reservoir potential, net pay zone and 3d modeling of cretaceous pab formation in eastern suleiman range, pakistan

The eastern suleiman fold and thrust belt comprises of a thick cover of sedimentary sequences. despite of presence of completepetroleum system source, reservoir and seal rocks less attention was paid by the exploration and production companies to prospect. anintegrated approach is adopted to delineate reservoir potential and net pay zones in the clastic reservoirs of the cretaceous age widelydistributed in the area. wireline logs and migrated seismic reflection data were used for field development and optimization.petrophysical analysis reveals that pab sandstone of the cretaceous age is acting as a reservoir rock, whereas the ghazij shales of theeocene age are acting as a regional seal rock. a complete workflow is proposed for formation evaluation, and structural interpretationof the subsurface geology. based on wireline logs it is interpreted that the thickness of the pab sandstone varies from 250 m to 350 min the entire study area. the sandstone is massive with high porosity and intercalated layers of shales. faulted anticlinal structures arepresent in the study area which are favorable for the accumulation of hydrocarbon. 3d structural models and various seismic attributemodels were prepared to analyze the reservoir character of this clastic reservoir. based on wireline logs and seismic data clean sand,shaly sand and shale are marked as dominant facies in the study area. however, clean sand facies are more favorable to act as potentialnet pay zone.