Proceedings Title : Proc. Indon. Petrol. Assoc., 49th Ann. Conv., 2025
Sequence stratigraphy analysis is a method used to determine the hydrocarbon petroleum system potential of a basin. This includes the reservoir system that is enabled by hydrocarbon migration in relation to the ongoing tectonic processes. One such presence of oil and gas is the Airbenakat Formation, which is a formation where hydrocarbons accumulated during the early regression phase in the Jambi Sub-basin of the South Sumatra Basin. Thus, this formation is an interesting subject for discussion and further research.
The purpose of this specific sequence stratigraphy analysis is to explain the depositional processes related to filling the available accommodation space via abundant sediment supply. This provides information about the depositional system and its role as basin-fill material, as well as the hydrocarbon potential of the Airbenakat Claystone Unit in the Sungai Rotan area, Tanjung Jabung Barat. The research method involves geological mapping surveys, specifically surface geological mapping through field observations. Based on field conditions and previous studies, the Airbenakat Formation, particularly in the Sungai Rotan area, has significant potential as a reservoir due to its association with sandstone that has high permeability, making it effective as a hydrocarbon reservoir.
The pertinent geological formations in the Sungai Rotan area consist of the Gumai Sandstone Unit, the Airbenakat Claystone Unit, and the Airbenakat Sandstone Unit. The morphology is comprised of structural landform units and alluvial plains with a sub-dendritic river flow pattern. The Airbenakat Claystone is characterized by sedimentary structures commonly found as a result of shelf edge transition zone erosion processes. The sequence stratigraphy framework of the study area was deposited in a transitional environment, specifically within the delta front sub-environment of a mouth bar facies.
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