Abstract:
Dhulian is located in the Central Potwar Zone and is broad east-west trending, doubly
plunging anticline. The aim of the study is to identify structures present in the area of
Dhulian through the interpretation of the Seismic data. A total number of 5 seismic
lines PDK-101, PDK-103, PDK-104, PDK-112 and PDK-113, well logs of Dhulian-
43 and a base map were provided to us by Directorate General of Petroleum
Concession (DGPC) from a Seismic survey conducted by O.G.D.C. in 1981 in the
area of Dhulian. Four prominent reflectors R1 (Chorgali Formation), R2 (Sakesar
Formation), R3 (Lockhart Formation) and R4 (Warcha) are marked on the Seismic
sections and mapped.
Two way travel time for each reflector was calculated and the average velocity
for each line was calculated by using Mean Line Method. Time and depth contour
maps were made for the four horizons and then plotted on computer software Rock
Works to view time and depth surfaces. These contour maps show a faulted anticline
subsurface structure favorable for hydrocarbon accumulation. Geoseismic sections,
representing seismic structures in terms of depth were prepared for the line PDK-104
and PDK-113 by using depth of horizons picked and formation thicknesses
encountered in well Dhulian-43.
