91抖阴

Significant recent advances in imaging technology range from acquisition to earth model building, signal processing, and migration algorithms. For example, wide-azimuth and Dual Coil Shooting multivessel full-azimuth acquisition have become the preferred acquisition methods because they notably improve illumination and signal-to-noise (S/N) ratio. Similar developments in anisotropic velocity model building and the use of full-waveform inversion (FWI) have further refined the model and reduce seismic data uncertainty. Reverse time migration has become the standard migration algorithm, resulting in great improvement in salt geometry accuracy. However, despite these advances, the interpretability of subsalt images remains a major challenge for deepwater subsalt oil exploration in many areas, such as basins of the Gulf of Mexico, Brazil, and West Africa, especially where steeply dipping targets are directly beneath complex salt canopies. The main issue to