Abstract:
The study area (Chanda-02 well) is located at Latitude of 33° 13’ 55.316 ’’N
and Longitude of 71° 30’ 9.419 ’’E in Shakardara area in District Kohat of the Khyber
Pukhtonkhawa province. It is about 70 Km from Kohat city and is present in Kohat
sub-basin of Upper Indus basin.
Chanda-02 well lies in Kohat Basin which is the part of Upper Indus Basin. It
is an onshore basin bounded by Main Boundary Thrust on the northern side, Kurram
fault on the west, Surghar and Salt Ranges Thrust on the south and on the east by right
lateral Kalabagh fault. The Kohat-Potwar Basin is a part of Indian plate deformed by
Indian and Eurasian plate collision and over thrust of Himalayas on the north and
northeast.
The data provided to us included well tops and well logs (Gamma ray,
Resistivity, Bulk Density, Neutron) of Chanda-02. This was acquired from LMKR,
Islamabad with the prior approval from the Directorate General of Petroleum
Concession (DGPC).
The main purpose was to observe and evaluate the Petrophysical
characteristics of the well. Petrophysical analysis of well Chanda-02 included
marking the reservoir zones (pay zones) and carrying out log interpretation. Values of
volume of shale, density and neutron porosity as well as those obtained from
resistivity logs are calculated by different formulas. Water resistivity and saturation of
water and hydrocarbon are also calculated.
Results claim that there is one pay zone present in Chanda-02. There is a
presence of sandstone in Datta Formation. In Datta Formation pay zone has volume of
shale 3.81%, Effective porosity is 7.04%, water saturation is 13.92% and hydrocarbon
saturation is 86.07%
