Abstract:
The main objective of the study was to carry out petrophysical analysis to
evaluate the hydrocarbon potential of Qadirpur # 3 well. The purpose has been achieved
by utilizing complete suite of wire line logs and the available well data. All the reservoir
zones were evaluated for the hydrocarbon potential in detail using set of equations and
different formation evaluation charts made by Schlumberger. The methodology adopted
included measurement of shale volume by employing gamma ray log, estimation of
porosity using density and neutron log, estimation of effective porosity, calculation of
resistivity of water utilizing spontaneous potential log, evaluation of saturation of water
and hydrocarbon saturation using Archie equation. The Average Shale Volume calculated
in Sui Main Limestone Zone 3, Sui Upper Limestone Zone 2 and Habib Rahi Limestone
Zone 1 are 20.44%, 14.33% and 15.72% respectively. The Average Porosity determined
by NPHI (CNL) and RHOB (LLD) in Sui Main Limestone Zone 2, Sui Main Limestone
Zone 3 and Habib Rahi Limestone Zone 1 are 23.55%, 20.27% and 19.93% respectively.
The Average Effective Porosity determined in Sui Main Limestone Zone 3, Habib Rahi
Limestone Zone 1 and Sui Upper Limestone Zone 2 are 16.63%, 16.32% and 9.21%
respectively. The Average Water Saturation determined in Sui Upper Limestone Zone 2,
Habib Rahi Limestone Zone 1 and Sui Main Limestone Zone 3 are 75.67%, 11.97% and
23.71% respectively. The Average Hydrocarbon Saturation determined in Habib Rahi
Limestone Zone 1, Sui Main Limestone Zone 3 and Sui Upper Limestone Zone 2 are
88.02%, 64.52% and 24.23% respectively. The Density and Neutron cross plot chart
reveal the reservoir lithology of Qadirpur # 3 well as Sui Main Limestone and the Habib
Rahi Limestone. On the basis of above mentioned results the Habib Rahi Limestone Zone
1 and Sui Main Limestone Zone 3 are the productive reservoir zones of natural gas.
