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Desorption-diffusion model and lost gas quantity estimation of coalbed methane from coal core under drilling fluid medium |
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| Authors: | YANG ZhaoBiao QIN Yong WANG ZhaoFeng Geoff WANG & WU CaiFang School of Mineral Resources Geoscience China University of Mining & Technology Xuzhou China Safety College Henan Polytechnic University Jiaozuo School of Engineering University of Queensl ST Lucia QLD Australia |
| Affiliation: | YANG ZhaoBiao1,QIN Yong1,WANG ZhaoFeng2,Geoff WANG3 & WU CaiFang1 1 School of Mineral Resources , Geoscience,China University of Mining & Technology,Xuzhou 221008,China,2 Safety College,Henan Polytechnic University,Jiaozuo 454000,3 School of Engineering,University of Queensl,,ST Lucia QLD 4072,Australia |
| Abstract: | The differences of coalbed methane(CBM) desorption-diffusion from coal drilling-core under various drilling fluid medium are not considered in the present calculating methods of lost CBM quantity,which leads possibly to the inaccuracy of CBM quantity in coal seam.Here we took the desorption of CBM from coal core under drilling fluid medium as a pressure-swing process,and based on the Langmuir equation and Fick-first law,established the desorption-diffusion model and numerical modeling method of lost gas(inc... |
| Keywords: | drilling fluid CBM lost gas quantity desorption-diffusion model numerical modeling method |
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