Evaluation of reservoir quality in lower Goru sands of sawan gas field, central Indus basin, Pakistan (T-1427) (MFN 8114)

Abstract

The Sawan Development and Production lease area lies in the Thar Desert, which geologically forms a platform slope area of the Middle Indus Basin. Tectonically, Sawan field lies on the southeastern limb ofthe.Jacobabad paleohigh. Sawan field has been divided by two main strike slip faults into three compartments south, center and north. All Sa wan wells under study falls in central compartment of Sa wan field. Reservoir quality of Sawan field was evaluated using the log facies interpretation from petrophysical logs, which were analyzed to get overall view of subsurface characteristic of reservoir sedimentation around southern side of J acobabad high. Petrophysical parameters were calculated from volume of shale, density, neutron porosity, and formation water resistivity. Prospective zone of Lower Goru "C sand" of wells Sawan-1, Sawan-2 and Sawan-8 were marked as reservoir zone through incorporating composite logs. Using Gamma ray log, lithe-curves of reservoir zone of three wells were correlated to interpret environment of deposition as tidal distributary channel, upper delta plain and distal delta front.