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Simplified physics model of CO 2 plume extent in stratified aquifer‐caprock systems

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  • Priya Ravi Ganesh
  • Srikanta Mishra

Abstract

The extent of plume migration as injected CO 2 displaces the native reservoir fluids is a crucial performance metric to ensure safe and effective geologic sequestration. In this paper, we develop and validate a simplified physics model for the outer extent of CO 2 ‐brine interface in a stratified aquifer‐caprock system. This involves quantifying the total storage efficiency, which is defined as the product of the volumetric sweep and displacement efficiencies, based on simulations covering an extensive parameter space of different reservoir and caprock properties. We model CO 2 injection into a 2‐D radially symmetric brine‐filled reservoir with vertical permeability variations that is in hydraulic communication with a caprock. Based on insights from a suite of detailed numerical simulations of our system, the most important terms in the simplified model for total storage efficiency involve the relative permeability model followed by integrated measures of reservoir heterogeneity. A relationship is established for the plume extent at the end of injection from the amount of CO 2 injected and the storativity (porosity‐thickness product) of the reservoir. © 2015 Society of Chemical Industry and John Wiley & Sons, Ltd

Suggested Citation

  • Priya Ravi Ganesh & Srikanta Mishra, 2016. "Simplified physics model of CO 2 plume extent in stratified aquifer‐caprock systems," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 6(1), pages 70-82, February.
    • Handle: RePEc:wly:greenh:v:6:y:2016:i:1:p:70-82
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    File URL: http://hdl.handle.net/10.1002/ghg.1537
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    Cited by:

    1. Vo Thanh, Hung & Yasin, Qamar & Al-Mudhafar, Watheq J. & Lee, Kang-Kun, 2022. "Knowledge-based machine learning techniques for accurate prediction of CO2 storage performance in underground saline aquifers," Applied Energy, Elsevier, vol. 314(C).
    2. Mohamed Mehana & Seyyed A. Hosseini & Timothy A. Meckel & Hari Viswanathan, 2020. "Modeling CO2 plume migration using an invasion‐percolation approach that includes dissolution," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 10(2), pages 283-295, April.

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