A Compositional Thermal Multiphase Wellbore Model for Use in Non-Isothermal Gas Lifting

Mahdi Sadri, Hojjat Mahdiyar, Ali Mohsenipour

Research output: Contribution to journalArticle

Abstract

In this paper, a new compositional mechanistic wellbore model, including gas lifting parameters, is presented. In the governing equations of this model, new terms for mass transfer between phases and the enthalpy of phase change which are important in non-isothermal gas lift systems have been considered. These terms have been ignored in some recent research studies and subsequent results show that by ignoring them, serious errors may arise. In the current research study, using a mechanistic drift-flux approach, the pressure distribution in a wellbore was modeled. To verify the new simulator, the results were compared with those of commercial simulators. They were also verified against the phase behavior analysis of the fluid flowing in the wellbore. In addition, in order to show the novel aspects of the new simulator, the results of the presented simulator were compared with the results of a recently proposed model found in the literature. It was concluded that neglecting phase change effects may cause significant errors in calculating pressure and temperature values along wellbores. This error could be significant, up to 24% depending on conditions, when flowing fluid pressure is close to its saturation point or in the case of simulating gas lift operation.
Original languageEnglish
Article number112902
Number of pages12
JournalJournal of Energy Resources Technology
Volume141
Issue number11
Early online date17 May 2019
DOIs
Publication statusPublished - Nov 2019

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Keywords

  • compositional simulator
  • wellbore simulator
  • multiphase flow
  • non-isothermal gas lifting
  • drift-flux model
  • modelling
  • oil and gas production
  • Petroleum Engineering
  • Oil well
  • Multi-phase
  • oil and gas Reservoir
  • Compositional simulator

ASJC Scopus subject areas

  • Energy(all)
  • Engineering(all)
  • Chemical Engineering(all)
  • Fluid Flow and Transfer Processes
  • Computers in Earth Sciences
  • Mechanical Engineering
  • Energy Engineering and Power Technology
  • Geochemistry and Petrology
  • Fuel Technology
  • Renewable Energy, Sustainability and the Environment

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