2D SEISMIC INTERPRETATION AND PETROPHYSICAL ANALYSIS OF DINA BLOCK, EASTERN POTWAR, UPPER INDUS BASIN, PAKISTAN

Abstract

The basic goal of research work was to assess hydrocarbon potential and understanding subsurface structure of Dina Block Eastern Potwar Sub basin as well as to estimate the petrophysical parameters of Shahab-01A well by arithmetical equation with the use of well log data. The research work was based on two stages which were seismic and well log data. In the Pliocene to Middle Pleistocene there was extreme deformation in Eastern Potwar Sub basin during Himalayan orogeny. Structurally two structures found are anticlinal pop up structures and thrusted fault blocks produced due to the decollement by basement and confirmed by generation of time as well as depth contour maps and velocity analysis of two targeted horizons Chorgali and Sakesar Formations through seismic data. In second part of research area which was petrophysical analysis, two zones of interest marked were potential zones of Chorgali and Sakesar Formations. Hydrocarbon saturation of Chorgali and Sakesar formations are calculated as 62.25% and 71.27% whereas water saturation of Chorgali and Sakesar formations is calculated as 39.75% and 29.34% respectively. The status of Shahab-01A well was suspended because of mechanical failure (fishery) in which the drill bit falls and trapped into wellbore.