2D SEISMIC DATA INTERPRETATION INTEGRATED WELL DATA CHARACTERIZATION OF JOYA MAIR, UPPER INDUS BASIN, PAKISTAN.

Abstract

This dissertation is based on structural and stratigraphic interpretation of seismic data using seismic techniques and well log analysis. The Joya Mair area lies in the upper Indus Basin in south east of Salt Range-Potwar Foreland Basin. It has hydrocarbon potential due to its anticlinal structures. For Seismic structural interpretation three horizons and two reverse faults were marked by using IHS Kingdom 8.8 version and construction of fault polygon, time contours and depth contours. The marked horizons were recognized using formation tops from wells and their depths were confirmed through correlation with synthetic seismogram. The purpose of time and depth contour maps was to understand the spatial geometry of the structures and the nature of geological structures as identified by the seismic section of the area. Seismic interpretation of the 2D data reveals that the study area has undergone severe deformation illustrated by the development of thrusts and back thrusts forming a triangular zone in the subsurface. The general trend of the structures is northwest southeast which indicated that the area lies in compressional regime. The reservoirs of Eocene occur at depth of about 2020.48 m from well tops. The interpreted horizons are Chorgali Formation and Sakesar Formation, which has the major petroleum potential in the study area. Petrophysical analysis of Minwal X-1 well indicated the hydrocarbon potential in marked reservoirs and gave approximately 66% of hydrocarbon saturation. Rock-physics validates the petrophysical results. Facies modelling marks the dominant lithology