Optimization of calculation method for natural gas deviation coefficient of tight sandstone gas reservoir in Ordos Basin

Abstract

The deviation coefficient of natural gas is an important parameter in the evaluation of gas reservoir geological reserves and the analysis of pipeline gathering and transportation capacity. For S blocks the status quo, no natural gas high pressure physical properties test data. In the current commonly used deviation based on the analysis of calculation method and the suitable condition, according to the S block formation temperature pressure condition and gas components, using different calculation methods for calculation, the gas deviation factor under different pressure and adjacent regions natural gas high pressure physical properties test results, S block gas deviation factor calculation method for optimization. The research shows that the calculated results of the beggs-Brill method are similar to the test results, and it is appropriate to use the Beggs-Brill method to calculate the natural gas deviation coefficient in Block S.