2026-06-30T20:49:44Zhttp://doidb.wdc-terra.org/oaip/oai

oai:doidb.wdc-terra.org:76862026-06-10T10:18:11ZDOIDBDOIDB.GFZ

false4DOIDB.GFZ 10.5880/GFZ.4.8.2022.009 Hehn, Vera Vera Hehn Hydroisotop GmbH, Schweitenkirchen, Germany Iannotta, Joy Joy Iannotta 0000-0002-1011-2650 Hydroisotop GmbH, Schweitenkirchen, Germany Eichinger, Florian Florian Eichinger Hydroisotop GmbH, Schweitenkirchen, Germany GFZ Data Services 2022 geothermal hydrothermal REFLECT Redefining geothermal fluid properties at extreme conditions to optimize future geothermal energy extraction EARTH SCIENCE > SOLID EARTH > EARTH GASES/LIQUIDS EARTH SCIENCE > SOLID EARTH > GEOCHEMISTRY > GEOCHEMICAL PROPERTIES > CHEMICAL CONCENTRATIONS EARTH SCIENCE > SOLID EARTH > GEOCHEMISTRY > GEOCHEMICAL PROPERTIES > ISOTOPES EARTH SCIENCE > SOLID EARTH > GEOTHERMAL DYNAMICS > GEOTHERMAL ENERGY EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > GROUND WATER > GROUNDWATER CHEMISTRY Hehn, Vera Vera Hehn Hydroisotop GmbH, Schweitenkirchen, Germany Hehn, Vera Vera Hehn Hydroisotop GmbH, Schweitenkirchen, Germany Iannotta, Joy Joy Iannotta 0000-0002-1011-2650 Hydroisotop GmbH, Schweitenkirchen, Germany Eichinger, Florian Florian Eichinger Hydroisotop GmbH, Schweitenkirchen, Germany Hydroisotop GmbH Hydroisotop GmbH, Schweitenkirchen, Germany Hehn, Vera Hydroisotop GmbH, Schweitenkirchen, Germany Kieling, Katrin GFZ German Research Centre for Geosciences, Potsdam, Germany 2020-06-29/2020-06-29 Dataset 10.48440/gfz.4.8.2021.005 https://www.reflect-h2020.eu/ https://cordis.europa.eu/project/id/850626 CC BY 4.0 The main objective of the work package 2 of the REFLECT project is to characterise relevant fluid properties and their reactions for saline fluids (type C). One of the specific goals was to collect fluid samples from several saline fluids from geothermal sites across Europe, determine their properties, and thus contribute to the Fluid Atlas (WP3). Additionally, the REFLECT team will compare those field data with data from lab experiments performed at near natural conditions.

Samples of type C fluids were taken from several sites in Germany, Austria, Belgium and the Netherlands. The samples were analysed for major and minor ions, dissolved gases and isotopes.

At the geothermal site Blumau in Austria five thermal water samples were taken by Hydroisotop at the production and injection well, as well as after the heat exchanger on 29th of June 2020. Besides the hydrochemical composition, dissolved gases, the heavy metal content, DOC and stable isotopes (18O, 2H, 13C-DIC) were analysed. Additionally, three thermal water samples were taken by the operator on 09th of March 2021 and sent to Hydroisotop for DOC measurements.

The dataset contains analysis results associated with the research project reflect. It is a comma separated file (csv) containing the following columns: Location,Country,Description,Laboratory,Lab No.,Sampling date,Temperature at sampling (degC),Spec. electr. conductivity (25 degC) at sampling,Spec. electr. conductivity (25 degC) Lab. (muS/cm),pH value at sampling,pH value Lab.,Temperature Lab. (degC),Dissolved oxygen content (mg/l),Redox potential (mV),Alkalinity (pH 4.3) Lab. (mmol/l),Sodium (mg/l),Potassium (mg/l),Calcium (mg/l),Magnesium (mg/l),Ammonium (mg/l),Hydrogen carbonate (mg/l),Chloride (mg/l),Sulphate (mg/l),Nitrate (mg/l),Nitrite (mg/l),Antimony (mg/l),Barium (mg/l),Boron (mg/l),Bromide (mg/l),Fluoride (mg/l),Iodide (mg/l),Molybdenum (mg/l),Ortho-phosphate (mg/l),Selenium (mg/l),Strontium (mg/l),Sulphide total (mg/l),Aluminium (mg/l),Arsenic (mg/l),Lead (mg/l),Cadmium (mg/l),Chromium total (mg/l),Cobalt (mg/l),Iron total (mg/l),Copper (mg/l),Nickel (mg/l),Mercury (mg/l),Zinc (mg/l),Tin (mg/l),DOC (mg/l),Hydrogen (Nml/kg),Oxygen (Nml/kg),Nitrogen (Nml/kg),Carbon dioxide (Nml/kg),Methane (Nml/kg),Ethane (Nml/kg),Propane (Nml/kg),Butane (Nml/kg),Pentane (Nml/kg),Ethene (Nml/kg),Propene (Nml/kg),Helium (Nml/kg),Argon (Nml/kg),Sum Gases (Nml/kg),Oxygen-18 d18O-H2O (per mille VSMOW),Deuterium d2H-H2O (per mille VSMOW),Deuterium-excess (per mille VSMOW),Carbon-13 d13C-DIC (per mille VPDB)

Methods are described in the accompanying deliverable Fluid data of geothermal sites (type C).
Project summary: The efficiency of geothermal utilisation largely depends on the behaviour of fluids that transfer heat between the geosphere and the engineered components of a power plant. The Horizon 2020 funded project REFLECT aims to avoid problems related to fluid chemistry rather than treat them. Fluid physical and chemical properties are often poorly defined, as in situ sampling and measurements at extreme conditions have proved difficult to date. Therefore, large uncertainties in current model predictions prevail, which are being tackled in REFLECT by collecting new, high-quality data in critical areas. The data is being implemented in a European geothermal fluid atlas and in predictive models to allow recommendations on how to best operate geothermal sites sustainably and to enhance geothermal technology development. This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement nº 850626. Project website: https://www.reflect-h2020.eu/ Cordis website: https://cordis.europa.eu/project/id/850626
Geothermal well Bad Blumau, Austria Horizon 2020 Framework Programme http://doi.org/10.13039/100010661 850626 Reflect