constant composition expansion | Energy Glossary

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constant composition expansion

1. n. [Enhanced Oil Recovery]

A laboratory test usually performed as part of a routine PVT analysis that measures the change in volume of a reservoir fluid as a function of pressure. This change is determined by measuring the total volume of a sample of reservoir fluid at various pressures above and below the saturation pressure. The pressure-dependent volumes are normalized to the volume of the sample at the saturation pressure.

See related terms: PVT