The behavior of condensate fluids in the presence of water and carbon dioxide is of considerable interest because of the effect these compounds can have on some of the reservoir fluid properties.

This paper describes a series of experimental measurements on a typical condensate reservoir fluid and gives compressibility factors above the retrograde dew point to a pressure of over 49 MPa at 177.8°C for both the dry and water-saturated fluid. It also gives vapor-liquid and vapor-liquid-liquid phase compositions at 10.34 and 20.68 MPa and temperatures of 37.8° and 93.3°C respectively. Condensation curves are presented for the water-free fluid at 177.8°C and for the water-saturated fluid at 37.8°, 93.3°C and 177.8°C.

Experimental results are also presented for the initial carbon dioxide crystallization temperature for the condensate separator gas after flashing at −28.9°C and 7.38 MPa.

The experimental and calculated results are compared using a cubic equation of state.

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