Petrophysical evaluation of Chanda well-02 in Shakardara block, Kohat, upper Indus basin, Pakistan (P-0896) (MFN 3977)

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%