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《Geophysical Prospecting for Petroleum》 2015-03
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Research of least-squares reverse-time migration imaging method and its application

Guo Shujuan;Ma Fangzheng;Duan Xinbiao;Wang Li;Sinopec Geophysical Research Institute;Tongji University;Geophysical Technological Institute of Jiangsu Oilfield,SINOPEC;  
High fidelity imaging method is required by complex lithology reservoir exploration and development.Compared with the conventional migration method,least-squares migration imaging based on inversion theory could provide high resolution imaging with more fidelity for lithologic reservoir estimation,which is becoming a research focus and trend of migration imaging method.We establish the functional error,reserve-time de-migration data reconstruction algorithm,Hessian inverse preconditioned gradient calculation and inversion iteration updating based on Gauss-Newton method,to realize the leastsquares reverse-time migration imaging.In order to make it available to the field data,we study targeted data preprocessing and least-squares matching filter simulation data correction technology and build least square reserved-time migration workflow oriented to field data.The imaging results of least-squares reserve-time migration to an actual seismic data shows its advantages in imaging resolution and amplitude preservation,compared with conventional reverse-time migration technique.
【Fund】: 国家科技重大专项(2011ZX05014-001-002)专题资助
【CateGory Index】: P631.4
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