Improved Efficiency of Miscible CO{sub 2} Floods and Enhanced Prospects for CO{sub 2} Flooding Heterogeneous Reservoirs

Technical Report · Fri Oct 31 04:00:00 EST 1997

DOI:https://doi.org/10.2172/1608· OSTI ID:1608

Guo, Boyun ^[1]; Schechter, David S; Tsau, Jyun-Syung; Grigg, Reid B; Chang, Shih-Hsien ^[2]

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1. Gordon
2. Eric

This work will examine three major areas in which CO{sub 2} flooding can be improved: fluid and matrix interactions, conformance control/sweep efficiency, and reservoir simulation for improved oil recovery. The first full quarter of this project has been completed. We began examining synergistic affects of mixed surfactant versus single surfactant systems to enhance the properties of foams used for improving oil recovery in CO{sub 2} floods. The purpose is to reduce the concentration of surfactants or finding less expensive surfactants. Also, we are examining the effect of oil saturation on the development of foam in CO{sub 2}-surfactant solution systems. CO{sub 2} flooding of low permeability, vugular, and fracture reservoirs are another major thrust of this project. Work conducted this quarter involved simulating gravity stable floods using large core samples; results showed excellent recovery in a low permeability vugular core.

• Research Organization: Federal Energy Technology Center, Morgantown, WV (US); Federal Energy Technology Center, Pittsburgh, PA (US)
• Sponsoring Organization: US Department of Energy (US)
• OSTI ID: 1608
• Report Number(s): DE--FG26-97BC15747--02
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
CARBON DIOXIDE INJECTION
ENHANCED RECOVERY
FOAMS
FRACTURED RESERVOIRS
OIL SATURATION
OIL WELLS
PERMEABILITY
PETROLEUM
SURFACTANTS
SWEEP EFFICIENCY