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Fluid Phase Behavior for Conventional and Unconventional Oil and Gas Reservoirs by Alireza Bahadori

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3.3. Splitting Methods

A lot of hydrocarbon and nonhydrocarbon components such as N2, CO2, and H2S comprise reservoir fluid. Laboratory fluid properties reports usually describe the components as heavier than hexane as a pseudo component by molecular weight and specific gravity. This pseudo component is called the heptane plus fraction. In general, there are two techniques to the characterization of the plus fraction: the pseudocomponent approach and the continuous approach. The pseudocomponent approach refers to an approach in which the plus fraction splits into a number of pseudocomponents with a known mole fraction, molecular weight, specific gravity, and boiling point (Ahmed, 1989; Benmekki and Mansoori, 1989; Riazi, 1989, 1997).

Table 3.8 ...

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