Directional Hydraulic Characteristics of Reservoir Rocks for CO 2 Geological Storage in the Pohang Basin, Southeast Korea

Junhyung Choi, Kyungbook Lee, Young Jae Shinn, Seil Ki and Dae Sung Lee
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Junhyung Choi: Petroleum and Marine Resources Division, Korea Institute of Geoscience and Mineral Resources, Daejeon 34132, Korea
Kyungbook Lee: Department of Geoenvironmental Sciences, Kongju National University, Gongju-si 32588, Korea
Young Jae Shinn: Department of Ocean Science, Korea Marine & Ocean University, Busan 49118, Korea
Seil Ki: E&P Technology Center, Korea National Oil Corporation, Ulsan 44538, Korea
Dae Sung Lee: Department of Energy and Mineral Resources Engineering, Dong-A University, Busan 49315, Korea

Energies, 2021, vol. 14, issue 8, 1-15

Abstract: This study conducted core sampling of an offshore borehole for geological reservoir characterization of a potential CO 2 storage site in southeast Korea. From this, two promising geological formations at ~739 and ~779 m were identified as prospective CO 2 storage reservoirs. Injection efficiency and CO 2 migration were evaluated based on directional measurements of permeabilities from core plugs. The directional transport properties were determined using both a portable probe permeameter and a pressure cell capable of applying different in situ confining pressures. Both steady state and unsteady state measurements were used to determine permeability—the method selected according to the expected permeability range of the specific sample. This expected range was based on rapid screening measurements acquired using a portable probe permeameter (PPP). Anticipated performance of the prototypical CO 2 injection site was evaluated based on flow modeling of the CO 2 plume migration pathway including CO 2 transport through the overlying formations based on the measured directional hydraulic properties. These analyses revealed that the injection efficiency at a depth of 739 m was double that at 779 m. These correlations among and distributions of the directional permeabilities of the potential CO 2 geological storage site can be utilized for the assessment of CO 2 storage capacity, injectivity, and leakage risk.

Keywords: carbon capture and storage (CCS); CO 2 geological storage; permeability; directional permeability (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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