GAB: Chemical reservoir management

The hydrochemistry of deep aquifers is important for technical safety and economic efficiency. Scalings and corrosion are widespread. On the other hand, the hydrochemical characteristics of deep aquifers offer an integrated view on the flow paths and their development during operation.

In this project, which is part of the Geothermal-Alliance Bavaria, subproject "long-term. Ensuring sustainable thermal water production" the physical and hydrochemical measured values of characteristic plants are processed and examined for multivariate changes in order to discriminate and quantify natural and technically induced gradients. The necessary parameters for hydrogeochemical monitoring are to be generated synthetically via a calibrated hydrogeochemical model with higher temporal resolution. In addition, short-term sampling will be carried out to collect closely resolved hydrochemical data at the boreholes. All collected data are analysed with multivariate statistical methods to define virtual sensors that are able to describe the condition in the reservoir, even during different operating phases, and to replace costly physical sensors in the reservoir that are technically difficult or impossible to implement. The virtual monitoring incorporates data from the accompanying reservoir simulation and, if necessary, takes into account the results from the analogue study. For a holistic prognosis of the development of the reservoir and for successful reservoir management, the processes in the reservoir are mapped in a hydraulically, thermally, mechanically and chemically coupled model based on the results from the hydraulic-thermal model, the geomechanical model and a fully coupled model. In addition, for the determination of the reactive surface area, the quantification of the solution kinetics under reservoir conditions and the potential for hydrogeochemically induced mechanical changes are carried out in collaboration with WP 3. on core material. Using the acquired physical and virtual sensors and the THMC models, an adapted parameter set for quasi-continuous monitoring will be developed, which should contribute to the optimisation of production safety and sustainable management. In the "long-term" sub-project, all the necessary disciplines are thus represented in order to make a significant contribution to improving the forecasting of long-term development. significant contribution to improving the forecast of the long-term development of the reservoir, taking into taking

Contributions to SDG

Partners

Geothermal-Alliance Bavaria

Financial Support

Bayer. Staatsministerium für Wissenschaft und Kunst im Rahmen der Geothermie-Allianz Bayern

Responsible

Annette Dietmaier; Mohamad Omidi; Thomas Baumann;

Project duration:

2021 - 2024

Publications

Papers

T. Winter, F. Schölderle, D. Pfrang, T. Baumann, K. Zosseder, G. Kus & F. Einsiedl (2025): Evaluierung allgemeiner Modellvorstellungen zur großräumigen Fließsystematik im Oberjura-Aquifer (Molassebecken), Grundwasser .

L. Zacherl & T. Baumann (2024): Quantification of scalings in dynamic environments using a combination of quartz crystal microbalance and raman microscopy, Adv. Geosci. 65, doi://10.5194/adgeo-65-9-2024.

L. Zacherl & T. Baumann (2023): Quantification of the effect of gas-water-equilibria on carbonate precipitation, Geothermal Energy 11, doi://10.1186/s40517-023-00256-4.

I. Stüwe, L. Zacherl & C. U. Grosse (2023): Ultrasonic and impact-echo testing for the detection of scaling in geothermal pipelines, J Nondestruct Eval 42, doi://10.1007/s10921-023-00926-0.

A. Dietmaier & T. Baumann (2023): Forecasting changes of the flow regime at deep geothermal wells based on high resolution sensor data and low resolution chemical analyses, Adv. Geosci. 58, doi://10.5194/adgeo-58-189-2023.

A. Dietmaier & T. Baumann (2023): Assessing sustainable development of deep aquifers, Water Resources Management doi://10.1007/s11269-023-03529-6.

C. Wieland, H. Spliethoff & T. Baumann (2020): CO\_2-neutral carrier-gas utilization for deep geothermal applications, Geothermics 88, doi://10.1016/j.geothermics.2020.101895.

M. Ueckert, C. Wismeth & T. Baumann (2020): Crystallization of calcium carbonate in a large scale push-pull heat storage test in a jurassic carbonate aquifer, Geotherm. Energy 8, doi://10.1186/s40517-020-0160-5.

B. Köhl, J. Grundy & T. Baumann (2020): Rippled scales in a geothermal facility - a key to understanding the scaling process, Geotherm. Energy 8, doi://10.1186/s40517-020-00177-6.

B. Köhl, M. Elsner & T. Baumann (2020): Hydrochemical and operational parameters driving carbonate scale kinetics at geothermal facilities in the Bavarian Molasse Basin, Geotherm. Energy 8, doi://10.1186/s40517-020-00180-x.

T. Baumann (2020): Hydrogeochemical restrictions for flexible hydrogeothermal power generation, In: , Proc. World geothermal congress, , , (2020).

