Abstract:
The main purpose of the study is to evaluate hydrocarbon potential of a well named
Sawan-007 in Sawan Gas Field, Lower Indus Basin, Pakistan. The Sawan field is located
in the south east of Miano block in the Thar Desert. 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 volcaniclastic sandstones of the lower
Goru “C-sand” Formation is typically 70 m thick and show very high porosities at a
reservoir temperature of 155°C and depths of 3250 meter to 3400 meter. Then the
reservoir was evaluated for the hydrocarbon potential in detail using set of equations and
different formation evaluation charts made by Schlumberger. The methodology adopted
to accomplish this task include; the measurements for the Shale volume by using Gamma
Ray Log, Porosities of the Reservoir zone by two different methods i.e. Sonic Log and
Neutron Log, Resistivity of water by using Spontaneous potential log, Saturation of water
in the zone of reservoir and Hydrocarbon saturation using Archie’s equation. The results
for the dissertation were then displayed in the form of excel sheets and graphs for the
better approach towards the task. These all displayed results show a good reservoir
quality.
