Several urgent problems faced by multi-component seismics in oil and gas exploration
WANG Yun1, WEN Pengfei2, LI Zongjie3, LIU Jia1, LI Mengze4
1. MWMC Group, School of Geophysics and Information Technology, China University of Geosciences(Beijing), Beijing 100083, China; 2. Key Laboratory of Marine Mineral Resources, Ministry of Natural Resources, Guangzhou, Guangdong 510075, China; 3. Research Institute of Petroleum Exploration and Production, Sinopec Northwest China Oilfield Company, Urumuqi, Xinjiang 830011, China; 4. BGP International, CNPC, Zhuozhou, Hebei 072751, China
Abstract：We first introduce present development of seismic anisotropy theories and multi-component seismic technology,and then aiming at the interests of petroleum industry,discuss the problems faced by the equivalent medium theories and their applications at home and aboard.It is obvious that the limitation of Thomsen's weak anisotropic theory needs to be re-considered for strong anisotropic media such as shale reservoirs and coal seams.To describe multi-azimuth and multi-scale fractured reservoirs,we need to start our research on monoclinic medium and improve the applicable equivalent theories.And for continental sedimentary reservoirs widely distributed,especially thin layered formations in China,we need to set up an orthogonal anisotropic model and re-delineate the characteristics of wave propagation to discriminate what causes P-wave anisotropic responses and what links shear-wave splitting and PP's anisotropics with respect to fractured reservoirs.Also we analyze the defects of X- and Y-component processing and multi-wave interpretation,and conclude that,the processing technique of multi-component seismic data can't match the need of oil and gas exploration and production,which seriously obstacles the application of multi-component seismics.Finally,we propose the most important researches to be started and traced,including methods of how to keep vector and kinetic characteristics during multi-component processing,methods of simultaneous and high-dimensional interpolation of X,Y,Z components,softwares for OVT sorting and stacking feasible to wide-azimuth PS data,methods of migrating PS-wave in OBS or OBN data with greatly rising and falling seafloor.
王赟, 文鹏飞, 李宗杰, 刘佳, 李孟泽. 多分量油气地震勘探技术急需解决的几个问题[J]. 石油地球物理勘探, 2020, 55(6): 1395-1406.
WANG Yun, WEN Pengfei, LI Zongjie, LIU Jia, LI Mengze. Several urgent problems faced by multi-component seismics in oil and gas exploration. Oil Geophysical Prospecting, 2020, 55(6): 1395-1406.
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