Structural Interpretation of Kal Area by 2D Seismic Reflection Data (T-1361) (MFN 2227)

Abstract

The Seismic lines (952-GJN-52, 942-GJN-51, 942-GJN-48, 942-GJN-47 and 942-GJN46) were obtained from Directorate General of Petroleum Concessions (DG PC).These lines were shot by OGDCL in 1994 and 1995 in Kal area, which is located U8 Km SOLlth West of Rajian Oil Filed and 16 Km cast of Chak Naurang Oil Fields in Gujar Khan E.L. For interpretation of these Seismic sections, reflectors were marked on the basis of prominent retleetion from subsurface horizon due to change in lithology and tii l'li'action from deformed strata. Three prominent reflectors R 1, R2 and RJ were marked on the seismic sections on the basis of observed reflection events. The velocity intormation is in the form of average velocity at different time and is provided at selected COP'S. Csing the velocity panels given on seismic section for selected COP'S an average velocity selected from seismic section arrival time (two Ways) of marked reflectors, is determined. Using these arrival times and the estimate velocity the depth or each reflector has been calculated and is represented in the depth section. The TWT were posted on the base map to make a time contour map. Shales of the Patala Formation arc the source rocks. Sandstone of Khewra Formation of Cambrian age and Limestone of the Sakesar Formation of Eocene age are reservoir rock. The shale of the Chorgali and Kussak formation serve as the cap rocks for underlying limestone of Sakesar and sandstone or Khewra reservoirs respectively