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 resolve is inadequate illumination caused by the salt geometry and sharp contrast at the sediment/salt interfaces. In poorly illuminated areas, undesired events and strong coherent noise, such as residual multiples and migration swings, can overcome the weak signal to the extent that it cannot be observed in the image.

Over the past few years WesternGeco has introduced several technologies that significantly improve subsalt images. Join this webinar to learn how IGIE interpretation-guided image enhancement, converted wave attenuation (CWA), shot selection migration, and interpretation guided selective stacking (IGSS) boost the desired signal and suppress unwanted noise.