Seismic Raytracing Of An Overturn Structure

Seismic exploration of the Witwatersrand Basin has greatly increased our<br>understanding of the structures within the basin over the last several<br>years. In most of our surveys, the seismic data have been sufficiently clear to determine the structures within the basin and the position of the<br>Central Rand Group. However, in several areas around the basin, complex<br>structures (such as overturn structures) exist. Where seismic profile lines<br>cross these structures, the seismic data become very confused, and<br>interpretation becomes very difficult. This is especially true of overturn<br>structures. In an attempt to better understand what happens seismically at<br>overturn structures, 2-D and 3-D raytracing were performed on a computer<br>model of an overturn structure within the Witwatersrand Basin. This<br>experiment was also an attempt to image such a structure.