Abstract:
The study area is located in Potwar Sub Basin. To determine the hydrocarbon
prospects of the Eocene and Palaeocene strata, petrophysical analysis of Chorgali, Sakessar
and Lockhart formations is carried out using a complete suite of wireline logs. The
petrophysical results show good porosity ranging from 11 % to 3 % for Sakessar Formation,
7.5 % to 6 % for Chorgali Formation and 11.2 % to 3.5 % for Lockhart Limestone and volume
of shale ranging from 6 % to 12 % for Sakessar Formation, 7.6 % to 11 % for Chorgali
Formation and 13 % to 21 % for Lockhart Limestone in the studied wells. All of these three
wells turned out to be hydrocarbon saturated. The gas effect approves the reservoir
capabilities of the formations. The sequence stratigraphic results reveal that two sequences
are found in all the under investigated wells, showing the deposition of reservoir formations
in two cycles of transgression and regression. Sequence stratigraphic analysis from logs have
showed two facies associations in the Eocene and Paleocene sequences. The GR log
determines an inner to middle shelf environment for the Chorgali, Sakessar and Lockhart
formations. From the correlation of reservoir intervals in the three wells, it can be inferred
that the overall reservoir capability increases to the south.
