3D Seismic Structural Interpretation And Sub-Surface Modeling Of Rajian Area, Eastern Potwar Basin, Pakistan

Abstract

The present study aims to carry out a seismic structural interpretation to map and model the subsurface geometries present in the Rajian area of the eastern Potwar subbasin. To achieve this objective 2D and 3D seismic data along with the well tops were acquired followed by the seismic interpretation. Creation of TWT and depth contour maps. Seismic interpretation confirms the presence of a duplex zone bounded by SRT as sole thrust from the bottom and a back thrust F4 as a roof thrust from the top and the presence of three imbricated fault sheets along F2, F3 whereas all these sheets also folded to form multiple stacking patterns providing positive geometries for the accumulation of hydrocarbons. Structural restoration was performed on move to understand the subsequent development of this deformation which shows sequential development as in sequence thrusting. Where, main displacement was transferred along basal decollement SRT and divided along imbrication F1, F2 and F3 to the roof thrust F4 which dipped towards south creating a stacked geometry and a passive roof duplex with maximum shortening at the Eocene level.