Subsurface Velocity Determination By Grid Tomography of Depth Migrated Gathers
Subsurface Velocity Determination By Grid Tomography of Depth Migrated Gathers
复制标题
通过深度偏移聚集的网格层析成像确定地下速度
DOI:
10.1190/1.1885789
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发表时间:
1997
期刊:
影响因子:
--
通讯作者:
Z. Koren
中科院分区:
文献类型:
--
作者:
D. Kosloff;Uri I. Zackhem;Z. Koren
SUMMARY Determination of subsurface interval velocity is important for imaging by prestack migration, AVO studies and full waveform inversion. We propose a method which uses depth migrated gathers directly, and does not necessarily need a depth model. The approach is complementary to horizon based tomography. When a subsurface model can be identified, model-based tomography seems appropriate since it produces geologically constrained updates. However, if no depth model can be determined initially, a grid based approach is advisable, where one can update an interval velocity section without building a depth model.