Application of map analysis techniques for resolution of misties in seismic interpretation

Abstract

This work describes and illustrates a method of reconciling time contours derived from different vintages of seismic data. The problem has been looked at from an areal viewpoint in contrast to the loop adjustments followed in conventional methods.

The algorithm involves contouring two individual sets of data points exhibiting misties separately and estimating the differences in the maps by back interpolation. Trend surfaces of progressively higher order are fitted on the differences to arrive at the magnitude of corrections for each of the control points. The final map that is produced after incorporating the corrections, retains the structural features depicted by either of the data sets, while resolving most of the mistie effects. The method is suitable for routine application with the aid of a contour mapping package on a personal computer or workstation.

Seismic data from a sedimentary basin have been interpreted and processed using this approach to illustrate the method.