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

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.

DETERMINATION OF LANDSLIDE SLIP PLANE USING GEOLOGY AND GEOELECTRICAL ANALYSIS AT MOUNT GEGER PULUS LEGOK EMO SLOPE SEGMENT, CILILIN, WEST JAVA

Mount Geger Pulus in Cililin District, West Java shows a cone geomorphology composed of an Andesitic intrusion in which part of the slope is covered by volcanic rock. Small scale landslides have occurred several times indicating that the surrounding area is at risk of landslides. The slope segment of Legok Emo of this mount has a steep to very steep slope, covered by secondary and mixed forests. Settlement lies around the bottom of this slope. The results of geoelectrical measurements and geological analysis of this slope segment indicate that the slope has a potential to landslide that is controlled by tuff acting as a slip plane and can be triggered by rainfall. The layer that has the potential to landsliding are weathered volcanic breccias with a thickness of about 3 meters with a maximum of 5 meters that is overlying tuff which is relatively impermeable.

Petroleum Geological Analysis Based on Remote Sensing and laser scanning in Karamay Formation of Junggar Basin, China

This paper uses high-precision remote sensing and laser scanning to study petroleum geological analysis methods. The research area is Karamay Formation in Junggar Basin, China. Firstly, the outcrop lithologies are identified according to our clastic rock lithology identification pattern based on laser intensity, and the regional lithologies are identified based on high-precision remote sensing images. Furthermore, we analyze the horizontal and vertical distribution characteristics of the sandbodies. At last, we analyze the area sandbody connectivity and sandbody structure characteristics. These data can provide basic information for the analysis of underground reservoirs in Karamay Formation.