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《Geophysical Prospecting for Petroleum》 2015-05
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Analysis on the encoding strategies of plane-wave least-square reverse time migration

Li Chuang;Huang Jianping;Li Zhenchun;Wang Rongrong;Li Qingyang;Liu Peijun;Department of Geophysics,China University of Petroleum;College of Information and Control Engineering,China University of Petroleum;  
Least-square reverse time migration delivers high resolution and amplitude-preserved images as it introduces the imaging problem into the least-square inversion framework.However,it also has the defect of poor efficiency.The paper presents the theory and workflow of plane-wave least-square reverse time migration(PLSRTM)with different encoding strategies including statistic encoding,dynamic encoding,hybrid encoding and random dynamic encoding.Eefficiency improvement is achieved by encoding enormous shot data to produce several plane-wave records.Numerical tests on Marmousi model and comparison with RTM results show that PLSRTM can produce images with higher quality and resolution efficiently compared with conventional RTM;and appropriate strategies should be chosen according to the imaging requirements to implement the PLSRTM since every encoding strategy has their own advantages.
【Fund】: 国家重点基础发展计划(973计划)项目(2014CB239006和2011CB202402);; 国家自然科学基金项目(41104069和41274124);; 中央高校科研业务费专项基金项目(R1401005A);; 大地测量与地球动力学国家重点实验室开放基金项目(SKLGED2015-5-2-EZ)联合资助
【CateGory Index】: P631.4
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