Alexandre Lapene - Academia.edu (original) (raw)
Uploads
Papers by Alexandre Lapene
Fluid Phase Equilibria, 2010
A novel Modified Rachford-Rice equation is developed for three-phase equilibrium calculations in ... more A novel Modified Rachford-Rice equation is developed for three-phase equilibrium calculations in hydrocarbon-water systems, based on the free-water assumption, i.e., the water-rich liquid phase consists of pure water only. In the inner loop of the flash algorithm, the three-phase problem (consisting in a system of two non-linear equations) is replaced by a pseudo-two-phase problem (consisting in a non-linear equation). Unlike previous formulations, the new Modified Rachford-Rice function is guaranteed to monotonically decrease between two adjacent asymptotes. The negative flash concept is used, and a search window is proposed for the vapor fraction. The new free-water flash method proved to be robust, and excellent agreement between full three-phase flash and pseudo-two-phase free-water flash was obtained for various test problems. The proposed method is very useful in compositional reservoir simulation of certain oil recovery methods and in process simulation.
We describe here a new experimental device developed for the study of a combustion front propagat... more We describe here a new experimental device developed for the study of a combustion front propagation in a reactive medium: crushed oil shale (500 to 1000 µm). We are interested in the propagation of a front supplied by air in co-current. The cell is a vertical cylinder of 90mm internal diameter and 300mm height, made up of an insulating material. To start the combustion and to obtain a plane flame front, it was set up a sophisticated device of ignition, namely the cone calorimeter. The reactor is finely instrumented. A whole of thermocouples makes it possible to measure the temperature along the axis for the cell and over a horizontal cross section (at middle height) of the packed bed. The pressure drop and the total mass of the particle bed are continuously recording. A new device was developed and set up to improve the physicochemical investigation of the structure of the flame front: micro-sampling. Its originality lies in the possibility of micro sampling gas at a fined point in the cell before, during and after the passage of the combustion front. Lastly, the oil "pushed" by the flame front is collected in a reservoir placed at the bottom of the reactor.
SPE Reservoir Evaluation & Engineering, 2009
... A. Lapene, SPE, Total SA/Institut de Mecanique des Fluides de Toulouse; LM Castanier, SPE, St... more ... A. Lapene, SPE, Total SA/Institut de Mecanique des Fluides de Toulouse; LM Castanier, SPE, Stanford University; G. Debenest and M. Quintard, Institut de Mecanique des Fluides de Toulouse; AM Kamp, SPE, CHLOE; and B. Corre, SPE, Total SA ...
ABSTRACT Effects of Water on Kinetics of Wet In-situ Combustion
... Combustion and Flame 134: 229247. Bazargan M., Chen B., Cinar M., Glatz G., Lapene A., Zhu Z... more ... Combustion and Flame 134: 229247. Bazargan M., Chen B., Cinar M., Glatz G., Lapene A., Zhu Z., Castanier L., Gerritsen M., and Kovscek A. 2011. ... Christie M., UHW, and Blunt M. 2001. Tenth SPE Comparative Solution Project: A Comparison of Upscaling Techniques. ...
Fluid Phase Equilibria, 2010
A novel Modified Rachford-Rice equation is developed for three-phase equilibrium calculations in ... more A novel Modified Rachford-Rice equation is developed for three-phase equilibrium calculations in hydrocarbon-water systems, based on the free-water assumption, i.e., the water-rich liquid phase consists of pure water only. In the inner loop of the flash algorithm, the three-phase problem (consisting in a system of two non-linear equations) is replaced by a pseudo-two-phase problem (consisting in a non-linear equation). Unlike previous formulations, the new Modified Rachford-Rice function is guaranteed to monotonically decrease between two adjacent asymptotes. The negative flash concept is used, and a search window is proposed for the vapor fraction. The new free-water flash method proved to be robust, and excellent agreement between full three-phase flash and pseudo-two-phase free-water flash was obtained for various test problems. The proposed method is very useful in compositional reservoir simulation of certain oil recovery methods and in process simulation.
We describe here a new experimental device developed for the study of a combustion front propagat... more We describe here a new experimental device developed for the study of a combustion front propagation in a reactive medium: crushed oil shale (500 to 1000 µm). We are interested in the propagation of a front supplied by air in co-current. The cell is a vertical cylinder of 90mm internal diameter and 300mm height, made up of an insulating material. To start the combustion and to obtain a plane flame front, it was set up a sophisticated device of ignition, namely the cone calorimeter. The reactor is finely instrumented. A whole of thermocouples makes it possible to measure the temperature along the axis for the cell and over a horizontal cross section (at middle height) of the packed bed. The pressure drop and the total mass of the particle bed are continuously recording. A new device was developed and set up to improve the physicochemical investigation of the structure of the flame front: micro-sampling. Its originality lies in the possibility of micro sampling gas at a fined point in the cell before, during and after the passage of the combustion front. Lastly, the oil "pushed" by the flame front is collected in a reservoir placed at the bottom of the reactor.
SPE Reservoir Evaluation & Engineering, 2009
... A. Lapene, SPE, Total SA/Institut de Mecanique des Fluides de Toulouse; LM Castanier, SPE, St... more ... A. Lapene, SPE, Total SA/Institut de Mecanique des Fluides de Toulouse; LM Castanier, SPE, Stanford University; G. Debenest and M. Quintard, Institut de Mecanique des Fluides de Toulouse; AM Kamp, SPE, CHLOE; and B. Corre, SPE, Total SA ...
ABSTRACT Effects of Water on Kinetics of Wet In-situ Combustion
... Combustion and Flame 134: 229247. Bazargan M., Chen B., Cinar M., Glatz G., Lapene A., Zhu Z... more ... Combustion and Flame 134: 229247. Bazargan M., Chen B., Cinar M., Glatz G., Lapene A., Zhu Z., Castanier L., Gerritsen M., and Kovscek A. 2011. ... Christie M., UHW, and Blunt M. 2001. Tenth SPE Comparative Solution Project: A Comparison of Upscaling Techniques. ...