<div style="line-height: 150%">Exploration and Development Model of Coalbed Methane in Liulin Area,China</div>
<div style="line-height: 150%">&nbsp;</div>

LI Yong,TANG Da-zhen,XU Hao,MENG Yan-jun

doi:10.11764/j.issn.1672-1926.2014.09.1462

Natural Gas Geoscience >

2014 , Vol. 25 >Issue 9: 1462 - 1469

DOI: https://doi.org/10.11764/j.issn.1672-1926.2014.09.1462

Exploration and Development Model of Coalbed Methane in Liulin Area,China

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(Coal Reservoir Laboratory of National Engineering Research Center of CBM Development and Utilization,School
of Energy Resources,China University of Geosciences,Beijing 100083,China)

Received date: 2014-01-21

Revised date: 2014-03-21

Online published: 2014-09-10

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Abstract

Liulin area is one of the key coalbed methane (CBM) development areas in China.Based on the regional geology analysis,the CBM composition,in-situ stress and geo-temperature field,and reservoir differences were illustrated.Additionally,the CBM well development effect,pumped layers choice,and well drilling technologies were systematically discussed.Results show that,the CH₄ content,Langmuir volume and gas saturation of Shanxi Formation are higher than those of the Taiyuan Formation.In-situ stress and geo-temperature field show vertical belting,and the 700m to 850m depth are the minimum horizontal principal stress.The coal properties are different from each other,and the hydrodynamic condition contributes much to the reservoiring difference.Vertical wells which penetrate coals in Shanxi Formation show better gas rate,while in Taiyuan Formation they are of higher water rate.Double-step and multi-branch horizontal wells were adopted,resulting in the full use of coals and better gas rate.Two cycles are proposed,including the inner cycle composed of in-situ stress,geo-temperature and reservoir pressure,and the outer cycle of permeability,gas rate and water rate.During CBM production,the inner cycle stimulates the outer cycle,while the reservoir reconstruction promotes the capability release and well production system maintains production balance.

Key words： Liulin area; Coalbed methane; In-situ stress; Reservoir evaluation; Balancing production

Cite this article

LI Yong,TANG Da-zhen,XU Hao,MENG Yan-jun .

Exploration and Development Model of Coalbed Methane in Liulin Area,China

[J]. Natural Gas Geoscience, 2014 , 25(9) : 1462 -1469 . DOI: 10.11764/j.issn.1672-1926.2014.09.1462

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