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All Journal TEKNIK Journal of Geoscience, Engineering, Environment, and Technology
Yoga Aribowo
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Earth & Planetary Sciences Engineering Environmental Science Physics

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Review: Geological Structure impacts to hydrocarbon potential and active faults in the East Java Basin, Indonesia Fahrudin; Yoga Aribowo
Journal of Geoscience, Engineering, Environment, and Technology Vol. 9 No. 3 (2024): JGEET Vol 09 No 03 : September (2024)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2024.9.3.16736

Abstract

Review of the geological structure patterns in the East Java Basin (EJB) to understand the geodynamics has implicated to the hydrocarbon potential and active faults. However, the impact of those structures on hydrocarbon potential and active faults is unclear. This study reviewed structure patterns using surface and subsurface data, GPS, seismicity and tremors in the East Java Basin, Indonesia and Nankai Trough, Japan. In EJB, Indonesia, the tectonic setting is constrained by the Rembang Fault. The north of the Rembang Fault, the pattern exhibits NE-SW structures, while to the south, it shows W-E structures. The results indicate that the upper crust (including ophiolitic basement) has greater density to the north than to the south. Thus, vertical motion of the crust is more dominant than lateral motion to the north of the Rembang Fault. This vertical motion may trigger the reactivation of the Meratus Fault (weak zone or as active fault) located on the northern platform (e.g., the Bawean earthquake on March 22, 2023). Conversely, to the south of the Rembang Fault, there is a significant hydrocarbon potential associated with W-E structures. Those structures could form by subduction and collision tectonic. Similary, tectonic backstop may account for presence of structures in Nankai Trough, Japan.
STUDI GEOKIMIA AIR PANAS AREA PROSPEK PANASBUMI GUNUNG KENDALISODO KABUPATEN SEMARANG, PROVINSI JAWA TENGAH Yoga Aribowo; Heri Nurohman
TEKNIK Vol 33, No 1 (2012)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1965.444 KB) | DOI: 10.14710/teknik.v33i1.3793

Abstract

Fluid geochemistry is a useful method to analyse lateral and vertical processes and trends in a geothermalsystem, just like a blood and urine analysis to determine the functions of internal organs in human body. Fluidsgeochemistry study in Kendalisodo Geothermal Prospect has conducted to get information about type andcharacteristics of fluids, to predict reservoir temperature, and sub surface hidrogeochemical cycle model.From fluids geochemistry analysis, the most significant constituent is HCO3, and thus all fluids classified intobicarbonate water. Based on gethermometry analysis, the average reservoir temperature calculated is about175oC and classified into medium enthalpy system.
PREDIKSI TEMPERATUR RESERVOAR PANASBUMI DENGAN MENGGUNAKAN METODA GEOTERMOMETER KIMIA FLUIDA Yoga Aribowo
TEKNIK Vol 32, No 3 (2011)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (191.63 KB) | DOI: 10.14710/teknik.v32i3.1743

Abstract

In the preliminary study of Geothermal field development, one the most important thing to observe istemperature capacity of the geothermal reservoirs. One of several method to get subsurface temperature datathat low cost and reliable is geothermometry method. With just surface investigation of the geothermal prospectand fluid geochemistry analysis, it is possible to make a prediction how hot reservoir fluids are. The subsurfacetemperature prediction is based on physical and chemical properties of some chemical constituent. Temperaturedependant solubility of many chemical consituent of geothermal fluids such as silica, chloride, and Na.
Co-Authors fahrudin Heri Nurohman