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 ...