西南石油大学学报(自然科学版)

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The Comprehensive Evaluation of the Deviation Factor Calculation of Natural Gas in Northeast Sichuan

Xiong Zhifu*, Deng Jinhua, Chen Dan   

  1. Research Institute,Exploration Company,SINOPEC,Chengdu,Sichuan 610041,China
  • Online:2015-08-01 Published:2015-08-01

Abstract:

Natural gas deviation factor is one kind of important data that can be obtained through PVT experiment or calculation
methods. Because the applicable conditions and accuracy of its calculation methods are not particularly clear in Northeast
Sichuan,evaluation is carried out to study the various calculation methods. Based on the comparative analysis and evaluation
on the predictions with four kinds of common calculation methods,deviation factor z-value in Standing-Katz chart under
pseudo-reduced pressure and temperature and the measured z-value of natural gas deviation factor in Northeast Sichuan,the
scope of various calculation methods is proposed. It is pointed out that both DAK and DPR methods have wide practical scope
and higher accuracy,besides,they are applicable to calculate the deviation factor of gas reserves under high temperature and
high pressure in northeast Sichuan.

Key words: northeast Sichuan, sour gas, deviation factor, compressibility factor, calculation methods