DRY HOLE ANALYSIS OF BASIRA-01 AND JUDGE-01 WELLS, GAMBAT AREA, CENTRAL INDUS BASIN, PAKISTAN

Abstract

Gambat area is located in Central Indus Basin, Pakistan. Geologically the area lies in an extensional regime. It is situated in Pannu-Aqil Graben which is located in between Mari-Kandhkot High in the north and Jacobabad-Khairpur high in the south. Dry hole analysis was performed to depict the reason of failure of the wells in the study area. 3D seismic and well log data was used to carry out subsurface structural interpretation, and reservoir evaluation respectively. Seismic interpretation inferred the presence of normal faults in the study area. Total three reflectors were marked including Top Upper Goru, Lower Goru, and B-Sand interval. Time and depth contour maps were generated to delineate the structural closure and integrity of the trapping mechanism. Similarly, petrophysical analysis was performed to confirm presence of Hydrocarbons and their seal whereas source was confirmed through literature review. After detailed review of the parameters of dry hole analysis, lack of structure and its closure was confirmed as the reason for well failures.