Risks of empirical correlations for pseudo-critical properties of natural gas
DOI:
https://doi.org/10.31471/2311-1399-2022-2(18)-27-35Keywords:
acentric factor, compressibility factor, material balance, Monte Carlo method.Abstract
There are given estimates of the influence of uncertainties when using empirical correlations for pseudocritical
characteristics of natural gas with its density on the results of estimates of gas reserves and bottomhole pressures.
Modeling on the examples of the calculation of the blowout pressure in a gas well and the creation of a material balance of
a gas deposit showed that their influence on the overall modeling error can be comparable to the contribution of instrumental
errors only with high-precision measurements of pressure and temperature. When determining the gas supercompressibility
coefficient based on the pseudocritical gas characteristics, about 70 % of the errors will be associated with the variation in the
calculation of the pseudocritical temperature.
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