2D seismic interpretation and petrophysical analysis of Fort Abbas, central Indus basin, Pakistan (P-1199) (MFN 6354)

Abstract

The basic objective of the study is to get preliminary understanding of the subsurface structures trend and stratigraphy of Fort Abbas area. Seismic data interpretation gives us the time and depth contour maps which helps us in understanding subsurface structures. Fort Abbas concession is a part of Punjab platform which is a gentle eastward monoclinal rise at the Central Indus Basin. Drilling of Fort Abbas well 1 was carried out to test the hydrocarbon potentials of Datta formation. Two prominent reflectors namely Datta and Ranikot were marked on the seismic section on the basis of time-depth chart and velocity information of these formations. Time and depth contour maps generated for the marked reflectors showed the presence of a monoclonal structure with gentle dip in western direction of the area whereas a closure is formed in the East margin of the area. The well Fort Abbas 1 is also drilled on the same closure. Petrophysical analysis of Fort Abbas well 1 was also done by different well logs which shows that the formations are water wet. The saturation of water and hydrocarbons are 70% and 30% respectively. There is one zone of interest according to the well logs of Fort Abbas 1 which is from 525m to 580m. Average porosities for Datta Sands are around 13% in the prospect area.