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Effects of Anisotropy and CO[sub.2] Wettability on CO[sub.2] Storage Capacity in Sandstone

Geofluids, 2022-07, Vol.2022 [Peer Reviewed Journal]

COPYRIGHT 2022 Hindawi Limited ;ISSN: 1468-8115 ;EISSN: 1468-8123 ;DOI: 10.1155/2022/5900255

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  • Title:
    Effects of Anisotropy and CO[sub.2] Wettability on CO[sub.2] Storage Capacity in Sandstone
  • Author: Song, Jun Young ; Jeong, Yeon Jong ; Yun, Tae Sup
  • Subjects: Anisotropy
  • Is Part Of: Geofluids, 2022-07, Vol.2022
  • Description: The geological sequestration of carbon dioxide (CO[sub.2]) is an alternative strategy for mitigating global warming. The CO[sub.2] storage capacity is often characterized by the capillary pressure curve, which in turn depends on the pressure and temperature of the injected CO[sub.2] and the internal structure of the reservoir rocks. The key structural feature that influences the storage capacity in porous rocks is their inherent anisotropy. An experimental study was performed to investigate the optimal conditions for CO[sub.2] injection into an anisotropic sandstone. The capillary pressure curve and the residual CO[sub.2] saturation were determined by injecting three CO[sub.2] phases into the directionally cored sandstone specimens with different flow rates. The CO[sub.2] saturation in sandstone increased with increasing flow rate, resulting in asymptotic values. The storage capacity of CO[sub.2] was the highest in the order of liquid CO[sub.2] (LCO[sub.2]), supercritical CO[sub.2] (scCO[sub.2]), and gaseous CO[sub.2] (gCO[sub.2]). It was also the highest when the direction of CO[sub.2] injection was normal in relation to the embedded sandstone layers. The in situ cored sandstone from the Janggi Basin in Korea was further tested to examine the effect of its pore size on the capillary pressure of CO[sub.2].
  • Publisher: Hindawi Limited
  • Language: English
  • Identifier: ISSN: 1468-8115
    EISSN: 1468-8123
    DOI: 10.1155/2022/5900255
  • Source: ProQuest Central
    DOAJ Directory of Open Access Journals
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