lary bundle model has been established based on matrix characteristics and coalification. From this model,the proportion of pore affected by liquid in matrix is obtained. Then,Langmuir adsorption theory of solid-gas interface and solid-liquid interface theory are used to obtain different water conditions in matrix. The result shows that the existence of liquid water will greatly reduce the desorption capacity of coal reservoir,which is attributed to the existence of liquid water. On one hand,liquid will affect the gas desorption volume by affecting the proportion of solid-liquid interface desorption;on the other hand,liquid will trap the desorbed gas in micro-nano pore by forming capillary force. The research results lay a foundation for perfecting the theory of desorption and development of coalbed methane and optimizing the policy of development technology.
- Subjects
GAS-solid interfaces; SOLID-liquid interfaces; COALBED methane; GAS distribution; DESORPTION; ADSORPTION (Chemistry)
- Publication
Natural Gas Geoscience, 2019, Vol 30, Issue 10, p1415
- ISSN
1672-1926
- Publication type
Article
- DOI
10.11764/j.issn.1672-1926.2019.06.004