S. Eyerer, C. Schifflechner, S. Hofbauer, C Wieland, K. Zosseder, W. Bauer, T. Baumann, F. Heberle, C. Hackl, M. Irl & H. Spliethoff (2017): Potential der hydrothermalen Geothermie zur Stromerzeugung in Deutschland, Potential der hydrothermalen Geothermie zur Stromerzeugung in Deutschland .

Posters

M. Omidi & T. Baumann, Coupling OpenFOAM and PhreeqC to quantify local disruptions of hydrochemical equilibria due to bubble formation and stripping of CO2, EGU 2024, 14.-19.4.2024, Vienna.

A. Dietmaier & T. Baumann, Hydrochemical indicators for sustainable and optimized geothermal use of deep groundwater, EGU 2024, 14.-19.4.2024, Vienna.

L. Zacherl & T. Baumann, Quantifizierung der Calciumkarbonatausfällungskinetik unter dynamischen Bedingungen, Wasser 2023, 15.-17.5.2023, Augsburg.

M. Omidi & T. Baumann, Numerical analysis of scaling formation in geothermal systems: Application in bubble columns, EGU 2023, 23.-28.4.2023, Vienna.

J. Bartels, P. Schätzl & T. Baumann, Hydrochemical stimulation in fractured carbonate rocks - monitoring and simulation, EGU 2023, 23.-28.4.2023, Vienna.

M. Ueckert, C. Wismeth & T. Baumann, Kristallisation der polymorphen Formen des Calciumcarbonats während eines Wärmespeicherversuchs in den carbonatischen Sedimenten des oberen Jura, Der Geothermiekongress 19.-21.11.2019, München.

Talks

L. Zacherl & T. Baumann, Pore scale assessment of disrupted hydrochemical equilibria in geothermal systems, EGU 2024, 14.-19.4.2024, Vienna.

M. Hegels, F. Schölderle & T. Baumann, Hydrochemische Fingerabdrücke als Basis für ein optimiertes Reservoirmanagement, Der Geothermiekongress 2024, 22.-24.10.2024, Potsdam.

M. Hegels & T. Baumann, Depletion of a mineral water aquifer – implications on sustainable groundwater management, EGU 2024, 14.-19.4.2024, Vienna.

L. Zacherl & T. Baumann, Quantification of calcium carbonate precipitation kinetics under dynamic conditions, Anakon 2023, 11.-14.4.2023, Vienna.

A. Dietmaier & T. Baumann, Local effects of the injection of undersaturated waters in geothermal applications, EGU 2023, 23.-28.4.2023, Vienna.

L. Zacherl, M. Omidi & T. Baumann, Scalings in geothermal systems: Quantifying and modeling the role of degassing, European Geothermal Congress 2022, 17.-22.10.2022, Berlin.

L. Zacherl & T. Baumann, Gas phase induced carbonate precipitation - experimental proof and model verification, EGU 2022, 23.-27.5.2022, Vienna.

A. Dietmaier & T. Baumann, Multiple sensor data fusion applied to geothermal reservoir management, European Geothermal Congress 2022, 17.-22.10.2022, Berlin.

A. Dietmaier & T. Baumann, Forecasting high resolution variations in deep geothermal wells based on low resolution measurements utilizing virtual sensors, EGU 2022, 23.-27.5.2022, Vienna.

T. Baumann, Assessment of the hydrochemical integrity of deep geothermal aquifers - lessons from bottled water producers, EGU 2022, 23.-27.5.2022, Vienna.

L. Zacherl & T. Baumann, Gasblaseninduziertes Scaling in Geothermieanlagen, Der Geothermiekongress, 30.11.-1.12.2021, Essen (online).

L. Zacherl & T. Baumann, Gas bubble induced scalings in geothermal systems, vEGU 2021, 19.-30.4.2021, online.

B. Tilley, M. Ueckert & T. Baumann, Porosity dynamics through carbonate-reaction kinetics in high-temperature aquifer storage applications, InterPore 2021 online, 31.5.-4.6.2021.

F. Kaplar & T. Baumann, Comparative study of chemical stimulation at geothermal wells in the carbonates of the upper jurassic in the bavarian molasse basin, vEGU 2021, 19.-30.4.2021, online.

A. Dietmaier & T. Baumann, Long term variations of the hydrochemical composition of deep thermal ground water in the lower bavarian molasse basin - causes and perspectives, vEGU 2021, 19.-30.4.2021, online.

A. Dietmaier & T. Baumann, Langfristige Schwankungen in der hydrochemischen Zusammensetzung des tiefen geothermalen Grundwassers im Bayerischen Molassebecken - Gründe und Perspektiven, Der Geothermiekongress, 30.11.-1.12.2021, Essen (online).

T. Baumann, C. Wieland, R. Staudacher, S. J. Baumann & G. Pasquazzo, Gasmonitoring: Erhöhung der Betriebssicherheit und energetischer Nutzen, GAB Wissenstransfer 25.3.2021 (online).