Co-optimizing enhanced oil recovery and CO2 storage by simultaneous water and CO2 injection

Kamali, Fatemeh and Cinar, Yildiray (2014) Co-optimizing enhanced oil recovery and CO2 storage by simultaneous water and CO2 injection. Energy Exploration and Exploitation, 32 2: 281-300. doi:10.1260/0144-5987.32.2.281

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Author Kamali, Fatemeh
Cinar, Yildiray
Title Co-optimizing enhanced oil recovery and CO2 storage by simultaneous water and CO2 injection
Formatted title
Co-optimizing enhanced oil recovery and CO2 storage by simultaneous water and CO2 injection
Journal name Energy Exploration and Exploitation   Check publisher's open access policy
ISSN 0144-5987
2048-4054
Publication date 2014-07-03
Sub-type Article (original research)
DOI 10.1260/0144-5987.32.2.281
Open Access Status File (Publisher version)
Volume 32
Issue 2
Start page 281
End page 300
Total pages 20
Place of publication London, United Kingdom
Publisher Sage Publications
Language eng
Formatted abstract
This paper presents a numerical simulation study to investigate whether simultaneous water and gas (SWAG) injection can co-optimize CO2 storage and enhanced oil recovery. Compositional displacements in a three-dimensional, layered reservoir model are modeled to examine different injection scenarios for maximizing oil recovery and CO2 storage capacity. The effects of various CO2-water ratios and different miscibility conditions on sweep efficiency, incremental oil recovery and CO2 storage capacity are investigated. Compositional changes of oil and gas phases, in the presence of mobile water in immiscible, near miscible or miscible SWAG injection are examined. Simulation results show that SWAG injection can enhance oil recovery compared to waterflooding and continuous CO2 injection by 6 to 21% the original oil in place. The optimum gas fraction in injection fluid increases as miscibility develops. When CO2 is injected simultaneously with water, 30–60% of injected CO2 can be stored with optimum injection ratios depending on the miscibility condition. On the contrary, in continuous gas injection, both oil recovery and CO2 storage capacity increase with miscibility. The simulation results also reveal that, for the reservoir studied, near miscible SWAG injection yields the highest oil recovery and storage efficiency in shortest operating duration.
Keyword Enhanced oil recovery
Gas injection
SWAG
CO2 sequestration
Numerical simulation
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Faculty of Engineering, Architecture and Information Technology Publications
 
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Created: Mon, 03 Apr 2017, 15:06:15 EST by Fatemeh Kamali on behalf of UQ Energy Initiative