Abstract:
This dissertation presents the 2D seismic interpretation of Ghauspur area in
the Central Indus Basin, which is located in the southeastern periphery of the Indian
plate. In the present study the most important purpose is to delineate subsurface
geology by seismic data interpretation, attribute analysis and to evaluate the potential
reservoir formations by petrophysical analysis. The data set includes seven 2D
seismic lines and a suite of wireline logs of Indus-1B and Badar South-01. Seismic
data analysis comprises identification, marking of reflectors and naming them
according to the depths after correlation with the well tops and VSP data.
Interpretation of seismic lines shows negative flower structure bounded by two
normal faults dipping in the NW to SE. Sui Main Limestone, Sui Upper Limestone
and Habib Rahi Limestone have been acting as the reservoir in the area. The
petrophysical parameters estimated effective porosity, hydrocarbon saturation and
volume of shale used to characterize the reservoir’s potential of the area. Reservoir
potential found in well Indus-1B for Sui Main Limestone is average Vshl 29%, total
porosity 15.45% and effective porosity 13.19%. Attribute analysis improved geologic
visualization and shows well Indus-1B has the presence of hydrocarbon because of
low frequency and low amplitude values. On the basis of seismic data interpretation,
petrophysical and attribute analyses, a new well location is proposed on the crestal
part of the structure i.e. its highest point lies at SP 750 on seismic line GHA94-16
with latitude 27o 53” 51 .024’N and longitude 69o 04” 5.97’E.
