Kohl, Thomas

Nitschke, Fabian

Ystroem, Lars H.

English

KITopen

KIT – The Research University in the Helmholtz Association www.kit.eduAn Integrated Sensitivity Analysis for Multicomponent Geothermometer for High Temperature SettingsLars Ystroem, Fabian Nitschke, Sebastian Held, Thomas Kohllars.ystroem@kit.eduLars Ystroem et al. – An Integrated Sensitivity Analysis for Multicomponent GeothermometerInstitute of Applied Geosciences (AGW)Geothermal Energy and Reservoir-TechnologyUsing multiple mineral phases as geothermometerPlotting the saturation curves of  minerals against temperatureTemperature estimation is given when mineral phase is in equilibrium(SI = 0; intersecting dashed line)𝑆𝐼 𝑇 =𝐼𝐴𝑃𝐾(𝑇)SI = saturation index, T = temperature, IAP = ion activity product, K = thermodynamic equilibrium constant17.05.20212Multicomponent geothermometryLars Ystroem et al. – An Integrated Sensitivity Analysis for Multicomponent GeothermometerInstitute of Applied Geosciences (AGW)Geothermal Energy and Reservoir-TechnologyFluid is vulnerable to secondary processes while ascending to the surface, disturbing the equilibria of mineral phases:BoilingPhase segregationMixingDilutionPrecipitationPerforming sensitivity analyses to reconstruct reservoir conditions17.05.20213UncertaintiesLars Ystroem et al. – An Integrated Sensitivity Analysis for Multicomponent GeothermometerInstitute of Applied Geosciences (AGW)Geothermal Energy and Reservoir-Technology17.05.20214Lars Ystroem et al. – An Integrated Sensitivity Analysis for Multicomponent GeothermometerInstitute of Applied Geosciences (AGW)Geothermal Energy and Reservoir-TechnologypH value:Uncertainties due to CO2 and H2S buffering, temperature dependence, steam loss and boiling, measuring errors (field / laboratory)Aluminium concentration:Uncertainties due to pH changes, forming and precipitation of aluminium complexes, fluid sampling (filter), measurement close to detection limit  Steam loss / dilution:Uncertainties due to element concentration errors17.05.20215Sensitive parametersLars Ystroem et al. – An Integrated Sensitivity Analysis for Multicomponent GeothermometerInstitute of Applied Geosciences (AGW)Geothermal Energy and Reservoir-TechnologyGlobal minimum: Al concentration 0.079 mmol/kg, pH 7.95 ,and 14 % steam loss17.05.20216Interdependent optimisation processLars Ystroem et al. – An Integrated Sensitivity Analysis for Multicomponent GeothermometerInstitute of Applied Geosciences (AGW)Geothermal Energy and Reservoir-Technology17.05.20217Result given by MulT_predict

An Integrated Sensitivity Analysis for Multicomponent Geothermometer for High Temperature Settings

https://publikationen.bibliothek.kit.edu/1000132787/114036542

An Integrated Sensitivity Analysis for Multicomponent Geothermometer for High Temperature Settings

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