Impact Of Effective Stress And CH4-CO2 Counter-Diffusion On CO2 Enhanced Coalbed Methane Recovery

2008 ◽  
Author(s):  
Jishan Liu ◽  
Luke Connell ◽  
Zhejun Pan ◽  
Zhongwei Chen ◽  
Lai Zhou
Keyword(s):  
Effective Stress ◽  
Coalbed Methane ◽  
Methane Recovery ◽  
Enhanced Coalbed Methane Recovery ◽  
Enhanced Coalbed Methane ◽  
Counter Diffusion

scholarly journals A dynamic evolution model of coal permeability during enhanced coalbed methane recovery by N2 injection: experimental observations and numerical simulation

RSC Advances ◽  
2021 ◽  
Vol 11 (28) ◽  
pp. 17249-17258
Author(s):  
Bo Li ◽  
Junxiang Zhang ◽  
Zhiben Ding ◽  
Bo Wang ◽  
Peng Li
Keyword(s):  
Numerical Simulation ◽  
Effective Stress ◽  
Coalbed Methane ◽  
Evolution Model ◽  
Dynamic Evolution ◽  
Combined Effects ◽  
Methane Recovery ◽  
Coal Permeability ◽  
Enhanced Coalbed Methane Recovery ◽  
Enhanced Coalbed Methane

A dynamic evolution model of coal permeability during CH4 displacement by N2 injection was proposed, considering the combined effects of matrix swelling/shrinkage and effective stress, for providing a reference on N2-ECBM.

scholarly journals Influence and Sensitivity Study of Matrix Shrinkage and Swelling on Enhanced Coalbed Methane Production and CO2 Sequestration with Mixed Gas Injection

2011 ◽  
Vol 29 (6) ◽  
pp. 759-775 ◽  
Author(s):  
Fengde Zhou ◽  
Guangqing Yao ◽  
Zhonghua Tang ◽  
Oyinkepreye D. Orodu
Keyword(s):  
Methane Production ◽  
Coalbed Methane ◽  
Net Present Value ◽  
Sensitivity Study ◽  
Mixed Gas ◽  
Methane Recovery ◽  
Matrix Shrinkage ◽  
Enhanced Coalbed Methane Recovery ◽  
Shrinkage And Swelling ◽  
Enhanced Coalbed Methane

Matrix compressibility, shrinkage and swelling can cause profound changes in porosity and permeability of coalbed during gas sorption and desorption. These factors affect the distribution of pressure, methane production and CO2 sequestration. This paper compares the effects of cleat compression and matrix shrinkage and swelling models with the injection of different compositional gas mixtures (CO2 and N2). It shows that well performance, pressure distribution and properties of the seam are strongly affected by matrix shrinkage and swelling. Matrix shrinkage and swelling also affects net present value of the enhanced coalbed methane recovery scheme. In order to select the best enhanced coalbed methane recovery schemes, economic evaluation and sensitivity studies are necessary.

Thermo-hydro-mechanical-chemical couplings controlling CH4 production and CO2 sequestration in enhanced coalbed methane recovery

Energy ◽  
2019 ◽  
Vol 173 ◽  
pp. 1054-1077 ◽  
Author(s):  
Chaojun Fan ◽  
Derek Elsworth ◽  
Sheng Li ◽  
Lijun Zhou ◽  
Zhenhua Yang ◽  
...  
Keyword(s):  
Coalbed Methane ◽  
Co2 Sequestration ◽  
Methane Recovery ◽  
Enhanced Coalbed Methane Recovery ◽  
Ch4 Production ◽  
Enhanced Coalbed Methane
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