%0 Journal Article
%A CHEN Jian
%A HU Lin
%A WANG Wenjuan
%A ZHANG Qiaoliang
%A LU Ruibin
%T The Expansion and Application of Deviation Factor Chart of Super-high Pressure and High CO_{2} Gas Reservoir
%D
%R 10.11885/j.issn.1674-5086.2020.06.13.01
%J Journal of Southwest Petroleum University(Science & Technology Edition)
%P 97-104
%V 45
%N 1
%X Standing-Katz plate is one of the most common and basic methods to determine the deviation factor of natural gas. However, there are some problems, such as large error in manual reading, limited use of natural gas with super-high pressure (*p*_{pr}>15) and high CO_{2} content. We design a single component deviation factor measurement experiment, and combined with the changing rule of the curve of the Standing-Katz plate, expand the *p*_{pr} to 30, the *T*_{pr} to 3.6, and digitize the plate. Through different CO_{2} content deviation factor tests, and a new calculation model of pseudo critical pressure and pseudo critical temperature of natural gas considering different CO_{2} content is derived. Compared with the conventional non-hydrocarbon correction model, the new model has higher calculation accuracy and wider application range. Furthermore, the new correction model is embedded in the deviation factor expansion chart, and the software is used. The deviation factor expansion chart considering different CO_{2} content has a smaller error (≤3 %) in the calculation of the deviation factor of HTHP and high CO_{2} content natural gas in the west of South China Sea, and the application effect is better.
%U http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.11885/j.issn.1674-5086.2020.06.13.01