Evaluation of Correlations of Compressibility Factor (z) of Natural Gas for Algerian Gas Reservoirs

The study of PVT properties of natural gas is essential for the development of its production and exploitation. The laboratory is considered the main source of data for these properties as it is also possible to compute these data using state equations and empirical correlations with variable error margins. This work aims to study experimentally an Algerian natural gas, concentrating on the calculation of the compressibility factor, using the relative correlations to calculate this factor, while trying to modify these with what corresponds better with Algerian natural gas based on statistical tools and experimental data. The results of this study show that it is possible to develop and update the correlation coefficients that correspond better with each geographic region in order to reduce the margin of error. (C) 2019 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/)