Abstract:
The basic objective of the study is to get preliminary understanding and knowledge of
the subsurface structures trend and stratigraphy of the cited area. Seismic
interpretation eventually resulted in outcomes as time and depth contour maps, which
assisted to understand the subsurface structures for further exploration.
Fort Abbas concession is part of Punjab platform which is a gentle eastward
monoclonal rise at the central Indus Basin. Seismic lines 921-FABS-01, 921-FABS-
04, 921-FABS-05 and 931-FABS-16A shot by OGDCL in year 1993-1994 in Fort
Abbas area. The seismic lines under study area are dip and strike lines. Seismic line
931-FABS-16A is a dip line that passes from the well (Fort Abbas-01). Other seismic
lines are dip lines. Drilling of Fort Abbas Well No. 1 was carried out to test the
hydrocarbon potentials of Kussak and Khewra (Cambrian) and Salt Range Formation
of Pre-Cambrian. Two prominent reflectors namely Sakesar and Kussak Formations
were marked on the seismic sections 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 sections. Based on these seismic maps the structure of the area was
interpreted as a gently dipping broad monocline.
