Structural Interpretation of Seismic Profiles integrated with Reservoir Characteristics of Qadirpur Area

Abstract

 Two dimensional seismic interpretations have been carried out in the Central Indus Basin, Qadirpur area to confirm the reservoir characteristics of the producing Sui Main Limestone and Ranikot Formation and to delineate promising locations for test drilling into the Sui Main Limestone and Ranikot Formation. Interpretive results of time contour map indicate that most of the prospect zones of 5 to 10 milliseconds are in the southwest direction at Sui Main Limestone level and 10 to 20 milliseconds in the north and southwest direction at Ranikot level. Results also revealed that prospect zones tend to become thin in the northeast, while it becomes thick in the southwest. The above findings of this study narrate that subsequent changes in thicknesses may be attributed due to the presence of Mari-Kandkot High in the north of study area. Lithology, water saturation and hydrocarbon saturation indicate two productive zones within Sui Main Limestone. Average value of porosity for each productive zone ranges from 20 to 23%, water saturation from 18 to 20%, and hydrocarbon saturation from 78 to 82%. The total reservoir rock volume is calculated to be 8896 acres. The total volumetric recoverable gas reserves are 6.6 Trillion Cubic Feet (TCF).