Abstract:
The main purpose of the study is to evaluate hydrocarbon potential of a well named
Sawan-03B in Sawan Discovery Field, Southern/Lower Indus Basin, Pakistan. This
has been achieved by using complete suite of wire line logs and available well data.
This complete set of data is issued by Land Mark Resources (LMKR) Pakistan
with the prior permission of Directorate General of Petroleum Concessions
(DGPC), Pakistan. To complete the above mentioned task the all logs were
correlated to mark the horizon of interest i.e. reservoir zone. The reservoir rocks,
Cretaceous volcani-clastic sandstones of the lower Goru Formation, show very high
porosities at a reservoir temperature of 155°C and depths of 3390 to 3520 m.
Then the reservoir was evaluated for the hydrocarbon potential in detail using set of
equations and different formation evaluation charts made by Schlumberger Log
Interpretation Charts. The methodology adopted to accomplish this task include; the
measurements for the Shale volume/Clay by using Gamma Ray Log, Porosities of
the Reservoir zone by two different methods i.e. Sonic Log and Neutron Density
Log, Resistivity of water by using Spontaneous potential log,/Static Sp. Saturation
of water in the zone of reservoir and Hydrocarbon saturation using Archie equation.
The results for the dissertation were then displayed in the form of excel sheets and
graphs/Cross-Plots for the better approach towards the task. These all displayed
results show a good reservoir quality.
