计算天然气偏差因子的DAK方法的修正

doi:10.11743/ogg20130116

Abstract

Abstract:

DAK method for natural gas Z-factor calculation can yield relatively more accurate result compared with other methods and therefore is widely used in the petroleum industry.However,our analysis shows that the method generates results with large errors when both pressure and temperature are high.The paper presents a modification of the method based on optimization.Also presented here is an analysis of the relative errors of the calculation results on a two-dimensional plane consisting of isobars and isotherms.The results indicate that,compared with the original DAK method,the revised method can further improve the accuracy of Z-factor for natural gas.

Key words: Z-factor, state equation, calculating method, natural gas

CLC Number:

TE155

Hu Jianguo, Guo Fenqiao, Xu Jinjin. Modification of the DAK method for natural gas Z-factor calculation[J]. Oil & Gas Geology, 2013, 34(1): 120-123.

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Modification of the DAK method for natural gas Z-factor calculation

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