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

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7.6. Gas Properties

7.6.1. Viscosity

Fluid flow through gas reservoirs depends on the viscosity of natural gas mixtures, which plays a noteworthy role in analytical calculations for gas production and numerical simulations for long-term predictions. Same as oil reservoirs, the lab studies and measurements are time-consuming, expensive, and have more limitations compared with analytical and empirical correlations. The laboratory limitations for oil/gas property measurements including recombining the fluid sample, simulating reservoir condition in the lab, and preserving equilibrium circumstances. Consequently, upstream experts are very interested in using empirical correlations (Chen and Ruth, 1993; Naseri et al., 2014) for calculating the reservoir ...

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