ABSTRACT
To optimize the production from an oil or a gas field, it is essential to have extensive knowledge of the volumetric and phase changes the reservoir fluid is likely to undergo on its way from petroleum reservoir to oil refinery. Reservoir pressures typically range from 100 to 1500 bar, and reservoir temperatures from 50 to 200
°
C. The well connecting the reservoir to the topside facilities can have a length of more than 2 km. The pressure and temperature will gradually decrease in production well. It will further decrease in flowlines connecting the well to the process plant and in the process plant itself. Figure 3.1 illustrates schematically the production path of a reservoir fluid.
