FORMING A GEOLOGICAL MODEL

摘要

A method is provided for forming a geological model of a region of the earth. Seismic data are obtained from the region and include seismic traveltime uncertainty. A seismic velocity model of the region is also provided and includes velocity uncertainty. Ray tracing is performed on the seismic data using the velocity model to determine the three dimensional positions of a plurality of points of the region. The three dimensional positional uncertainties (7-12) of at least some of the points are calculated from the traveltime uncertainty, the velocity uncertainty, and uncertainty in the ray propagation direction. This is combined with the positions determined by the ray tracing to form a geological model.