Abstract
Abstract Wide-angle refractions (often called ‘diving waves’) and reflections carry considerable information, particularly on the seismic velocity and hence the lithology of the subsurface. This complements interpretation of the shapes and configurations of reflectors derived from conventional seismic reflection profiles. Wide-angle seismic data may be of considerable assistance in improving multiple removal and prestack depth migration of reflection profiles. They are also of particular use for specialist problems such as imaging sediments beneath high-velocity layers caused by basalt or tabular salt and for undershooting complex structures such as those created by salt domes. I discuss first a range of methods for acquiring wide-angle data, including sonobuoys, ocean bottom seismometers and cables, two-ship profiles and long surface cables. The main processing and modelling techniques used to aid interpretation of the data are shown next, followed by a variety of case examples that illustrate the power of wide-angle techniques in regional studies.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
