Stereotomographic Picking In Practice

Stereotomography allows estimating velocity macro models from seismic reflection data. Compared to travel time tomography the specificity of the method is that it considers locally coherent events. As a result, Stereotomographic picking is easier and leads to a much denser coverage of the model. Several applications have demonstrated the efficiency but also the principal difficulties of the approach : regularization and picking. For picking, in order to retain the efficiency of the method, we propose a semi-automatic procedure. Starting from an initial automatic picking we propose various strategies for semi-automatic or interactive selections of the stereotomographic picks. We illustrate this procedure with an application to a PZ component OBC line on the Mahogany field.