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Title: White Paper - GERG-2008 Equation of State Compressibility Uncertainty Algorithm
Author: Richard Rans
Source: 2019 Canadian School of Hydrocarbon Measurement
Year Published: 2019
Abstract: Improvements in the accuracy of the equations of state have resulted in increased ranges of pressure, temperature and composition where accurate predictions of properties are possible. Unfortunately, the availability of the reference composition with measured properties which cover these expanded conditions continues to be limited. The development of an uncertainty algorithm, based on calculating the equation of state compressibility sensitivity for a small change in composition, allows users to keep pace with the equation of state improvements. It also identifies operating areas where higher component interaction sensitivities result in increased equation of state compressibility uncertainties.

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