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Plane-wave Least-square Reverse Time Migration with Source Polarity Encoding
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 77th EAGE Conference and Exhibition 2015, Jun 2015, Volume 2015, cp-451-00237
Abstract
Plane-wave least-square reverse time migration (PLSRTM) delivers high quality images but costs less computation compared with conventional least-square reverse time migration. However, a number of plane-waves are necessary for crosstalk suppression. The paper introduces source polarity encoding to the plane-waves to reach better suppression to crosstalk. Combined with randomized sampling approach, the computation cost of PLSRTM can be decreased a lot. Numerical tests on SEG rugged topography model verifies that the combination with source polarity encoding and randomized sampling can obviously improve the imaging result and computation cost of PLSRTM.