Production Optimization of a Rigorous Thermal and Compositional Reservoir Flow Model

Tobias Kasper Skovborg Ritschel*, John Bagterp Jørgensen

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

We model thermal and compositional reservoir production as mass and energy balances combined with a phase equilibrium constraint. The phase equilibrium constraint is modeled as a thermodynamically rigorous UV flash process. The UV flash problem is a mathematical statement of the second law of thermodynamics, and it replaces the condition of equality of fugacities that is often used. We demonstrate that such a thermal and compositional reservoir model is in a semi-explicit index-1 differential-algebraic form, and we briefly describe a gradient-based single-shooting algorithm for the solution of production optimization problems. We implement the algorithm in C/C++ using the software DUNE, the thermodynamic software ThermoLib, and the optimization software KNITRO. We present an example of optimal water flooding where the injected water has a higher temperature than the reservoir fluid.
Original languageEnglish
Book seriesI F A C Workshop Series
Volume51
Issue number8
Pages (from-to)76-81
ISSN1474-6670
DOIs
Publication statusPublished - 2018
Event3rd IFAC Workshop on Automatic Control in Offshore Oil and Gas Production - Aalborg University, Esbjerg , Esbjerg, Denmark
Duration: 30 May 20181 Jun 2018

Conference

Conference3rd IFAC Workshop on Automatic Control in Offshore Oil and Gas Production
LocationAalborg University, Esbjerg
CountryDenmark
CityEsbjerg
Period30/05/201801/06/2018

Keywords

  • Thermal
  • Compositional model
  • Phase equilibrium
  • Optimal control

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