Sarkowi, Muh and Wibowo, Rahmat Catur (2021) Geothermal Reservoir Identification based on Gravity Data Analysis in Rajabasa Area�Lampung. Riset Geologi dan Pertambangan Indonesian Journal of Geology and Mining, 31 (2). pp. 77-97. ISSN 01259849

Preview

Text PaperFull-Sarkowi-Rajabasa1.pdf Download (2MB) | Preview

Abstract

Gravity research in the Rajabasa geothermal prospect area was conducted to determine geothermal reservoirs and faults as reservoir boundaries. The research includes spectrum analysis and separation of the Bouguer anomaly to obtain a residual Bouguer anomaly, gradient analysis using the second vertical derivative (SVD) technique to identify fault structures or lithological contact, and 3D inversion modeling of the residual Bouguer anomaly to obtain a 3D density distribution subsurface model. Analysis was performed based on all results with supplementary data from geology, geochemistry, micro-earthquake (MEQ) epicenter distribution map, and magnetotelluric (MT) inversion profiles. The study found 3 (three) geothermal reservoirs in Mount Balirang, west of Mount Rajabasa, and south of Pangkul Hot Spring, with a depth of around 1,000-1,500 m from the ground level. Fault structures and lithologies separate the three reservoirs. The location of the reservoir in the Balirang mountain area corresponds to the model data from MEQ, temperature, and magnetotelluric resistivity data. The heat source of the geothermal system is under Mount Rajabasa, which is indicated by the presence of high-density values (might be frozen residual magma), high-temperature values, and the high number of micro-earthquakes epicenters below the peak of Mount Rajabasa.

Item Type:	Article
Subjects:	T Technology > T Technology (General)
Divisions:	Fakultas Teknik (FT) > Prodi Teknik Geofisika
Depositing User:	MUHAMMAD S
Date Deposited:	24 Feb 2023 02:43
Last Modified:	24 Feb 2023 02:43
URI:	http://repository.lppm.unila.ac.id/id/eprint/48537

Actions (login required)

View Item