基于优化交错网格有限差分法的VSP逆时偏移

刘炜, 王彦春, 毕臣臣, 徐仲博

Reverse time migration of VSP data based on the optimal staggered-grid finite-difference method

LIU Wei, WANG Yan-Chun, BI Chen-Chen, XU Zhong-Bo

图3 不同差分算子长度时交错网格有限差分法在不同时刻的波场快照 a—传统交错网格有限差分法,M=5;b—优化交错网格有限差分法,M=5;c—传统交错网格有限差分法,M=10;d—优化交错网格有限差分法,M=10;从左至右依次为1 s和2.5 s

Fig.3 Snapshots by using different staggered-grid finite-difference methods and different operator lengths a—conventional staggered-grid finite-difference for M=5;b—optimal staggered-grid finite-difference for M=5;c—conventional staggered-grid finite-difference for M=10;d—optimal staggered-grid finite-difference for M=10;from left to right time at 1s and 2.5s