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《Acta Geologica Sinica》 2008-10
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The Multi-Components Seismic Response of Vertical Fracture in Coal Beds and Its Probing

HE Bingshou1),PENG Suping2),ZHANG Huixing1),ZHANG Xiaoming1)1) Marine Geo-science College,Ocean University of China,Qingdao,Shandong,266100;2) China University of Mining and Technology,Beijing,100083  
Fracture detection plays an important role in coalbed methane exploitation and coal mine safe production.The well-developed vertical fractures are theoretically equivalent to transversely isotropic media with a horizontal symmetry(HTI).Using seismograms of HTI model,the paper studies multi-component seismic response of vertical fractures in coal beds,and polarization characteristics of P-SV wave.Based on the analysis above,this study analyzes practicability and mechanics of fracture azimuth inversion method using azimuth gather for the purpose of industrial application.The paper proposes a fracture parameters inversion technique using the stack profile of two horizontal components to gain occurrence of fractures of coal beds underground,and this method has been proved to be precise and reliable in field data processing.
【Fund】: 国家重点基础研究发展规划“973”项目(编号2002CB211707);; 国家高技术研究发展计划“863”项目(编号2006AA06Z203)资助的成果
【CateGory Index】: P631.4
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