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Article

The Potential of Depleted Oil Reservoirs for High-Temperature Storage Systems

1
Institute of Applied Geosciences, Karlsruhe Institute of Technology, Adenauerring 20b, 76131 Karlsruhe, Germany
2
Institute of Nuclear Waste Disposal, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
*
Author to whom correspondence should be addressed.
Energies 2020, 13(24), 6510; https://doi.org/10.3390/en13246510
Received: 18 November 2020 / Revised: 2 December 2020 / Accepted: 5 December 2020 / Published: 9 December 2020
(This article belongs to the Special Issue Heat Storage in the Deep Underground)
HT-ATES (high-temperature aquifer thermal energy storage) systems are a future option to shift large amounts of high-temperature excess heat from summer to winter using the deep underground. Among others, water-bearing reservoirs in former hydrocarbon formations show favorable storage conditions for HT-ATES locations. This study characterizes these reservoirs in the Upper Rhine Graben (URG) and quantifies their heat storage potential numerically. Assuming a doublet system with seasonal injection and production cycles, injection at 140 °C in a typical 70 °C reservoir leads to an annual storage capacity of up to 12 GWh and significant recovery efficiencies increasing up to 82% after ten years of operation. Our numerical modeling-based sensitivity analysis of operational conditions identifies the specific underground conditions as well as drilling configuration (horizontal/vertical) as the most influencing parameters. With about 90% of the investigated reservoirs in the URG transferable into HT-ATES, our analyses reveal a large storage potential of these well-explored oil fields. In summary, it points to a total storage capacity in depleted oil reservoirs of approximately 10 TWh a−1, which is a considerable portion of the thermal energy needs in this area. View Full-Text
Keywords: HT-ATES; seasonal energy storage; depleted oil reservoirs; upper rhine graben; numerical modeling; potential analysis HT-ATES; seasonal energy storage; depleted oil reservoirs; upper rhine graben; numerical modeling; potential analysis
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MDPI and ACS Style

Stricker, K.; Grimmer, J.C.; Egert, R.; Bremer, J.; Korzani, M.G.; Schill, E.; Kohl, T. The Potential of Depleted Oil Reservoirs for High-Temperature Storage Systems. Energies 2020, 13, 6510. https://doi.org/10.3390/en13246510

AMA Style

Stricker K, Grimmer JC, Egert R, Bremer J, Korzani MG, Schill E, Kohl T. The Potential of Depleted Oil Reservoirs for High-Temperature Storage Systems. Energies. 2020; 13(24):6510. https://doi.org/10.3390/en13246510

Chicago/Turabian Style

Stricker, Kai, Jens C. Grimmer, Robert Egert, Judith Bremer, Maziar Gholami Korzani, Eva Schill, and Thomas Kohl. 2020. "The Potential of Depleted Oil Reservoirs for High-Temperature Storage Systems" Energies 13, no. 24: 6510. https://doi.org/10.3390/en13246510

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