High-order generalized screen propagator migration based on particle swarm optimization
He Run1, You Jia-Chun1, Liu Bin2, Wang Yan-Chun1, Deng Shi-Guang3, and Zhang Feng-Qi4
1. China University of Geosciences (Beijing), School of Geophysics and Information Technology, Beijing 100083, China.
2. Sinopec Geophysical Co., LTD, Shengli Branch, Dongying 257086, China.
3. Chinese Academy of Geological Sciences, Beijing 100037, China.
4. Petroleum Exploration and Production Research Institute, Beijing 100083, China.
Abstract：
Various migration methods have been proposed to image high-angle geological structures and media with strong lateral velocity variations; however, the problems of low precision and high computational cost remain unresolved. To describe the seismic wave propagation in media with lateral velocity variations and to image high-angle structures, we propose the generalized screen propagator based on particle swarm optimization (PSO-GSP), for the precise fitting of the single-square-root operator. We use the 2D SEG/EAGE salt model to test the proposed PSO-GSP migration method to image the faults beneath the salt dome and compare the results to those of the conventional high-order generalized screen propagator (GSP) migration and split-step Fourier (SSF) migration. Moreover, we use 2D marine data from the South China Sea to show that the PSO-GSP migration can better image strong reflectors than conventional imaging methods.
. High-order generalized screen propagator migration based on particle swarm optimization[J]. APPLIED GEOPHYSICS, 2017, 14(1): 64-72.
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2017, Vol. 14 
