Petrophysical analysis of Sawan-007 well, southern Indus basin Pakistan (P-0851) (MFN 3015)

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.