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Geopressured Potential In Indonesia Sedimentary Basin: Lesson Learned From Gulf of Mexico Geopressured System
The tectonic setting of Indonesia initiated the presence of various natural resources including geothermal energy. Geothermal systems in Indonesia are commonly distributed along with volcanic arcs associated with Quaternary andesitic-stratovolcano. Most of the systems typically are high relief systems with high reservoir temperatures. Consequently, this kind of this system is utilized as a power plant in this country. The complexity of the geological setting also affected the existence of uncommon geothermal systems in Indonesia, such as geopressured system. The geopressured system was one of the non-volcanic geothermal systems situated in a sedimentary basin consisting of hot water and dissolved natural gas, formed in a low porosity shale rock that was buried on several depths kilometers by the rock formation. Through the characteristics of geopressured in Gulf of Mexico, this paper aims to identify the similarities between Indonesian sedimentary basin that influenced by overpressure mechanism such as North Sumatera Basin and Kutai Basin. At the end, this study will provide the information of initial recognition the geopressured system existence in Indonesia and strategies to explore and utilization. The result shows that there are similarities of characteristic between Gulf of Mexico with North Sumatera Basin and Kutai Basin for overpressure mechanism, host rock, trap system, and trend of thermal gradient. It shows that there is potential of geopressured system in Indonesia sedimentary basin.