Compositional analysis of oil samples at high pressure

A new, simple method of analyzing light elude oil up to C-24, Sampled at hi gh temperatures and pressures, has been developed. The method avoids time-c onsuming depressurizing procedures. The method utilizes a liquid sampling v alve, which endures moderate heating at relatively high pressures. The glob al composition and number-average molecular weight of the sample is determi ned with sufficient accuracy. Combined with a PVT software package, the gas /oil ratio and the composition of the gas phase by degassing at 15 degrees C and 1 bar can be predicted.