2-D SEISMIC DATA INTERPRETATION AND PETROPHYSICAL ANALYSIS OF BHANGALI OIL FIELD, UPPER INDUS BASIN, PAKISTAN

Abstract

This research was conducted for structural analysis and hydrocarbon evaluation of Bhangali area, Upper Indus Basin, Pakistan. For subsurface investigation, seismic interpretation on 2D seismic lines was carried out. The first and foremost step of seismic interpretation was base map generation, followed by horizon marking. Two horizons (Sakesar and Chorgali formations) were marked based on time depth chart, considered to be most promising reservoir rocks in the study area. Utilizing marked horizons, time and depth contours were obtained, which depicted the popup structure bounded on both sides by thrust faults in subsurface. For identification of hydrocarbon bearing zones, petrophysical analysis of Bhangali-01 well was performed. Rock properties including volume of shale, volume of clean, hydrocarbon saturation and water saturation were estimated for both the formations via petrophysical analysis, which helped in evaluating the reservoir behavior. Petrophysical analysis revealed that the zone lying within Chorgali Formation showed more promising results as compared to the zone identified in Sakesar Limestone.