2D-INTEGRATED SEISMIC INTERPRETATION, PETROPHYSICAL ANALYSIS, FACIES ANALYSIS AND SEISMIC ATTRIBUTES OF MISSAKESWAL AREA, UPPER INDUS BASIN, PAKISTAN

Abstract

Pakistan has a high potential of oil/gas reserves in its geological provinces of Upper and Lower Indus basin as well as the Balochistan basin. Similarly our study area, of Missakeswal which is located near Gujar Khan in the district of Rawalpindi. Geologically the study area is situated in the Potwar basin bounded by strike slip faults, namely Jhelum fault in the east and Kalabagh fault in the west. The study focuses on the use of well log and 2D seismic data for the characterization of the reservoir potential of the Paleocene succession. . Reservoir characterization combines surface seismic with borehole seismic, well data i.e petrophysical data and rock and fluid properties and production history. Results are indicative that khewra sandstone of Cambrian age serve as potentially good reservoir rocks. Petrophysical analysis confirm the presence of a high percentage of hydrocarbon saturation. The results of the petrophyscial analysis correlated with the facies analysis of the reservoir zone indicate that our prospect zone lies sandstone reservoir which also has shale content that can be identified, and effective porosity measures of the reservoir prove that our study area is a good area for drilling to extract hydrocarbons. The pop-up anticline structure proves a good trap and our study area is a good zone of future exploration prospects. Facies modeling being one of the important tool for the confirmation of lithologies. In this thesis, with the help of facies analysis of MISSAKESWAL-03 well, we came to the result revealing sandstone as the reservoir lithology.