Effect of interfacial tension on displacement efficiency
Conference
·
OSTI ID:6523103
Immiscible displacement tests were performed in a consolidated sandstone core over the interfacial tension range from less than 0.01 dynes/cm to 5 dynes/cm to better define how interfacial tension (IFT) reduction can lead to increased oil recovery. The data obtained were displacement efficiency at breakthrough vs. IFT for both drainage and imbibition conditions. These tests simulate waterflooding under oil-wet conditions and water-wet conditions, respectively. The results of the study have shown that displacement efficiency under both oil-wet and water-wet conditions can be markedly improved by a sufficient reduction in IFT. In the particular porous media used and for the low pressure gradients employed, the IFT must be reduced to a value less than about 0.07 dynes/cm to achieve increased recovery at the time of breakthrough of the injected phase. Below 0.07 dynes/cm further small reductions in IFT result in large increases in displacement efficiency.
- OSTI ID:
- 6523103
- Country of Publication:
- United States
- Language:
- English
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