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

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

doi:10.1016/j.egypro.2014.11.797

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

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

Earth and Environmental Sciences-Twin Cities

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

32 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 language	English (US)
Title of host publication	Energy Procedia
Publisher	Elsevier Ltd
Pages	7631-7643
Number of pages	13
Volume	63
DOIs	https://doi.org/10.1016/j.egypro.2014.11.797
State	Published - 2014
Event	12th International Conference on Greenhouse Gas Control Technologies, GHGT 2014 - Austin, United States Duration: Oct 5 2014 → Oct 9 2014

Other

Other	12th International Conference on Greenhouse Gas Control Technologies, GHGT 2014
Country/Territory	United States
City	Austin
Period	10/5/14 → 10/9/14

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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This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.egypro.2014.11.797

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Cite this

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title = "CO2-plume geothermal (CPG) heat extraction in multi-layered geologic reservoirs",

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.",

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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AU - Garapati, Nagasree

AU - Randolph, Jimmy B.

AU - Valencia, José L.

AU - Saar, Martin O.

PY - 2014

Y1 - 2014

N2 - 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.

AB - 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.

KW - Brine displacement

KW - Carbon capture and sequestration (CCS)

KW - Carbon capture utilization and sequestration (CCUS)

KW - Carbon dioxide

KW - Geothermal system

KW - Heterogeneity

KW - Reservoir simulations

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