The Relationship of Organic Components to Source Rocks Types Based on Biomarker Data at Central Sumatra Basin

Abstract

A biomarker study is used to observe the quality level of a hydrocarbon compound deposited on the source rock. The presence of Botryococcus braunii algae, Pediastrum algae, and other lacustrine algae is thought to be a contributing factor to petroleum in lacustrine basins throughout Southeast Asia. Botryococcus braunii is a group of green algae and belongs to the Trebouxiophyceae class. The purpose of this study is to discuss the relationship between organic compounds and the type of source rock in the Central Sumatra Basin. The Central Sumatra Basin is a back-arc basin that develops along the edge of the Sunda shelf in Southeast Asia. This basin was formed by the moving of the submergence of the Indian Ocean plate relative to the North and infiltrates the Asian Continent plate. The data used in this study is taken from several literatures/references in biomarker analysis where qualitative analysis was carried out, such as: matching the readings of compounds contained in the chromatogram and associate them with classification in some existing literatures where the selection of organic components that had an effect on geological analysis was carried out. An explanation of some of the data obtained along with the chromatogram and geological analysis and interpretation can be seen in this paper. Some conclusions can be drawn from this research in the form of qualitative analysis of organic components to define the maturity of the hydrocarbon and suspect the source organic materials of the hydrocarbon in source rocks. The explanation of the main biomarkers that must be considered when analyzing oil or source rock samples is to know the characteristic of the hydrocarbon and correlate it with reaction during the deposition.