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Journal Articles
Journal: SPE Journal
SPE J. 18 (05): 952–959.
Paper Number: SPE-154477-PA
Published: 30 January 2013
...Michael L. Michelsen; Wei Yan; Erling H. Stenby Summary For compositional transient simulations including compositional reservoir simulations, phase-equilibrium calculation, often formulated as a flash problem, can be time consuming. It is therefore important to speed up the calculation of phase...
Proceedings Papers

Paper presented at the SPE Europec/EAGE Annual Conference, June 4–7, 2012
Paper Number: SPE-154477-MS
... C a i j x i x j a i j   =   a i i a j j ( 1   −   k i j ) Abstract Speeding up flash calculation is a central issue in compositional reservoir simulations since phase equilibrium calculation is the most time...
Proceedings Papers

Publisher: Society of Petroleum Engineers (SPE)
Paper presented at the SPE Reservoir Simulation Conference, October 26, 2021
Paper Number: SPE-203956-MS
... the equilibrium behavior of oil-gas-brine systems within the practical range of pressure and temperature. The three-phase flash algorithm is validated against published data from the available literature. The multiphase flash procedure is implemented to generate linearized physical properties by using an Operator...
Journal Articles
Journal: SPE Journal
SPE J. 25 (06): 3332–3348.
Paper Number: SPE-202472-PA
Published: 17 December 2020
...Haining Zhao; Hongbin Jing; Zhengbao Fang; Hongwei Yu Summary On the basis of a previously published reduced‐variables method, we demonstrate that using these reduced variables can substantially accelerate the conventional successive‐substitution iterations in solving two‐phase flash (TPF) problems...
Proceedings Papers

Paper presented at the SPE/IATMI Asia Pacific Oil & Gas Conference and Exhibition, October 29–31, 2019
Paper Number: SPE-196427-MS
... the saturation pressure of an oil sample based on the application of flash calculations tuned with a modern optimization algorithm. The saturation pressure is the only one at which the total product value of Z i (mole fraction of component i in the entire hydrocarbon mixture) by K i (pressure dependent...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, August 31–September 4, 2020
Paper Number: SPE-200407-MS
... (2019) also adapted their previous flash calculation algorithm ( Kou and Sun, 2016 ) to include capillary pressure. Sandoval et al. (2019) discussed the advantage of using the variable space of the Helmholtz free energy that it simplifies the derivatives of volume-explicit capillary pressure models...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 11–14, 2019
Paper Number: SPE-197677-MS
..., this approval is void. When flash back from a thermal combustion unit occurs, endurance burning is one of the highest potentials of risk, that may result if flame arresters are installed in-line and no additional measures, like temperature sensors are installed to detect the stable flame that has settled...
Proceedings Papers

Paper presented at the ARMA-CUPB Geothermal International Conference, August 5–8, 2019
Paper Number: ARMA-CUPB-19-1417
... ABSTRACT: Due to better temperature matching of source and working fluid during heat addition, Organic Flash Cycles (OFCs) are suitable for geothermal power generation driven by medium-low temperature sources. In this paper, thermodynamic analysis of basic OFC (BOFC), and four modified...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, April 10–11, 2019
Paper Number: SPE-193878-MS
.... Abstract In this work, we present the development of a compositional simulator accelerated by proxy flash calculation. We aim to speed up the compositional modeling of unconventional formations by stochastic training. We first developed a standalone vapor-liquid flash calculation module...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, April 10–11, 2019
Paper Number: SPE-193896-MS
... on the phase equilibrium calculations is huge, especially for the phase stability tests. In this work, we propose artificial neural network (ANN) models to accelerate the phase flash calculations in compositional simulations. For the phase stability tests, an ANN model is built to predict the saturation...
Journal Articles
J Pet Technol 70 (10): 58–60.
Paper Number: SPE-1018-0058-JPT
Published: 01 October 2018
...Chris Carpenter This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper SPE 190242, “Simulation of Water and Condensate Blockage and Solvent Treatments in Tight Formations Using Coupled Three-Phase Flash and Capillary-Pressure Models,” by Sajjad S. Neshat, SPE...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, April 14–18, 2018
Paper Number: SPE-190207-MS
..., the phase compositions are converted back from pseudo-phase space to the original composition space. This model is the first comprehensive and mechanistic flash calculation algorithm based on HLD-NAC and pseudo-phase theory to calculate microemulsion properties for mixtures without the assumption of pure...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, April 14–18, 2018
Paper Number: SPE-190242-MS
... the use of solvents for blockage removal. A cubic equation of state is used to model the phase behavior of three-phase mixtures of solvent, hydrocarbons and water. The three-phase flash model is coupled with a rigorous three-phase capillary pressure model to account for the effect of capillary pressure...
Journal Articles
Journal: SPE Journal
SPE J. 23 (02): 535–549.
Paper Number: SPE-182706-PA
Published: 09 January 2018
...Duncan Paterson; Michael L. Michelsen; Erling H. Stenby; Wei Yan Summary Two algorithms are proposed for isothermal multiphase flash. These are referred to as modified RAND and vol-RAND. The former uses the chemical potentials and molar-phase amounts as the iteration variables, while the latter...
Journal Articles
Journal: SPE Journal
SPE J. 23 (02): 498–521.
Paper Number: SPE-175060-PA
Published: 30 November 2017
...Di Zhu; Sara Eghbali; Chandra Shekhar; Ryosuke Okuno Summary The conventional method for multiphase flash is the sequential usage of phase-stability and phase-split calculations. Multiphase flash requires the conventional method to obtain multiple false solutions in phase-split calculations...
Proceedings Papers

Paper presented at the ASSE Professional Development Conference and Exposition, June 19–22, 2017
Paper Number: ASSE-17-655
... occasions during the transfer, handling, processing, and packaging of flammable liquids and powders in a chemical plant flash fire and explosion hazards exist. This paper shall discuss the practical measures that can be considered to prevent/control electrostatic ignition hazards that are associated...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, February 20–22, 2017
Paper Number: SPE-182702-MS
... After the stability test, an initial phase-split is needed before the start of a flash algorithm. Two different choices for the initial split are described in this section, where the first is the default choice, and the second is attempted only if the first failed to converge to a non-trivial...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, February 20–22, 2017
Paper Number: SPE-182653-MS
... in surfactant flood simulations. In this study, therefore, we propose a new gaseous/oleic/microemulsion/aqueous phase flash algorithm to couple the hydrocarbon phase behavior with the surfactant phase behavior in our FIM simulator using a new set of non-linear solution variables. Instead of using the phase...
Proceedings Papers

Paper presented at the SPE Reservoir Simulation Conference, February 20–22, 2017
Paper Number: SPE-182706-MS
... Abstract Two algorithms are proposed for isothermal multiphase flash. These are referred to as modified RAND and vol-RAND. The former uses the chemical potentials and phase amounts as the iteration variables while the latter uses chemical potentials and phase volumes to co-solve a pressure...
Proceedings Papers

Paper presented at the SNAME Maritime Convention, November 1–5, 2016
Paper Number: SNAME-SMC-2016-068
... energy synchronous generator ieee 1584 generator calculation new york fault current arc current Calculation of Arc-Flash Energy from AC Synchronous Generator Abstract: Determining the arc fault hazard of an electrical installation requires calculating the available arc current, then deriving...

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