TITLE:
Study on Phase Transition and Gas Deviation Coefficient of Natural Gas with High Carbon Dioxide Content
AUTHORS:
Tao Zhou
KEYWORDS:
Natural Gas, Phase Transformation, Deviation Coefficient
JOURNAL NAME:
International Journal of Geosciences,
Vol.13 No.4,
April
11,
2022
ABSTRACT: It is the basic research subject that analyzes and
calculate the law and numerical value of phase change and gas deviation
coefficient of natural gas with high-CO2 content in the process of
safe and effective development of gas reservoirs, which is obtained by high-pressure physical properties
PVT (Pressure-Volume-Temperature) experiments and different calculation methods
calculations. Aiming at natural gas with high-CO2 content in the Dongfang gas field, the
phase change characteristics and physical parameters of different PVT samples
are simulated and tested by Chandler 3000-GL analyzer and PVT SIM software. The
experimental data shows that the phase state of natural gas with different
content of CO2 has not changed in the study range. At the same time,
the deviation coefficient calculated by different calculation methods (DPR,
DAK, BB, HY, Gopal) are compared with the experimental data, and the applicable
scope of different calculation methods are obtained. The results show that the
improved Gopal has high accuracy and is suitable for the calculation of the deviation coefficient of
natural gas with high-CO2 content under high temperature and high
pressure in the Dongfang gas field.