Structural interpretation, petrophysical analysis and volumetric estimation of hydrocarbon reserves using seismic and well data, Dhodak field, middle Indus basin, Pakistan (T-1510) (MFN 4298)

Abstract

The main purpose of the dissertation is to evaluate tectonic style and hydrocarbon potential of the study area, in a part of Middle Indus Basin i.e. Dhodak field and delineation of potential leads for future prospects. The methodology adopted to accomplish this task includes; structural interpretation of 2-D seismic data, petrophysical interpretation and hydrocarbon reserve estimation. Seismic data analysis includes identification and marking of the different litho-logical horizons and names them according to the depths after correlation with the well data. The demarcation of different faults on these horizons is to develop the structural geometry. Seismic time and depth mapping is used to develop structural models for different marked stratigraphic horizons. From these models the concluded results differ from the previously structural models in terms of faults identification and correlation and interpretation of structure. Petrophysical analysis of the wells (Dhodak well-01 and Dhodak well-05) provides the petrophysical properties (volume of shale and sand, porosity, saturation of water and hydrocarbon and net pay zone) for the main reservoir zones (Lower Ranikot Formation and Pab Sandstone) these parameters are further used in the calculation of hydrocarbon reserve estimation. Hydrocarbon reserves estimation results based on the current observed parameters showed different potential for Dhodak gas and condensate field because of the difference in structural interpretation. This dissertation may help in delineation of potential leads for future prospects and further field development planning.