Structural Interpretation And Determination Of Hydrocarbon Potential Of Bitrism Field By Using Seismic Inversion And Rock Physics Modeling, Lower Indus Basin Of Pakistan

Abstract

Bitrism gas field is recently developed gas field of the lower Indus basin. Objective of this research was to identify the subsurface structure of the area and to characterize reservoir potential of the Lower Goru Formation which is the main producing reservoir of Bitrism block. First, seismic interpretation of 2D seismic data is done for delineation of subsurface structure which show the presence of a normal faulting and existence of horst and graben structures. Petrophysical analysis is done on Fateh-01 well to know the reservoir properties of Lower Goru Formation.. Seismic inversion is a technique for making a connection between seismic data and interpretative elastic physical characteristics of potential reservoirs. Post-stack seismic inversion is used to estimate reservoir characteristics like as porosity and acoustic impedance in the calculation of reservoir characterization. The reservoir parameters, as well as fundamental variables such as acoustic impedance and porosity of the target zone, are delineated using post-stack time migrated seismic data (POSTM) and log data in this study. Seismic inversion and rock physics modeling were employed to finish this task. The method for inverting seismic data into acoustic impedance is essential to the study's main findings. Furthermore, a good wavelet representative of the given conditions is necessary for a positive outcome. Then, applying rock physics modeling is used to estimate the porosity, Volume of shale and water saturation of Lower Goru Formation.