This research work is an attempt to confirm the sub-surface Jurassic sequence present in the Meyal field and to delineate promising location for test drilling. The Meyal field, one of the major oil and gas producing fields, lies in the active foreland and thrust belt in the Potwar basin of Pakistan. Petroleum play components of the Jurassic sequence encountered in the Meyal field were analyzed by seismic and well log data, acquired in this area. Based on lithological interpretation, Jurassic sequence was divided into upper and lower parts. Petrophysical interpretation including formation water resistivity, water saturation, hydrocarbon saturation, and permeability suggests presence of potential reservoir in lower sandstone part of the Jurassic sequence. Wells are drilled at the top of the pop-up structure which are indicated by the time and depth contour maps to obtain overall structure of the area.

The Khewra Sandstone is widely distributed throughout the Potwar Basin of Pakistan. Its reservoir aspects are evaluated by the interpretation of well log data recorded from Kal-01 and Kal-02 wells in the Kal Oil Field, eastern Potwar Basin. The encountered thickness of the Khewra Sandstone in Kal-01and Kal-02 varies from 60 m to 120 m. On the basis of lithological interpretation from wireline logs the formation is divided into four facies: 1) shale interbedded with minor siltstone and sandstone, 2) sandstone with alternating siltstone and claystone/shale, 3) claystone /shale, siltstone interbedded with fine to medium grained sandstone and 4) fine to coarse grained sandstone with channels. The log derived average porosity in Khewra Sandstone is about 14-22% with permeability ranges from 20-58 mD. Thus, it possesses a large storage capacity for moveable hydrocarbons in Kal Oil Field. Facies 4, in the upper part of the Khewra Sandstone, is interpreted as potential reservoir interval with hydrocarbon saturation ranges from 77-79%. Based on isopach map, the formation is interpreted to be well developed in NE-SW which gradually thins basinward to the west and northwest direction. The play fairway analysis suggested very high chances of hydrocarbon entrapment is in the Kal Oil Field.

No abstract