MODEL BASED INVERSION TO EVALUATE EOCENE CARBONATE RESERVOIRS OF RAJIAN AREA, UPPER INDUS BASIN, PAKISTAN

Abstract

Rajian Oil field, which is situated in Eastern Potwar basin is considered the main target for a source of hydrocarbons in the Potwar Sub Basin. Rajian is discovered in 90’s for hydrocarbon production and is producing since then. The Rajian structure consist of tight fault bounded, snake- head anticlinal structure which trend North-East to SouthWest and mainly formed because of the compressional forces in the area due to highly deformed zone crustal restoration process was performed on 3D seismic cube of Twelveby-Twelve kilometre. This study is intended to predict the reservoir properties such as Porosity, Shale Volume and saturation of water and hydrocarbon. Model based inversion was performed to transform the amplitude data to acoustic impedance domain using accurate seismic to well tie and background impedance model