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CO 2 solubility measurements in brine under reservoir conditions: A comparison of experimental and geochemical modeling methods

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  • Luc Steel
  • Qi Liu
  • Eric Mackay
  • M. Mercedes Maroto‐Valer

Abstract

The dissolution of CO 2 in brine (solubility trapping) is one of the most secure and permanent trapping mechanisms when considering CO 2 geological storage. In addition, CO 2 dissolution in brine is an important mechanism of CO 2 enhanced oil recovery as it improves sweep efficiency and increases oil displacement. Currently, there is a range of experimental methods that has been used to measure CO 2 solubility in brine and a critical review of these methods is presented here. Several different geochemical models that can be used to calculate CO 2 solubility in brine are also reviewed and the importance of selecting the correct equation of state (EoS) is addressed. Furthermore, the validity of the experimental results was ascertained through a comparison of the published experimental results with those produced through geochemical modeling. The geochemical modeling software, HydraFLASH, can be used to accurately calculate CO 2 solubilities under a number of conditions provided the correct EoS is selected. For the purpose of CO 2 ‐water systems, the Valderrama‐Patel‐Teja EoS is the most accurate as it is designed to be used for systems containing polar and non‐polar compounds. The published experimental results were compared with those obtained through the geochemical modeling, to ascertain the most accurate means of measuring CO 2 solubility. © 2016 Society of Chemical Industry and John Wiley & Sons, Ltd

Suggested Citation

  • Luc Steel & Qi Liu & Eric Mackay & M. Mercedes Maroto‐Valer, 2016. "CO 2 solubility measurements in brine under reservoir conditions: A comparison of experimental and geochemical modeling methods," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 6(2), pages 197-217, April.
    • Handle: RePEc:wly:greenh:v:6:y:2016:i:2:p:197-217
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    File URL: http://hdl.handle.net/10.1002/ghg.1590
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    Cited by:

    1. Ji Ho Lee & Tae Hong Kim & Kun Sang Lee, 2018. "Hybrid CO2 EOR using polymer‐assisted carbonated low salinity waterflood to improve CO2 deliverability and mobility," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 8(3), pages 444-461, June.

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