We invite you to SPE young professionals meeting on "Digital Core: State of the Art Tool for Multiphase Reactive Flow Simulation at Pore Scale".
SPE Young Professionals meeting, December 13, 2018
The presentation will be delivered in English.
Meeting will take place on December 13, at 1900 hours at Pokrovskiy bulvar 3 bld. 1, Moscow.
Meeting is open for everyone, not only young professionals!
Preliminary registration is required!
Looking forward to seeing you!
Entry is strictly according to the passport. No jeans, strictly office style.
Acidizing of a well is one of the methods used to intensify hydrocarbon production. Acidizing job design relies on laboratory experiments and simulation of treatment fluid impact on transport properties of the rock. The added value of simulation-based screening of acidizing scenarios can hardly be overestimated, since the amount of the core material available is usually not enough for comprehensive laboratory analysis. Most of the available simulators use as an input several empirical coefficients. The choice of the coefficient values significantly affects the simulation outcome. Better understanding of acidizing process at pore scale is of paramount importance for a proper choice of the coefficients.
We developed a pore-scale image based direct reactive flow modeling approach. This approach is based on a combination of the principles of chemical kinetics/thermodynamics and the density functional theory applied for hydrodynamics (DFH). DFH proved itself to be very effective for pore-scale modelling of multiphase flow regarding its ability to handle complex physical phenomena. Chemical reactions are introduced to hydrodynamic simulation within the framework of a partial local equilibrium assumption.
In the current study, it is demonstrated that developed approach adequately describes dissolution of dolomite rock by solution of hydrochloric acid. Simulations have been performed using 2D model of dolomite granule, 2D model of porous structure and 3D model of Silurian dolomite microstructure. Upon acid injection, the geometry of a rock is gradually changing along the path of acid penetration. The modeling results reveal the dependence of dolomite dissolution rate on the rate of fluid injection. Using the developed approach, it was also demonstrated that release of gaseous CO2 influences the rate of mineral dissolution. The correlations obtained from reactive fluid flow with exact geometry can be utilized for amendment of the reaction rate constants which are used for large scale simulations.
The suggested approach for reactive fluid flow simulation allows to test numerous “what if” scenarios and to evaluate the effect of different factors on mineral dissolution rate at pore scale. It paves the way for increasing the consistency between the models used for reactive flow modeling and pore scale heterogeneity of real rocks, which will lead to improvements in acidizing job design.
Anna graduated from Chemistry Department of the Lomonosov Moscow State University (Moscow, Russia) in 2010 In 2013 she got PhD degree in Chemistry from the same institution. Since 2007 to 2013 she worked as an engineer in Moscow State University and contributed into multiple research projects devoted to the investigation of catalytic reactions mechanisms and establishment of structure-property relationship using quantum chemical simulations. In 2014 Anna joined Schlumberger Moscow Research as a Research Scientist. Currently she is working in the position of Senior Research Scientist. Her current research activity is focused on pore scale simulations of minerals dissolution.
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