CO2-plume geothermal (CPG) heat extraction in multi-layered geologic reservoirs

Nagasree Garapati, Jimmy B. Randolph, José L. Valencia, Martin O. Saar

Research output: Chapter in Book/Report/Conference proceedingConference contribution

12 Scopus citations

Abstract

CO2-Plume Geothermal (CPG) technology involves injecting CO22into natural, highly permeable geologic units to extract energy. The subsurface CO2 absorbs heat from the reservoir, buoyantly rises to the surface, and drives a power generation system. The CO2 is then cooled and reinjected underground. Here, we analyze the effects of multi-layered geologic reservoirs on CPG system performance by examining the CO2 mass fraction in the produced fluid, pore-fluid pressure buildup during operation, and heat energy extraction rates. The produced CO2 mass fraction depends on the stratigraphic positions of highly permeable layers which also affect the pore-fluid pressure drop across the reservoir.

Original languageEnglish (US)
Title of host publicationEnergy Procedia
PublisherElsevier Ltd
Pages7631-7643
Number of pages13
Volume63
DOIs
StatePublished - 2014
Event12th International Conference on Greenhouse Gas Control Technologies, GHGT 2014 - Austin, United States
Duration: Oct 5 2014Oct 9 2014

Other

Other12th International Conference on Greenhouse Gas Control Technologies, GHGT 2014
Country/TerritoryUnited States
CityAustin
Period10/5/1410/9/14

Keywords

  • Brine displacement
  • Carbon capture and sequestration (CCS)
  • Carbon capture utilization and sequestration (CCUS)
  • Carbon dioxide
  • Geothermal system
  • Heterogeneity
  • Reservoir simulations

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