Abstract
Properties of crude oil and natural gas are fundamental for designing and analyzing oil and gas production systems in petroleum engineering. This chapter presents definitions and properties of crude oil and natural gas. Oil properties include solution gas–oil ratio (GOR), density, formation volume factor, viscosity, and compressibility. The latter four properties are interrelated through solution GOR. Gas properties include gas-specific gravity, gas pseudo-critical pressure and temperature, gas viscosity, gas compressibility factor, gas density, gas formation volume factor, and gas compressibility. The first two are composition dependent. The latter four are pressure dependent. A few empirical correlations for determining the value of these properties are provided in the chapter.
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