Abstract:
The study area Safed koh anticlinorium is located in Punjab province of Pakistan.
The area has been identified as compressional regime and is characterized by the
Suleiman fold belt. The main purpose of research was to evaluate the prospects of
Mesozoic reservoirs of the Suleiman fold belt. The study area includes twelve 2D
migrated seismic sections and six wells. The area is important for its hydrocarbon
traps. The main reservoirs are the Pab sandstone, Parh limestone, Lower Goru sands,
Sembar sands Chiltan limestone and the Alozai Formation. Five horizons i.e.
Dunghan and Parh limestones, Lower Goru Formation, Chiltan and Alozai formations
were marked on the seismic sections with the help of synthetic seismogram of
Dewan-01 well. On the basis of time and depth contour maps, geological study and
interpretation of Google Earth image of the Safed Kho anticlinorium, isopachs maps
and the correlations of different wells it is concluded that the source rock for
hydrocarbon is the Sembar Formation. The hydrocarbon traps were most possibly
developed in these anticlines. Based on petrophysical studies such as determination of
the porosities, resistivity of water, saturation of water, movable hydrocarbons net to
gross reservoir, net reservoir and net pay confirmed the presence of clean sandstone
and limestone with variable porosity in the prospective zones. On Google Earth image
of Safedkoh anticlinorium, the surface structural style of Dodhak, Rodho, Afiband
and Zindapir anticlines has been delineated. The volumetric reserve calculation
showed that the four anticlinal structures of Safedkoh have more than two trillion
cubic feet of Gas in place in the Mesozoic reservoirs of the area.
