In many areas of the Gulf of Mexico, irregular salt bodies cover vast regions of hydrocarbon-producing sediments. Conventional “narrow-azimuth” seismic acquisition surveys in many cases have not been able to sufficiently illuminate the subsalt structures that trap these hydrocarbons. Even state-of-the-art imaging techniques cannot overcome the lack of illumination on these structures to properly image them. The basic problem, as Figure 1 illustrates, is the inherent 2D nature of conventional streamer acquisition. A seismic vessel towing several streamers is only able to record a narrow swath of the wavefield reflected back from the subsurface geology. This frequently means in cases...

First Page Preview

First page PDF preview
You do not currently have access to this article.