INTERPRETATION OF THREE-DIMENSIONAL (3-D) SEISMIC DATA SET OVER AN APPRAISED PROSPECT IN THE NIGER DELTA

Abstract

Realistic interpretation of three-dimensional (3-D) seismic data set calls for the full integration of the available geological and geophysical skills. The requirement for this full scale integration has necessitated the use of modern interactive workstation that run on powerful machines, and the co-ordination of seemingly unrelated aspect of studies and the pooling of ideas. In this study, the progress of this work was steered along support systems based on specialised packages that are the latest in the industry. The result of the 3-D interpretation has increased subsurface resolution of the prospect that has already been defined on the basis of an earlier 2-D interpretation procedure. Having thus properly defined the structure of interest, contour maps in time and depths were defined for each of the hydrocarbon-bearing (in this case oil) sands that are of commercial interest: the closures on the time maps are pointers to oil accumulation while the annotations on the depth maps give an idea of the approximate distance to the top of sand of interest.