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Title: Compressibility Of Natural Gas
Author: Jeffrey L. Savidge
Source: 2003 International School of Hydrocarbon Measurement
Year Published: 2003
Abstract: The accurate measurement of natural gas and natural gas related fluids is difficult. It requires care, insight, and experience to achieve consistently accurate measurements. It is particularly difficult to measure complex fluid mixtures that are exposed to: (1) a range of operating conditions, (2) dynamic fluid properties, and (3) changing equipment conditions. Conservation equations for energy and mass flow provide the engineering foundation for flow measurement. They establish the theoretical flow rate. Correlations are used to complete the application of the conservation equations and improve the accuracy of the measurement to meet practical measurement requirements. Correlations bind the conservation equations to measured equilibrium and dynamic experimental data, e.g. PVT data and flow rate data. They provide necessary information on the thermodynamic and fluid flow condition. Measurement technologies that are concerned with measuring the volume or mass of product must use or determine the density.

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