Minardi,, S and zaenudin,, ahmad and Sarkowi,, Muh and Kadir,, W.G.A and SANTOSO,, D. and Raharjo,, I (2019) STUDI DINAMIKA FLUIDA RESERVOIR GEOTERMAL MENGGUNAKAN METODE GAYABERATMIKRO 4D (STUDI KASUS : LAPANGAN PANASBUMI KAMOJANG JAWA BARAT). In: PROCEEDINGS JOINT CONVENTION BALI 2007 The 32nd HAGI, The 36th IAGI, and The 29th IATMI Annual Conference and Exhibition, 13-16 November 2007, BALI.

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Application of microgravity survey by measuring gravity change in time had been used extensively in many fields. The major causes of gravity change are mass change in reservoir (subsurface) and vertical ground movement (subsidence). While the observed gravity change, called as time-lapse microgravity anomaly, is as superposition of all the causes, hence how to identify each source is very important because some of causes could have similar response. As example is increase of subsurface density (mass) and subsidence. In order to minimize this uncertainty, time-lapse vertical gradient microgravity associated with its time-lapse microgravity is analyzed. Theoretical background of this analysis is that vertical gradient microgravity value at the surface will be constant if there is only subsidence (no subsurface mass change). Therefore, response of its time-lapse vertical gradient microgravity for subsidence will be zero. In contrast, subsurface density change is indicated by anomaly values that direct proportional with its subsurface Microgravity and vertical gradient measurement has been conducted at 87 stations which distributed in geothermal field of Kamojang and analyzed to identify subsurface source. Microgravity inversion was also figure subsurface density anomaly as representation of reservoir dynamic. Result of the research is map of density change that relates with fluid movement in the reservoir. In order to support interpretation result, 3D inversion is also applied.

Item Type: Conference or Workshop Item (Paper)
Subjects: Q Science > QC Physics
Q Science > QE Geology
Divisions: Fakultas Teknik (FT) > Prodi Teknik Geofisika
Date Deposited: 02 May 2019 04:17
Last Modified: 02 May 2019 04:17
URI: http://repository.lppm.unila.ac.id/id/eprint/11141

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