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《Progress in Geophysics》 2014-05
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Research and application of quantitative geophysics recognition in high abundance of coalbed methane-rich region

CHEN Gui-wu;DONG Shou-hua;WU Hai-bo;WANG Hao-long;HUANG Ya-ping;School of resource and earth science,China University of mining and technology;  
In order to improve the precision of assessment in high abundance of coalbed methane-rich region,optimize the evaluation mode and perfect the portability and objective laws of evaluation system, this paper studied the accumulation mechanism of coalbed methane-rich region through the geological conditions of coalbed methane deposit,and selected gas content,coal seam thickness,fracture density,and overburden pressure as 4 level factors to evaluate high abundance of coalbed methane-rich region.Took a block of Sihe mine in Qinshui basin as representative and typical research area,the 4 factors were extracted from 3D seismic data volume in this area.Using the improved AHP weights to calculate each index weights,the weighted average model is adopted to establish a fuzzy comprehensive evaluation system in high abundance of coalbed methane-rich region.Tested by field investigation daily gas production of coalbed methane drilling,the results showed the evaluation results are in good agreement with the actual situation.In a word,applied the improved AHP in geophysics recognition in high abundance of coalbed methanerich region can quantitatively demonstrate the precise location and magnitude of the size of high abundance of coalbed methane-rich region,its evaluation is accurate and reliable,and has good applicability and portability.
【Fund】: 国家重点基础研究发展计划(973计划)项目(2009CB219603);; 江苏省自然科学基金(BK20130201)联合资助
【CateGory Index】: P618.13;P631
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