IDENTIFIKASI RESERVOIR KARBONAT BERDASARKAN “PETROPHYSICAL ROCK TYPE”

Abstract This paper focused on the identification reservoir use petrophysical rock typing approach with pore geometry and structure (PGS) method. The identification of the type and composition of rock types, can obtain comprehensive understanding of geological aspects such as diagenesis and reservoir properties. Porosity and permeability data of the 113 core plug, which 13 have mercury injection capillary pressure (MICP) data, 48 thin sections from 3 wells are used. Facies, facies association and diagenetic history analyses are performed to understand the influence of facies, depositional environments and diagenesis to the development of petrophysical rock types (PRT). Packstone with larger foram, red algae, mollusks, and corals dominate the wells that have thin section. Diagenesis occur from marine until burial stage. Secondary porosity caused by dissolution on vadose stage. Keyword: Pore geometry and structure