Analysis of factors affecting microscopic displacement efficiency in CO2 floods

Baljit S. Sehbi, Scott M Frailey, Akanni S. Lawal

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The displacement efficiency of a CO2 flood has two components: microscopic and macroscopic displacement efficiency. This work focuses on the factors that affect microscopic displacement efficiency. The factors are pressure, temperature, oil composition, CO2 purity, fluid properties, and reservoir pore configurations. These factors contribute to the phase behavior of a particular CO2 flood. Mixing as a result of diffusion improves microscopic displacement efficiency as compared to mixing by dispersion, which decreases microscopic displacement efficiency. Phase behavior governs the development and sustenance of CO2 miscibility with crude oil at reservoir conditions. Lower injection rates and higher residence time increases mass transfer between the oil and CO2. Improved transfer leads to oil swelling and viscosity and surface tension reduction that improve microscopic displacement efficiency. Uniform pore geometry and favorable pore structure causes higher microscopic displacement efficiency. The presence of dead-end pores decreases the displacement process. The volume and distribution of water within the pore affects the contact area between CO2 and the crude oil and can impede the miscibility process. As possible, this work quantifies the affect some of the factors have on microscopic displacement efficiency and suggests means of improving the displacement process.

Original languageEnglish (US)
Title of host publicationSociety of Petroleum Engineers - SPE Permian Basin Oil and Gas Recovery Conference 2001, OGR 2001
PublisherSociety of Petroleum Engineers
ISBN (Print)9781555639280
StatePublished - Jan 1 2001
Externally publishedYes
EventSPE Permian Basin Oil and Gas Recovery Conference 2001, OGR 2001 - Midland, United States
Duration: May 15 2001May 17 2001

Publication series

NameSociety of Petroleum Engineers - SPE Permian Basin Oil and Gas Recovery Conference 2001, OGR 2001

Other

OtherSPE Permian Basin Oil and Gas Recovery Conference 2001, OGR 2001
CountryUnited States
CityMidland
Period5/15/015/17/01

Fingerprint

Phase behavior
Solubility
Crude oil
crude oil
oil
Petroleum reservoirs
analysis
Pore structure
Surface tension
Swelling
surface tension
Mass transfer
swelling
Viscosity
mass transfer
residence time
viscosity
Fluids
Geometry
geometry

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Geotechnical Engineering and Engineering Geology

Cite this

Sehbi, B. S., Frailey, S. M., & Lawal, A. S. (2001). Analysis of factors affecting microscopic displacement efficiency in CO2 floods. In Society of Petroleum Engineers - SPE Permian Basin Oil and Gas Recovery Conference 2001, OGR 2001 (Society of Petroleum Engineers - SPE Permian Basin Oil and Gas Recovery Conference 2001, OGR 2001). Society of Petroleum Engineers.

Analysis of factors affecting microscopic displacement efficiency in CO2 floods. / Sehbi, Baljit S.; Frailey, Scott M; Lawal, Akanni S.

Society of Petroleum Engineers - SPE Permian Basin Oil and Gas Recovery Conference 2001, OGR 2001. Society of Petroleum Engineers, 2001. (Society of Petroleum Engineers - SPE Permian Basin Oil and Gas Recovery Conference 2001, OGR 2001).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Sehbi, BS, Frailey, SM & Lawal, AS 2001, Analysis of factors affecting microscopic displacement efficiency in CO2 floods. in Society of Petroleum Engineers - SPE Permian Basin Oil and Gas Recovery Conference 2001, OGR 2001. Society of Petroleum Engineers - SPE Permian Basin Oil and Gas Recovery Conference 2001, OGR 2001, Society of Petroleum Engineers, SPE Permian Basin Oil and Gas Recovery Conference 2001, OGR 2001, Midland, United States, 5/15/01.
Sehbi BS, Frailey SM, Lawal AS. Analysis of factors affecting microscopic displacement efficiency in CO2 floods. In Society of Petroleum Engineers - SPE Permian Basin Oil and Gas Recovery Conference 2001, OGR 2001. Society of Petroleum Engineers. 2001. (Society of Petroleum Engineers - SPE Permian Basin Oil and Gas Recovery Conference 2001, OGR 2001).
Sehbi, Baljit S. ; Frailey, Scott M ; Lawal, Akanni S. / Analysis of factors affecting microscopic displacement efficiency in CO2 floods. Society of Petroleum Engineers - SPE Permian Basin Oil and Gas Recovery Conference 2001, OGR 2001. Society of Petroleum Engineers, 2001. (Society of Petroleum Engineers - SPE Permian Basin Oil and Gas Recovery Conference 2001, OGR 2001).
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