Abstract:
To study reservoir rocks of the Mari Gas Field, the Petrophysical and Petrographical studies have been carried out in Mari X-I, X-2 & X-3 wells. The gas was encountered in Zone-B Limestone Kirthar Formation, commonly known as Habib Rahi Limestone and Goru B Reservoir which deep reservoir. From Petrophysical interpretations, the volume of shale varies [rom 30 to 80% while calculated porosity in these reservoir rocks, varies between 10-20%. As the wells were dry, therefore most of reservoir p011ion shows 70-100% of saturation of water and 0-30% of saturation of hydrocarbons. Twenty one core samples of cretaceous age from the Mari X-J, X-& X-3 were also collected for Petrographical study reservoir rocks. On the basis of the Petrographic study, these core samples fall within five different categories of lithologiy I.sandstone, glauconitic sandstone, glauco-arenites, limestone and claystone. The Petrographical
study ofcore sample also indicates effecti ve porosity of about 10-20%.
