Seismic Data, Well Log Interpretation and Volumetric Estimation for Evaluation of Reservoir Properties of Turkwal Field, Upper Indus Basin, Pakistan (P-1146) (MFN 4905)

Abstract

The main purpose of the dissertation is to evaluate the structure and hydrocarbon potential using seismic and well log data of Turkwal area, Upper Indus Basin, Pakistan. Turkwal area lies in the Chakwal District of Punjab region in the Potwar sub-basin region of Upper Indus Basin Pakistan. The Potwar sub-basin is situated at the northern margin of the Pakistan in the western foothills of Himalaya. It comprises of the Potwar plateau, the Jhelum plain and the Salt Range. The Turkwal structure is thought to be enriched by potential hydrocarbon, trapped up dip from the depocentre of Soan depression. The targeted Formations were of Eocene, Permian and Cambrian age. For structural enhancement, five migrated seismic lines i.e. 96-PW-02, 96-PW-03, 96-PW-04, 96-PW-05 (dip lines) and 884-FMK-108 (strike line) were used. Time and depth contour maps of four horizons, Chorgali Formation, Sakesar Formation, Tobra Formation and Khewra Sandstone Formation were generated which confirmed the Pop up anticline structures in the subsurface. For petrophysical analysis one zone has been marked at the level of Chorgali Formation whereas two zones have been marked at the level of Sakesar Formation. The volumetric analysis was also done which inferred that Chorgali Formation is more promising as compared to Sakesar Formation on the basis of effective porosity, Vsh and Sw. Tobra Formation and Khewra Sandstone Formation were not evaluated due to lack of petrophysical data. Geoseismic section of the control line was equipped to better understand the structure and lithology of the area. Stratigraphic correlation technique was done for piecing together the informational content of the separated wells which include Pindori, Turkwal Deep-01, Fimkassar and Balkasar from North west to South east respectively.