Petrophysical analysis and rock physics of Raj east-01 well, Southern Indus basin, Pakistan (P-0913) (MFN 3652)

Abstract

The main objective of the study area was to understand the geological setting, perform the petro physical analysis to evaluate hydrocarbon potential and analyze elastic parameter to understand reservoir properties using rock physics of Raj East-01 well. The project was initiated by taking into account the exploration history of the area followed by comprehension of stratigraphy and tectonic settings. We established the petroleum system, performed the petro physical analysis and rock physics. The purpose has been achieved by utilizing complete suite of wire line logs and the available well data. This complete set of data had been issued by Land Mark Resources, Pakistan with the prior permission of Directorate General of Petroleum Concessions, Pakistan. To complete the above mentioned task, all the reservoir intervals were evaluated for the hydrocarbon potential in detail using set of equations and different formation evaluation charts made by Schlumberger. In this study the reservoir lies at depth of 6500 - 6678 ft in Sand A and Sand B of Lower Goru Formation of Early Cretaceous age. The methodology adopted to accomplish the petro physical interpretation of Raj East-01 well included measurement of shale volume by employing gamma ray log, estimation of porosity using density and neutron log, estimation of effective porosity, calculation of resistivity of water utilizing spontaneous potential log, evaluation of saturation of water and hydrocarbon saturation using Archie equation. The research also includes the rock physics part which was performed to evaluate the elastic properties of the reservoir zone. Primarily for rock physics primarily we used sonic logs and density logs. Rock physics was aimed to establish P-wave velocity (Vp), S-wave velocity (Vs), density, and their relationships to elastic modulus κ (bulk modulus) and μ (rigidity Modulus), porosity, pore fluid, temperature, pressure, etc. for given lithology and fluid types. The results for the dissertation were then displayed in the form of excel sheets and graphs for the better approach towards the task. Reservoir zone lies in Lower Goru Formation of Cretaceous age. The results of petro physical analysis and rock physics of Raj East-01 displayed good reservoir quality.