2-D Seismic Reflection Data Interpretation of for Abbas, Pakistan

Abstract

Fort Abbas concession is part of Punjab platform which is a gentle eastward monoclonal rise at the central Indus Basin. Seismic lines 931-FABS-33,931-FABS-34,931-FABS-35,931-FABS-36,931-FABS-37 shot by OGDCL in year 1994 in Fort Abbas area were obtained from DGPC. The seismic lines under study area are dip and strike lines. Seismic line 931-FABS-33 is a strike line that passes from the well (Fort Abbas-01). Other seismic lines are dip lines. Drilling of Fort Abbas Well No. I was carried out to test the hydrocarbon potentials of Kussak & Khewra (Cambrian) and Salt Range Formation of Pre-Cambrian. Three prominent reflectors namely Sakesar, Kussak and Khewra were marked on the seismic section on the basis of depth and velocity information of these formations. Time contour maps of the reflectors were produced using two-way time of the reflectors. Average velocities were used to find the depths of the formations for the seismic section. Based on these seismic maps the structure of the area was interpreted as a gently dipping broad monocline.