Paleoenvironmental Study of Miocene Sediments from JTB-1 and NRM-1 wells, in West Ogan Komering Block, Meraksa Area, South Sumatra Basin

2nd Transdisciplinary Research on Environmental Problems in Southeast Asia

地球科学;生态环境科学

Aswan^1 ; Abdurrachman, Mirzam^1 ; Sapta Fitriana, Bayu^2 ; Fery Mustofa, Mohamad^2 ; Dwijo Santoso, Wahyu^1 ; Rudyawan, Alfend^1 ; Rahayu, Windy Dwi.^1 ; Hamdani, Ahmad^1 ; Rohiman, Yepi^1 ; Zin Oo, Thaw^3

Geology Department, Faculty of Earth Sciences and Technology, Institute of Technology Bandung, Jalan Ganesa 10, Bandung

40132, Indonesia^1

JOB Pertamina-Talisman (Ogan Komering) Limited, Gedung Setiabudi Atrium, Lantai 7, Jalan HR Rasuna Said, Kavling 62, Jakarta

12920, Indonesia^2

Geology Department, East Yangon University, Yangon Division, Thanlyin Township, Myanmar^3

关键词: Airbenakat;    Baturaja;    Miocene;    paleoenvironmental;    South Sumatra Basin;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/71/1/012033/pdf
DOI  :  10.1088/1755-1315/71/1/012033

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Paleodepositional study based on microfossil has been done on Miocene sediments from JTB-1 and NRM-1 wells, West Ogan Komering Block, Meraksa area, South Sumatra Basin. This study was carried out to test the different depositional environment of the well-known stratigraphic units in South Sumatra Basin, which was assumed to occur due to different structural position. In this study, stratigraphic unit classification was determined by their lithology characteristics, they are: Lahat Formation, Talangakar Formation, Baturaja Formation, Gumai Formation, and Airbenakat Formation. This study reveals that the shelf deposits, such as The Baturaja and Gumai Formation of NRM-1 well have thicker interval and indicate marine depositional environment compared to the same rock unit of JTB -1 well. The Baturaja Formation in JTB-1 well was deposited in a shallow neritic environment while at the NRM-1 well, it was deposited on a shallow neritic to middle neritic interval. The Gumai Formation interval at the JTB-1 well was deposited in middle neritic to outer neritic bathymetric zone while at the NRM-1 well; the entire interval indicates outer neritic sediment. Integrated study of microfossils analysis, stratigraphic and seismic correlation shows that the position of JTB-1 well is structurally higher than the NRM-1. It is consistent with the interval sediment in JTB-1 well which are generally thinner and interpreted as shallower marine deposit. The results from this study will give significant contributions for the hydrocarbon exploration and development in terms of improving knowledge of paleodepositional environment. Therefore, distribution, characteristics and hydrocarbon potential could be estimated more accurately as well as optimising the hydrocarbon recovery.