Abstract:
The Fimkassar is situated in the eastern part of the Potwar Sub Basin, having
cracked carbonate supply includes reservoir formations (Chorgali-Sakesar). The present
study aimed to understand the reservoir characteristics of the Sakesar Limestone of the
Fimkassar oil field. The reservoir petrophysical properties were compared with the
outcrop samples and the core analysis of Sakesar Limestone. Two wells of the Fimkassar
oil field were taken for interpretation. The petrophysical interpretation of Sakesar
Limestone of Fimkassar_01 estimated shale volume as 17.7% and porosity 16.68% and
permeability 0.50 mD, respectively. The average hydrocarbon saturation was 55.16% and
the water saturation was calculated as 44.33% and similarly, the reservoir characteristics
of Fimkassar_02 were estimated. The porosity and permeability are the important features
of the reservoir rock; therefore, the Sakesar Limestone’s outcrop and the core samples
were examined in a laboratory for porosity and permeability. The porosity calculated
from the outcrop sample was 0.68% to 11.65% and the core samples calculated porosity
was 3.86% to 10.76%. The lithological cross plots were helpful in lithological
identification and the cross plots of the modules versus density gives us the fluid type
present in the Formation. We can observe that the lower modules values correspond to
gas, relatively higher ones to the hydrocarbons. The correlation of the reservoir
properties calculated from petrophysical interpretation, outcrop and the core data analysis
show that Sakesar Limestone has hydrocarbon potential and is a good reservoir.
