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Validation of multicomponent geothermometer with sensitivity analysis in basaltic geothermal setting

Ystroem, Lars Helge; Nitschke, Fabian; Held, Sebastian; Kohl, Thomas

Abstract (englisch):
Reservoir temperature estimation is a key technique in successful geothermal reservoir exploration. Since often the errors in reservoir temperature estimations are high, statistical approaches are used. The focus on this study lies in the application of multicomponent geothermometry to estimate the reservoir temperature in Krafla and Námafjall geothermal fields, Iceland.
In quantitative geothermometry the mineral saturation and element ratios of the geothermal fluid are used to obtain the reservoir temperature based on the geochemical equilibrium between mineral phases and the reservoir rock. Thereby, the saturation state of different minerals serves as a geothermometer and hence the coupling of several geothermometers allows for statistically robust estimates. Within this study the reservoir temperatures of the geothermal system are determined by in-situ measurements. The objective is to define a typical mineral set for basaltic reservoir rocks by calibration with the measured data.
Krafla and Námafjall are high-enthalpy geothermal reservoirs located in the neo-volcanic zone of Northeast Iceland. Magma heated geothermal brines are expected to reach 350°C at a depth of 2000 m. ... mehr

Volltext §
DOI: 10.5445/IR/1000100779
Veröffentlicht am 11.12.2019
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Geowissenschaften (AGW)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Poster
Publikationsdatum 10.10.2018
Sprache Englisch
Identifikator KITopen-ID: 1000100779
HGF-Programm 35.14.01 (POF III, LK 01) Effiziente Nutzung geothermisch. Energie
Veranstaltung 6th European Geothermal Workshop (EGW 2018), Straßburg, Frankreich, 10.10.2018 – 11.10.2018
Schlagwörter multicomponent geothermometry, sensitivity analysis, reservoir temperature estimation
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