Hybrid Uses of High-Temperature Reservoir Thermal Energy Storage: Lessons Learned from Previous Projects

P. F. Dobson, T. A. Atkinson, W. Jin, M. Acharya, Dayo Akindipe, B. Li, T. McLing, R. Kumar

Research output: Contribution to conferencePaperpeer-review

1 Scopus Citations

Abstract

One of the critical challenges of the green energy transition is resolving the mismatch between energy generation provided by intermittent renewable energy sources such as solar and wind and the demand for energy. There is a need for large amounts of energy storage over a range of time scales (diurnal to seasonal) to better balance energy supply and demand. Subsurface geologic reservoirs provide the potential for storage of hot water that can be retrieved when needed and used for power generation or direct-use applications, such as district heating. It is important to identify potential issues associated with high-temperature reservoir thermal energy storage (HT-RTES) systems so that they can be mitigated, thus reducing the risks of these systems. This paper reviews past experiences from moderate and high-temperature reservoir thermal energy storage (RTES) projects, along with hot water and steam flood enhanced oil recovery (EOR) operations, to identify technical challenges encountered and evaluate possible ways to address them. Some of the identified technical problems that have impacted system performance include: 1) insufficient site characterization that failed to identify reservoir heterogeneity; 2) scaling resulting from precipitation of minerals having retrograde solubility that form with heating of formation brines; 3) corrosion from low pH or high salinity brines; 4) thermal breakthrough between hot and cold wells due to insufficient spacing. Proper design, characterization, construction, and operational practices can help reduce the risk of technical problems that could lead to reduced performance of these thermal energy storage systems.

Original languageAmerican English
DOIs
StatePublished - 2023
Event2023 SPE Energy Transition Symposium, ETS 2023 - Houston, United States
Duration: 22 Aug 202323 Aug 2023

Conference

Conference2023 SPE Energy Transition Symposium, ETS 2023
Country/TerritoryUnited States
CityHouston
Period22/08/2323/08/23

Bibliographical note

Publisher Copyright:
Copyright 2023, Society of Petroleum Engineers.

NREL Publication Number

  • NREL/CP-5700-87816

Other Report Number

  • Paper No. SPE-215750-MS

Keywords

  • energy storage
  • enhanced oil recovery
  • high-temperature reservoir thermal energy storage
  • reservoir thermal energy storage
  • subsurface geologic reservoirs
  • thermal energy storage systems

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