Publications

Marine deposits make good reservoirs. Cibulakan Formation in Northwest Java Basin is one example of productive reservoir. Teluk Naga and Parang Tritis beach deposits are good examples of modern analogue to compare characteristics between the tertiary and recent beach deposits. This study reviews Cibulakan Formation characteristics based on previous studies including an assessment of sediment composition, texture of material and stratigraphy based on core and outcrops data compared with modern beach sands at Teluk Naga and Parang Tritis. Cibulakan Formation can be divided into two members, Upper Cibulakan Member and Lower Cibulakan Member. In this study, Upper Cibulakan Member comprises poorly consolidated greenish grey claystone to consolidated shale, containing dispersed silt, quartz sand, pyrite, glauconite, lignitic plant remains, foraminifera and shell fragments. Upper Cibulakan Member was deposited in shallow inner-outer neritic environment. Parang Tritis is a beach located in southern part of Java Island exactly at Yogyakarta province, Teluk Naga is a beach located in northern part of Java Island exactly at Banten province. Observation of modern sediments on both beaches used pipe coring methods. Data were collected from different places. Characterization of Parang Tritis beach shows more indications of wave dominated deposits than Teluk Naga sedimentological characteristics. The results of this study can be applied to hydrocarbon exploration based on the analogue between recent sediment and Tertiary formation.