Analysis of CO2 and brine relative permeability of in-situ core samples with employing double separator

The relative permeability of CO 2 and brine has a significant impact on CO 2 saturation, migration, and injectivity for CO 2 geological storage. This study presents a new experimental apparatus consisting of a double separator that can reduce uncertainties in measuring fluid saturation. It was appli...

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Published inGeosciences journal (Seoul, Korea) Vol. 25; no. 3; pp. 363 - 371
Main Authors Jeong, Gu Sun, Choi, Junhyung, Lee, Dae Sung, Ki, Seil
Format Journal Article
LanguageEnglish
Published Seoul The Geological Society of Korea 01.06.2021
Springer Nature B.V
한국지질과학협의회
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Summary:The relative permeability of CO 2 and brine has a significant impact on CO 2 saturation, migration, and injectivity for CO 2 geological storage. This study presents a new experimental apparatus consisting of a double separator that can reduce uncertainties in measuring fluid saturation. It was applied to measure relative permeabilities of in-situ cores samples of Berea, Gorae, and Paaratte sandstone. The wettability criteria and Brook-Corey model were applied to explain the characteristics in relative permeability of CO 2 and brine. The result for Berea sandstone using the developed apparatus was consistent with results obtained in literatures, and they indicate high residual brine saturation and low end-point relative permeability of CO 2 . The results for Gorae sandstone show that the residual brine saturation is higher and the shape of the relative permeability curves are more concave compared to those of Paaratte sandstone; these results relate to the water-wetting tendency and dominant capillary flow, respectively. It means that injection of CO 2 into Gorae sandstone is expected to be less efficient than into Paaratte sandstone. Therefore, it is reasonable to estimate that less amount of CO 2 should be injected into Gorae sandstone compared to Paaratte sandstone.
Bibliography:https://doi.org/10.1007/s12303-020-0027-6
ISSN:1226-4806
1598-7477
DOI:10.1007/s12303-020-0027-6