Integrated Geothermal-CO2 Reservoir Systems: Reducing Carbon Intensity through Sustainable Energy Production and Secure CO2 Storage

Buscheck, Thomas A.; Elliot, Thomas; Celia, Michael A.; Chen, Mingjie; Sun, Yunwei; Ye, Hao; Lu, Chuanhe; Wolery, Thomas J.; Aines, Roger D.

doi:10.1016/j.egypro.2013.06.591

Cited by 33 publications

(21 citation statements)

References 8 publications

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“…Given that CO 2 injection can work as a means to enhance geothermal heat extraction (Pruess, 2006;Buscheck et al, 2013), and that R&D projects integrating geothermal energy production and CO 2 storage have recently become one of the priority projects to be implemented by university-industry collaboration, geothermal fields not only provide natural analogues but also emerge as particularly important storage sites deserving further attention. CO 2 -He systematics provide a promising approach both to predict and monitor the evolution of such systems as CO 2 is injected in geothermal reservoirs during operational stages and following abandonment of large-scale industrial projects.…”

Section: Discussionmentioning

confidence: 99%

Turkish geothermal fields as natural analogues of CO 2 storage sites: Gas geochemistry and implications for CO 2 trapping mechanisms

Güleç

Hilton

2016

Geothermics

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Section: Discussionmentioning

confidence: 99%

Turkish geothermal fields as natural analogues of CO 2 storage sites: Gas geochemistry and implications for CO 2 trapping mechanisms

Güleç

Hilton

2016

Geothermics

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“…Buscheck et al . [] and Elliot et al . [] also investigated how production wells could be used for geothermal energy, with a focus on well locations and coupled thermal and CO 2 breakthrough considerations.…”

Section: Practical Models and Their Applicationsmentioning

confidence: 99%

Status of CO₂storage in deep saline aquifers with emphasis on modeling approaches and practical simulations

et al. 2015

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Carbon capture and storage (CCS) is the only viable technology to mitigate carbon emissions while allowing continued large-scale use of fossil fuels. The storage part of CCS involves injection of carbon dioxide, captured from large stationary sources, into deep geological formations. Deep saline aquifers have the largest identified storage potential, with estimated storage capacity sufficient to store emissions from large stationary sources for at least a century. This makes CCS a potentially important bridging technology in the transition to carbon-free energy sources. Injection of CO 2 into deep saline aquifers leads to a multicomponent, multiphase flow system, in which geomechanics, geochemistry, and nonisothermal effects may be important. While the general system can be highly complex and involve many coupled, nonlinear partial differential equations, the underlying physics can sometimes lead to important simplifications. For example, the large density difference between injected CO 2 and brine may lead to relatively fast buoyant segregation, making an assumption of vertical equilibrium reasonable. Such simplifying assumptions lead to a range of simplified governing equations whose solutions have provided significant practical insights into system behavior, including improved estimates of storage capacity, easy-to-compute estimates of CO 2 spatial migration and pressure response, and quantitative estimates of leakage risk. When these modeling studies are coupled with observations from well-characterized injection operations, understanding of the overall system behavior is enhanced significantly. This improved understanding shows that, while economic and policy challenges remain, CO 2 storage in deep saline aquifers appears to be a viable technology and can contribute substantially to climate change solutions.

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“…Operating an EGS typically involves hydraulically, thermally, and/or chemically stimulating naturally low-permeability rock to increase the bulk formation permeability, a process that has a significant likelihood of inducing seismicity (e.g., Evans et al, 2005;Majer et al, 2007;Giardini, 2009). In contrast, CO 2 -Plume Geothermal (CPG) systems (Randolph and Saar, 2011a,b;Saar et al, 2012Saar et al, -2015Buscheck et al, 2013) involve injection of CO 2 that comes from a CO 2 emitter, as a subsurface working fluid to extract heat and pressure energy (enthalpy) from naturally high-permeability sedimentary or stratigraphic basins. Formations in these basins are typically bounded by low-permeability formations such as base rocks and caprocks, although more complex trapping structures may exist.…”

Section: Introductionmentioning

confidence: 94%

Brine displacement by CO2, energy extraction rates, and lifespan of a CO2-limited CO2-Plume Geothermal (CPG) system with a horizontal production well

2015

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a b s t r a c tSeveral studies suggest that CO 2 -based geothermal energy systems may be operated economically when added to ongoing geologic CO 2 sequestration. Alternatively, we demonstrate here that CO 2 -Plume Geothermal (CPG) systems may be operated long-term with a finite amount of CO 2 . We analyze the performance of such CO 2 -limited CPG systems as a function of various geologic and operational parameters. We find that the amount of CO 2 required increases with reservoir depth, permeability, and well spacing and decreases with larger geothermal gradients. Furthermore, the onset of reservoir heat depletion decreases for increasing geothermal gradients and for both particularly shallow and deep reservoirs.

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Integrated Geothermal-CO2 Reservoir Systems: Reducing Carbon Intensity through Sustainable Energy Production and Secure CO2 Storage

Cited by 33 publications

References 8 publications

Turkish geothermal fields as natural analogues of CO 2 storage sites: Gas geochemistry and implications for CO 2 trapping mechanisms

Turkish geothermal fields as natural analogues of CO 2 storage sites: Gas geochemistry and implications for CO 2 trapping mechanisms

Status of CO₂storage in deep saline aquifers with emphasis on modeling approaches and practical simulations

Brine displacement by CO2, energy extraction rates, and lifespan of a CO2-limited CO2-Plume Geothermal (CPG) system with a horizontal production well

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Integrated Geothermal-CO2 Reservoir Systems: Reducing Carbon Intensity through Sustainable Energy Production and Secure CO2 Storage

Cited by 33 publications

References 8 publications

Turkish geothermal fields as natural analogues of CO 2 storage sites: Gas geochemistry and implications for CO 2 trapping mechanisms

Turkish geothermal fields as natural analogues of CO 2 storage sites: Gas geochemistry and implications for CO 2 trapping mechanisms

Status of CO2storage in deep saline aquifers with emphasis on modeling approaches and practical simulations

Brine displacement by CO2, energy extraction rates, and lifespan of a CO2-limited CO2-Plume Geothermal (CPG) system with a horizontal production well

Contact Info

Product

Resources

About

Status of CO₂storage in deep saline aquifers with emphasis on modeling approaches and practical simulations