Review of Surfactant Enhanced Oil Recovery in Carbonate Reservoirs
Обзор повышения нефтеотдачи карбонатных коллекторов с применением поверхностно-активных веществ
2013-09-26
SCID: 54.1/ne38k9ep
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carbonate reservoirschemical EORsurfactant enhanced oil recoveryupscaling modelswettability alteration
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Abstract (AI)
About half of proven conventional oil reserves are in carbonate reservoirs. Due to complex structures, formation heterogeneities and oil-wet/mixed wet conditions, etc., the oil recovery factor in carbonate reservoirs is very low. There is increasing interest in improve oil recovery using surfactants, as the surfactant EOR has the potential after other EOR methods have been tried. This paper reviews the models of wettability alteration using surfactants and upscaling models related to oil recovery in carbonate reservoirs. Chemicals used in carbonate reservoirs are reviewed. The field cases where surfactants were used to stimulate oil recovery are analyzed. Key words: Enhanced oil recovery; Carbonate reservoirs; Wettability alteration; Chemical EOR
Key Findings
1
Carbonate reservoirs contain about half of proven conventional oil reserves, yet their recovery factors are low because of complex structures, heterogeneity, and oil-wet or mixed-wet conditions.
2
Surfactant-enhanced oil recovery is identified as a promising option after other enhanced-oil-recovery methods have been attempted.
3
The paper reviews chemicals used for surfactant EOR in carbonate reservoirs and analyzes field cases where surfactants stimulated oil recovery.
4
The review examines models describing surfactant-induced wettability alteration and upscaling models linking these effects to oil recovery in carbonate reservoirs.
Research Object
carbonate reservoirs
Research Subject
surfactant-enhanced oil recovery, including wettability alteration, upscaling models, chemical selection, and field performance
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2013-09-26
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