CHARACTERISTIC STUDY OF KILIRAN THERMAL OIL SHALE, CENTRAL SUMATRA SUB-BASIN, TO SUPPORT PROCESSING PROSPECT

• Main Author: Ilham Rafii Ramadhan, Muhammad
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/54476
• Institution: Institut Teknologi Bandung

Oil shale is a group of fine clastic sedimentary rocks containing organic material (kerogen) which can produce a fluid similar to oil when extracted. Shale oil is similar to petroleum, and can be refined into many different substances, including diesel fuel, gasoline, and liquefied petroleum gas (LPG). The thermal properties of oil shale can be assessed using thermogravimetric analysis (TGA) and rock eval analysis. This research only focused on the thermal characteristics of oil shale during the pyrolysis process. Five samples of oil shale from the Kiliran Jao area of Central Sumatra were studied to determine thermal behavior with a pyrolysis approach using thermogravimetric analysis (TGA) and rock eval. This thermal behavior can illustrate what oil shale experiences during the stockpiling process in nature, artificial processes, etc. In addition, the characteristics of Kiliran flakes can also be known through the analysis of the TOC content in them. Characteristically, Kiliran shale belongs to type I / II and tends to produce oil. However, the level of ripeness of Kiliran flakes is not yet ripe (referring to the Ro and Tmax parameters). The results of TGA show that the Kiliran shale undergoes three stages, namely preheating, pyrolysis with the loss of hydrocarbons where in this phase the greatest mass loss occurs and as a target for retorting (production) of oil shale, as well as further pyrolysis of organic matter and mineral decomposition. The TGA results also showed that the decrease in the mass of the five samples was different. This is due to the composition of the oil shale such as interlayer water content, surface water, organic matter composition and carbonate content.