Abstract
East Java Basin is the back-arc basin and it was the result of collision between the Indian Plate and Sunda Microplate. East Java Basin was formed in Early Tertiary subduction and it is related on the process in Java. In the exploration of Indonesian Basin over years, East Java is one of the successful hydrocarbon producers in Indonesia. In East Java Basin especially Rembang Zone, The Middle Eocene Ngimbang Formation is known as source rock materials. It consists of sandstone, siltstone, limestone, shale, and coal seams. The objective of this research is to determine the hydrocarbon source rock potential based on geochemical analyses and thermal maturation by making basin model. The main target source rock formation is Middle Eocene Ngimbang Formation. Log, seismic, and geochemical sample are the primary data in this research. These methods help the sense of exploring the new hydrocarbon potential. According to geochemical analyses, the source rock potential within TOC value in this area is good – very good. Fine sediments of Middle Eocene Ngimbang Formation tend to produce oil and gas originated from kerogen types II/III. Furthermore, the migration pathway started from south to north. Generation, migration, accumulation, and preservation occurred in Early Miocene.
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