Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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A Novel Approach for Well-Test Analysis of Volatile Oil Reservoirs in Two-Phase Flow Conditions

  • Baniasadi, Hamid (Department of Petroleum Engineering, Amirkabir University of Technology) ;
  • Rashidi, Fariborz (Department of Chemical Engineering, Amirkabir University of Technology)
  • Received : 2019.07.17
  • Accepted : 2019.09.03
  • Published : 2019.12.01
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Abstract

Two-phase flow near the wellbore in volatile oil reservoirs causes complications in well test analysis. In this study, the flow behavior of volatile oil reservoirs below the bubble-point pressure and the potential of radial composite model for interpretation of two-phase well test in volatile oil reservoirs was investigated. A radial composite model was used for two-phase well test analysis. A new procedure was developed to interpret well test data and estimate the radius of the two-phase region. The changes in fluid composition near the wellbore during drawdown test were found to increase the saturation pressure, which affects the saturation profile during build-up. Well test results showed that the radial composite method is a powerful tool for well test characterization and estimation of reservoir parameters. The proposed procedure was able to estimate the reservoir parameters and radius of the two-phase region with acceptable accuracy.

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References

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