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

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3.2. Experimental Methods

Experimental methods are the most reliable way of characterizing the plus fraction (Whitson and Brulé, 2000). True boiling point (TBP) distillation and chromatography are the most commonly used procedures. Experimental data obtained from TBP distillation are the most accurate way to characterize the plus fraction, particularly when the specific gravity of each cut is calculated (Riazi, 2005). TBP analysis gives the most important data, such as the boiling point, specific gravity, and molecular weight for each cut. TBP distillation is costly and takes about 48 h.
Simulated distillation by gas chromatography (GC), presented in the American Society for Testing and Materials (ASTM) 2887, is a simple method of characterization ...

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