alexa Effect of Miscibility Condition for CO2 Flooding on Gra

Journal of Petroleum & Environmental Biotechnology
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Research Article

Effect of Miscibility Condition for CO2 Flooding on Gravity Drainage in 2D Vertical System

Jinju Han, Joohyung Kim, Junwoo Seo, Hyemin Park, Hyeok Seomoon and Wonmo Sung*
Department of Natural Resources and Environmental Engineering, Hanyang University, Seoul, Republic of Korea
Corresponding Author : Sung WM
Department of Natural Resources and Environmental Engineering
Hanyang University, Republic of Korea
E-mail: [email protected]
Received May 24, 2014; Accepted June 28, 2014; Published July 05, 2014
Citation: Han J, Kim J, Seo J, Park H, Seomoon H, et al. (2014) Effect of Miscibility Condition for CO2 Flooding on Gravity Drainage in 2D Vertical System. J Pet Environ Biotechnol 5:177. doi:10.4172/2157-7463.1000177
Copyright: © 2014 Han J, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


In CO2 flooding process, gravity drainage and miscibility condition are the main factors on the efficiency of oil recovery. In this study, we observed oil recovery for different miscibility conditions in vertical oil reservoir. This was investigated in two dimensional vertical sandstone slab, where unstable gravity drainage phenomena can be formed. CO2 is injected at bottom into 100% saturated with oil and production port is open at top of the system. We have performed a series of experiments using continuous CO2 flooding for immiscible and near-miscible conditions. From the experimental results, oil recovery at near-miscible condition is 3.77 times greater than at immiscible condition, particularly in vertical system. It indicated that applying the immiscible CO2 flooding is ineffective because of gravity override of CO2 and generation of CO2 channel at upper side in vertical reservoir. Meanwhile, the results revealed that oil recovery increases considerably once miscibility is reached at outlet. That is, miscibility condition is found to be a sensitive factor on oil recovery particularly in vertical oil reservoir.


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