next up previous [pdf]

Next: Introduction Up: Reproducible Documents

Wave-equation migration velocity analysis for anisotropic models on 2-D ExxonMobil field data

Yunyue (Elita) Li


I apply an anisotropic wave-equation migration velocity analysis (WEMVA) method on a 2-D ExxonMobil dataset. I start from the best anisotropic model available from seismic, walkaway VSPs and check shots. The initial gathers in the subsurface offset domain are already fairly well focused; however, after inversion using our WEMVA method, I obtain an image with better continuity and clearer faults. By looking at the angle gathers, it is easy to distinguish the contribution of the improved $ \eta $ model from the contribution of the velocity model.