Diagenesis and Paragenesis in Miocene-Aged Carbonate Reservoir Rocks in the Nort West Java Basin

The North West Java Basin has very complex reservoir problems from depositional systems, successional facies, and lateral distribution and diagenesis problems related to reservoirs. This study aims to analyze and determine mineralogy and fossil susceptibility to the process and history of diagenesis in detail, which in turn will provide a comprehensive model of carbonate reservoir character. The data used are field data in the form of surface rock samples and pit data in the form of core, SWC, cutting, SEM, XRD, petrography, biostratigraphy, and petrophysics. Diagenesis and paragenesis processes play an important role in the development of reservoir characters since shortly after deposition from the early Miocene to the present day, and the diagenesis regimes are marine phreatic, freshwater phreatic to vadose and overland regimes. Mineralogy, packing, and cementation observed by microfacies describe the paragenesis that works starting from aragonite minerals, then calcite and dolomite, cement forms ranging from fibrous, equant blocky, syntaxial and present stylolite, dolomitization and placement of hydrocarbons