MODELLING OF BASIN AND SOURCE ROCK MATURITY BASED ON BURIAL HISTORIY ANALYSIS ON JAMBI MERANG BLOCK AREA

• Main Author: Hanif, Irfan
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/66495
• Institution: Institut Teknologi Bandung

South Sumatera Basin as a main provider of hydrocarbon reserve in Indonesia is one of important objects in developing oil and gas source. The insight of the burial history in a basin and source rock maturity modelling in this basin can also assist a further development of oil and gas field. Jambi Merang Block area, which is part of the South Sumatra Basin, is adequate in terms of data availability for integration which can produce a basin and maturity model based on an analysis of burial history. The study in this thesis utilizes five well data along with geochemical data to identify source rock. Furthermore, the process also includes biomarker data analysis to decide depositional environment origin and bitumen extract sample correlation with oil sample. The results are then used with well log and biostratigraphy data in the basin model and source rock maturity processing. The characteristic of source rock resulted from the study shows that Talangakar Formation is indeed a potential source rock with a poor to excellent TOC value (0.27-89%), kerogen types II and III tend to to produce oil and gas, source rock maturity phase which is ranged from immature to late state of maturity with vitrinite reflectance value (0.34-1.3%). In addition, the biomarker analysis results indicate that Talangakar Formation is originated from open marine depositional environment, which is specified by organic material mostly mixture of marine and land materials. Simplification of basin modelling and source rock maturity suggest Talangakar Formation as the source rock has now entered a peak mature phase in the AI-1 Well area since 12.5 Ma at a depth of 1514 m, in the AI-2 Well area since 13.8 Ma at a depth of 1754 m, in the AI-3 Well area since 1.2 Ma at a depth of 2206 m, and in the AI-5 Well area since 12.5 Ma at a depth of 1717 m. The Talangakar Formation in the AI-4 Well area has not been able to act as source rock, currently most of it has not entered the mature phase because it is in the Pliopleistocene uplift area.