Geothermal exploration in Indonesia based on Mineralogy and Hydrothermal Alteration

Fiorenza Deon, C. Lievens, Auke Barnhoorn, Chiel Welink, Tulus Imaro, Riskiray Ryannugroho, Ehsan Reyhanitash, David Bruhn, F.D. van der Meer, Rizki UTAMI, Betseba Sibarani, C.A. Hecker, Oona Appelt, Franziska Wilke, Yunus Daud, Tia Den Hartog - Muharamiah

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Abstract

Indonesia with its large, but partially unexplored geothermal potential is one of the most interesting and suitable places in the world to conduct geothermal exploration research. This study focuses on geothermal exploration based on fluid-rock geochemistry/geomechanics and aims to compile an overview on geochemical data-rock properties from important geothermal fields in Indonesia. The research carried out in the field and in the laboratory is performed in the framework of the GEOCAP cooperation (Geothermal Capacity Building program Indonesia- the Netherlands). The application of petrology and geochemistry accounts to a better understanding of areas where operating power plants exist but also helps in the initial exploration stage of green areas. Because of their relevance and geological setting geothermal fields in Java (Wayang Windu, Tanguban Perahu) have been visited so far. Mount Salak, Gunung Slamet (Java) and Flores surveys are planned in the near future. Operators, universities and governmental agencies will benefit from this approach as it will be applied also to new green-field terrains. By comparing the characteristics of the fluids, the alteration petrology and the rock geochemistry we also aim to compile an overview of the geochemistry of several geothermal fields in Indonesia. The gathering of this information is the base for the geomechanical experiments on-going at TUD. At the same time the rock petrology and fluid geochemistry will be used as input data to model the reservoir fluid composition along with TP parameters with the geochemical workbench PHREEQC. The field and laboratory data are mandatory for both the implementation and validation of the model results. If successful, this approach can be applied in many geothermal fields characterized by steep terrain and tropical vegetation, which hampers the classical seismic-geophysical exploration methods.
Original languageEnglish
Title of host publicationIOP Conf. Series: Earth and Environmental Science
Subtitle of host publication7th ITB International Geothermal Workshop (IIGW2018)
PublisherIOP Publishing Ltd.
Pages1-10
Number of pages10
Volume254
Edition1
DOIs
Publication statusPublished - 1 Jan 2019
Event7th ITB International Geothermal Workshop IIGW 2018
- Bandung, Indonesia
Duration: 21 Mar 201822 Mar 2018
Conference number: 7

Workshop

Workshop7th ITB International Geothermal Workshop IIGW 2018
Abbreviated titleIIGW 2018
CountryIndonesia
CityBandung
Period21/03/1822/03/18

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    Deon, F., Lievens, C., Barnhoorn, A., Welink, C., Imaro, T., Ryannugroho, R., ... Den Hartog - Muharamiah, T. (2019). Geothermal exploration in Indonesia based on Mineralogy and Hydrothermal Alteration. In IOP Conf. Series: Earth and Environmental Science: 7th ITB International Geothermal Workshop (IIGW2018) (1 ed., Vol. 254, pp. 1-10). IOP Publishing Ltd.. https://doi.org/10.1088/1755-1315/254/1/012002