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Compositional modeling to analyze the effect of CH4 on coupled carbon storage and enhanced oil recovery process

Title
Compositional modeling to analyze the effect of CH4 on coupled carbon storage and enhanced oil recovery process
Authors
Cho J.Park G.Kwon S.Lee K.S.Lee H.S.Min B.
Ewha Authors
민배현
Issue Date
2020
Journal Title
Applied Sciences (Switzerland)
ISSN
2076-3417JCR Link
Citation
Applied Sciences (Switzerland) vol. 10, no. 12
Keywords
Carbon capture and storage associated with enhanced oil recovery (CCS-EOR)CH4Global warming potential (GWP)Water alternating gas (WAG)
Publisher
MDPI AG
Indexed
SCIE; SCOPUS scopus
Document Type
Article
Abstract
The present study is aimed at the development of compositional simulation models of the co-injection of CO2 and CH4 during the water-alternating-gas (WAG) process in order to assess the efficiency of carbon capture and storage in combination with enhanced oil recovery (CCS-EOR). The co-injection of CO2 and CH4 occupies more reservoir pore volume and causes higher reservoir pressure than CO2 WAG, thus leading to an enhanced early EOR performance. However, the overall EOR performance of the co-injection method becomes lower than that of CO2 WAG due to the reduced miscibility and sweep efficiency upon further CH4 addition. The decrease in gas displacement and sweep efficiency weaken the hysteresis effects upon the residual trapping mechanism. However, the solubility trapping mechanism takes effect because the co-injection generates higher average reservoir pressure than does the CO2 WAG. The index of global warming potential (GWP) in a mole unit is employed to quantify the carbon storage effects of CO2 and co-injectionWAG cases. According to the index, 1 mole of CH4 sequestration has the same effects as that of 10 moles of CO2 for global warming mitigation. In conclusion, the carbon storage effects are enhanced as CH4 concentration in the WAG increases. © 2020 by the authors.
DOI
10.3390/app10124272
Appears in Collections:
엘텍공과대학 > 기후·에너지시스템공학전공 > Journal papers
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