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Modeling of CO2-LPG WAG with asphaltene deposition to predict coupled enhanced oil recovery and storage performance
- Title
- Modeling of CO2-LPG WAG with asphaltene deposition to predict coupled enhanced oil recovery and storage performance
- Authors
- Cho J.; Min B.; Jeong M.S.; Lee Y.W.; Lee K.S.
- Ewha Authors
- 민배현; 조진형
- SCOPUS Author ID
- 민배현; 조진형
- Issue Date
- 2021
- Journal Title
- Scientific Reports
- ISSN
- 2045-2322
- Citation
- Scientific Reports vol. 11, no. 1
- Publisher
- Nature Research
- Indexed
- SCIE; SCOPUS
- Document Type
- Article
- Abstract
- Combined carbon capture and storage and CO2-enhanced oil recovery (CCS-EOR) can reconcile the demands of business with the need to mitigate the effects of climate change. To improve the performance of CCS-EOR, liquefied petroleum gas (LPG) can be co-injected with CO2, leading to a reduction in the minimum miscibility pressure. However, gas injection can cause asphaltene problems, which undermines EOR and CCS performances simultaneously. Here, we systematically examine the mechanisms of asphaltene deposition using compositional simulations during CO2-LPG–comprehensive water–alternating-gas (WAG) injection. The LPG accelerates asphaltene deposition, reducing gas mobility, and increases the performance of residual trapping by 9.2% compared with CO2 WAG. In contrast, solubility trapping performance declines by only 3.7% because of the greater reservoir pressure caused by the increased formation damage. Adding LPG enhances oil recovery by 11% and improves total CCS performance by 9.1% compared with CO2 WAG. Based on reservoir simulations performed with different LPG concentrations and WAG ratios, we confirmed that the performance improvement of CCS-EOR associated with increasing LPG and water injection reaches a plateau. An economic evaluation based on the price of LPG should be carried out to ensure practical success. © 2021, The Author(s).
- DOI
- 10.1038/s41598-021-81316-2
- Appears in Collections:
- 공과대학 > 기후에너지시스템공학과 > Journal papers
- Files in This Item:
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s41598-021-81316-2.pdf(3.56 MB)
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