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Pore†scale investigation of effects of heterogeneity on CO2 geological storage using stratified sand packs

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  • Pengfei Lv
  • Yu Liu
  • Junlin Chen
  • Lanlan Jiang
  • Bohao Wu
  • Shuyang Liu
  • Yongchen Song

Abstract

The geological sequestration of CO2 is considered to have great potential. However, the heterogeneity that characterizes most geological reservoirs significantly affects the migration, trapping, and leakage of CO2. The present study involved a pore†scale investigation of the effects of heterogeneity in pore size and wettability using stratified sand packs. A stratified glass bead (BZ06+BZ02) pack and a quartz+dolomite pack were introduced in flow experiments at gaseous CO2 (gCO2) and supercritical CO2 (scCO2) conditions. Different injection rates, namely, 0.1, 0.3, and 0.6 mL/min, were applied to the drainage while a constant rate of 0.1 mL/min was maintained for the imbibition. High resolution CT imaging and subsequent processing of the images were used to analyze the effects of heterogeneity in pore size and wettability. The results indicate that heterogeneity in pore size and wettability alters the intrinsic percolation abilities of the individual layers of the stratified structure and weaken the linear correlation between CO2 volume and slice†averaged porosity. It was also observed that water films sometimes exist in the layers with smaller pore spaces after drainage and it can trigger snap off events. © 2017 Society of Chemical Industry and John Wiley & Sons, Ltd.

Suggested Citation

  • Pengfei Lv & Yu Liu & Junlin Chen & Lanlan Jiang & Bohao Wu & Shuyang Liu & Yongchen Song, 2017. "Pore†scale investigation of effects of heterogeneity on CO2 geological storage using stratified sand packs," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 7(6), pages 972-987, December.
    • Handle: RePEc:wly:greenh:v:7:y:2017:i:6:p:972-987
    DOI: 10.1002/ghg.1702
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    References listed on IDEAS

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    1. Pengfei Lv & Yu Liu & Lanlan Jiang & Yongchen Song & Bohao Wu & Jiafei Zhao & Yi Zhang, 2016. "Experimental determination of wettability and heterogeneity effect on CO 2 distribution in porous media," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 6(3), pages 401-415, June.
    2. Ning Wei & Magdalena Gill & Dustin Crandall & Dustin McIntyre & Yan Wang & Kathy Bruner & Xiaochun Li & Grant Bromhal, 2014. "CO 2 flooding properties of Liujiagou sandstone: influence of sub‐core scale structure heterogeneity," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 4(3), pages 400-418, June.
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    Cited by:

    1. Widuramina Amarasinghe & Ingebret Fjelde & Nils Giske & Ying Guo, 2021. "CO 2 Convective Dissolution in Oil-Saturated Unconsolidated Porous Media at Reservoir Conditions," Energies, MDPI, vol. 14(1), pages 1-13, January.

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