Reduction of Reservoir Fluid Equilibrium Calculation for Peng-Robinson EOS with Zero Interaction Coefficients
For some of the EOS models the dimension of equilibrium problem can be reduced. Stability and difficulties in implementation are among the problems of flash calculation. In this work, a new reduction technique is presented to prepare a reduced number of equilibrium equations. Afterwards, a number of...
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2017-06-01
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doaj-a9094b90ac794c5c97e71133d29a6bd82020-11-25T01:14:06ZengReaserch Institute of Petroleum IndustryJournal of Petroleum Science and Technology2251-659X2645-33122017-06-0172627610.22078/jpst.2017.749749Reduction of Reservoir Fluid Equilibrium Calculation for Peng-Robinson EOS with Zero Interaction CoefficientsMehdi Assareh0Iran University of Technology Faculty of Chemical EngineeringFor some of the EOS models the dimension of equilibrium problem can be reduced. Stability and difficulties in implementation are among the problems of flash calculation. In this work, a new reduction technique is presented to prepare a reduced number of equilibrium equations. Afterwards, a number of appropriate solution variables are selected for the prepared equation system to solve the equations in an efficient numerical scheme. All the derivatives and solution procedures for the new reduced flash calculation framework were prepared based on Peng-Robinson equation of state. One reservoir oil sample and one gas condensate sample were selected from published literature to evaluate the proposed method for the calculations of reservoir fluids equilibrium. The equilibrium calculations with the proposed reduction technique were compared to full flash calculations. The reduced formulation implementation is simple and straightforward as it is derived from full flash fugacity equality criteria. The presented technique not only reduces the number of equations, and hence simplifies flash problem, but also presents a comparable convergence behavior and offers the same solution system for different reservoir fluid types. The results, demonstrates the proposed method performance and the accuracy for modeling with complex equilibrium calculations like compositional reservoir simulation when there are many components available in the mixture fluid description.https://jpst.ripi.ir/article_749_4eea257147134a41f605b1d0b445e639.pdfreductionflash calculationreservoir fluidspeng-robinsoncubic equation of states |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Mehdi Assareh |
spellingShingle |
Mehdi Assareh Reduction of Reservoir Fluid Equilibrium Calculation for Peng-Robinson EOS with Zero Interaction Coefficients Journal of Petroleum Science and Technology reduction flash calculation reservoir fluids peng-robinson cubic equation of states |
author_facet |
Mehdi Assareh |
author_sort |
Mehdi Assareh |
title |
Reduction of Reservoir Fluid Equilibrium Calculation for Peng-Robinson EOS with Zero Interaction Coefficients |
title_short |
Reduction of Reservoir Fluid Equilibrium Calculation for Peng-Robinson EOS with Zero Interaction Coefficients |
title_full |
Reduction of Reservoir Fluid Equilibrium Calculation for Peng-Robinson EOS with Zero Interaction Coefficients |
title_fullStr |
Reduction of Reservoir Fluid Equilibrium Calculation for Peng-Robinson EOS with Zero Interaction Coefficients |
title_full_unstemmed |
Reduction of Reservoir Fluid Equilibrium Calculation for Peng-Robinson EOS with Zero Interaction Coefficients |
title_sort |
reduction of reservoir fluid equilibrium calculation for peng-robinson eos with zero interaction coefficients |
publisher |
Reaserch Institute of Petroleum Industry |
series |
Journal of Petroleum Science and Technology |
issn |
2251-659X 2645-3312 |
publishDate |
2017-06-01 |
description |
For some of the EOS models the dimension of equilibrium problem can be reduced. Stability and difficulties in implementation are among the problems of flash calculation. In this work, a new reduction technique is presented to prepare a reduced number of equilibrium equations. Afterwards, a number of appropriate solution variables are selected for the prepared equation system to solve the equations in an efficient numerical scheme. All the derivatives and solution procedures for the new reduced flash calculation framework were prepared based on Peng-Robinson equation of state. One reservoir oil sample and one gas condensate sample were selected from published literature to evaluate the proposed method for the calculations of reservoir fluids equilibrium. The equilibrium calculations with the proposed reduction technique were compared to full flash calculations. The reduced formulation implementation is simple and straightforward as it is derived from full flash fugacity equality criteria. The presented technique not only reduces the number of equations, and hence simplifies flash problem, but also presents a comparable convergence behavior and offers the same solution system for different reservoir fluid types. The results, demonstrates the proposed method performance and the accuracy for modeling with complex equilibrium calculations like compositional reservoir simulation when there are many components available in the mixture fluid description. |
topic |
reduction flash calculation reservoir fluids peng-robinson cubic equation of states |
url |
https://jpst.ripi.ir/article_749_4eea257147134a41f605b1d0b445e639.pdf |
work_keys_str_mv |
AT mehdiassareh reductionofreservoirfluidequilibriumcalculationforpengrobinsoneoswithzerointeractioncoefficients |
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1725158912269746176 |