Buletin Sumber Daya Geologi
Vol 20 No 3 (2025): Buletin Sumber Daya Geologi

DELINEASI AREA PROSPEK DAN KARAKTERISASI RESERVOIR PANAS BUMI NON-VULKANIK UNTUK PEMANFAATAN LANGSUNG DI BANDA BARU, MALUKU TENGAH: PROSPECT AREA DELINEATION AND CHARACTERIZATION OF NON-VOLCANIC GEOTHERMAL RESERVOIRS FOR DIRECT USE IN BANDA BARU, CENTRAL MALUKU

Melisano, Erawan (Unknown)
Nugraha, Husin Setia (Unknown)
Rahadinata, Tonny (Unknown)
Sumintadireja, Prihadi (Unknown)



Article Info

Publish Date
30 Nov 2025

Abstract

The significant disparity between Indonesia's geothermal direct-use potential (230 MWt) and its current utilization (8 MWt) necessitates precise delineation methods for non-volcanic systems. This study aims to characterize the shallow reservoir and delineate the prospect area in Banda Baru, Central Maluku, using integrated geoscience data. A GIS-based Multi-Influencing Factor (MIF) method was applied to map groundwater potential, which was then synthesized with surface CO2 gas anomalies and Magnetotelluric (MT) resistivity gradient modeling. The results identified a 6.49 km2 prospect area controlled by fracture structures within metamorphic rocks. Validation through the BBR-1 temperature gradient well drilling showed significant success, encountering 95°C fluid at a depth of 164 meters. This finding prompted a re-evaluation of geophysical interpretations, proving that low resistivity values (<50 ohm-m) represent active thermal aquifers rather than conventional clay caps. Based on production tests, the total measured resource potential in this region is estimated at 6.3 MWt. This integrated modeling provides a strategic instrument for efficient non-volcanic geothermal development to support the local economy through sustainable direct-use schemes.

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Journal Info

Abbrev

bsdg

Publisher

Subject

Education Energy Engineering Environmental Science

Description

uletin Sumber Daya Geologi merupakan Makalah berkala ilmiah terakreditasi LIPI bidang mineral, energi fosil, dan panas bumi. Makalah ini terbit tiga nomor dalam satu tahun pada bulan Mei, Agustus dan November. Pada Tahun 2010, Buletin Sumber Daya Geologi mendapat Akreditasi B sebagai majalah ...