24 results on '"Thibaud Chevalier"'
Search Results
2. Graph-Based M-tortuosity Estimation.
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Adam Hammoumi, Maxime Moreaud, Elsa Jolimaitre, Thibaud Chevalier, Alexey Novikov, and Michaela Klotz
- Published
- 2021
- Full Text
- View/download PDF
3. Characterization of foam flowing in a granular medium in the presence of oil by small angle neutron scattering
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N. Gland, Loïc Barré, Raphaël Poryles, Thibaud Chevalier, and Elisabeth Rosenberg
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Materials science ,Scattering ,Incoherent scatter ,Scattering length ,02 engineering and technology ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Small-angle neutron scattering ,0104 chemical sciences ,Condensed Matter::Soft Condensed Matter ,Surface-area-to-volume ratio ,Volume (thermodynamics) ,Phase (matter) ,Composite material ,0210 nano-technology ,Porous medium - Abstract
We present an experimental study of foam-flow characterization inside a 3D granular medium packed in a cell. The foam is formed by coinjecting a surfactant solution and gas inside a cell filled with silica grains. The porous medium is initially saturated with dodecane and water before the gas-surfactant coinjection. To simplify the interpretation of the measurements, a contrast matching methodology has been applied in order to obtain a two phase system regarding the scattering length density values. The combination of transmission and incoherent scattering allows us to estimate the volume fractions of each phase, whereas the coherent scattering is used to estimate the surface to volume ratio S/V related to water-oil and water-gas interfaces. Considering the evolution of S/V ratio, volume fractions and pressure difference, we infer some mechanisms of foam generation and transportation as well as oil removal.
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- 2020
4. Clay platelet orientation inside self-standing beidellite clay films: Effect of silica nanospheres and link with macroscopic mechanical resistance
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Sivagen Vydelingum, Pierre Levitz, Laurent J. Michot, Thomas Bizien, Pierre Rabu, Ovidiu Ersen, Thibaud Chevalier, and Natalie Malikova
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Geochemistry and Petrology ,Geology - Published
- 2023
5. Quantification of Microemulsion Systems Using Low-Field T1-Weighted Imaging
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Christine Dalmazzone, Marc Fleury, Thibaud Chevalier, Delphine Herrera, and IFP Energies nouvelles (IFPEN)
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Materials science ,Field (physics) ,Capillary action ,Biomedical Engineering ,Biophysics ,02 engineering and technology ,010402 general chemistry ,microemulsion ,01 natural sciences ,NMR ,quantification ,0104 chemical sciences ,Characterization (materials science) ,020401 chemical engineering ,Proof of concept ,[SDE]Environmental Sciences ,T1 weighted ,[CHIM]Chemical Sciences ,Radiology, Nuclear Medicine and imaging ,Microemulsion ,Enhanced oil recovery ,0204 chemical engineering ,Biological system ,Porosity ,T1-weighted - Abstract
International audience; Applied to Enhanced Oil Recovery, microemulsions are valuable systems for extracting the crude oil trapped by capillary forces in the porous reservoir rocks. The performances of the injected formulations are often assessed by quantifying oil composition in model systems that contain relatively high amount of surfactant/co-surfactant. Recently, the question of representativity of such systems was raised because kinetics aspects and complexity of crude were neglected in model systems and are likely to impact the process efficiency. The current quantification techniques limit the characterization of representative model systems as they are destructive, time consuming and not often applicable to dark or opaque systems. In the original aim to provide a quantitative kinetic study of such microemulsions, we propose a high resolution T1-weighted imaging technique to have access to 1D-composition profiles of co-surfactant, oil and brine in Winsor I, Winsor III and Winsor II microemulsions. The analysis is carried out on model systems at equilibrium for proof of concept. Results are correlated with X-Ray Micro-CT experiments to provide better interpretations and assess the method accuracy. We provide conditions of validity of the developed NMR method and discuss its potential limitations. To a larger extent, the method could be of interest to other applications that use similar systems.
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- 2021
6. Monitoring the formation kinetics of a bicontinuous microemulsion
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Delphine Herrera, Thibaud Chevalier, Didier Frot, Loïc Barré, Audrey Drelich, Isabelle Pezron, and Christine Dalmazzone
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Biomaterials ,Colloid and Surface Chemistry ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials - Abstract
The performance of bicontinuous microemulsions is usually assessed on the characteristics of the middle phase at equilibrium. However, applied to Enhanced Oil Recovery, such an evaluation would not be representative of the structure and composition of fluids in reservoir rocks. Studies on the properties of non-equilibrated microemulsions are still needed to better understand the formation of such complex systems, in particular to optimize input parameters of process simulation tools.For this purpose, we monitored the formation of a microemulsion from contact with the oil to equilibrium when no mixing or convection is provided. Non-destructive methods such as Nuclear Magnetic Resonance, Micro-Computed Tomography, Dynamic Light Scattering and Small Angle X-ray scattering were used to extract the compositions, phase thicknesses, dynamics and structures of the system over time.We found that the system gets structured into several layers over time that include the transient presence of an oriented semi-crystalline phase. The growth of the bicontinuous middle phase results from a progressive reorganization of the liquid crystal. The compositional and structural gradients, observed along the sample height, are correlated and linked to the corresponding structures of the phase diagram of the quaternary system. Equilibrium is reached after the total transfer of the liquid crystal into the bicontinuous phase.
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- 2021
7. A Practical Methodology to Screen Oil Recovery Processes Involving Spontaneous Imbibition
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Thibaud Chevalier, Marc Fleury, Aline Delbos, T. Clemens, V. M. Waeger, Bernard Bourbiaux, Julien Labaume, IFP Energies nouvelles (IFPEN), and OMV [Vienne]
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[PHYS]Physics [physics] ,Materials science ,Capillary action ,Countercurrent exchange ,General Chemical Engineering ,diffusion ,0208 environmental biotechnology ,Kinetics ,wettability ,[SDU.STU]Sciences of the Universe [physics]/Earth Sciences ,02 engineering and technology ,Mechanics ,010502 geochemistry & geophysics ,01 natural sciences ,NMR ,Catalysis ,020801 environmental engineering ,Surface tension ,imbibition ,chemical recovery ,Imbibition ,Wetting ,Diffusion (business) ,Saturation (chemistry) ,0105 earth and related environmental sciences - Abstract
International audience; We present a general novel technique to monitor saturation changes on small rock samples of only 15 mm in diameter and 20 mm in length for the purpose of assessing the kinetics of spontaneous imbibition processes. With a fully-3D imbibition configuration involving counter-current flows through all faces of the sample, the method is based on a NMR technique in which the sole oil phase present within the sample is monitored. The experimental method is fast for two reasons that are i) the possibility to perform accurate measurements on tiny samples, ii) the adoption of a 3D flow geometry. The kinetics of oil desaturation during spontaneous imbibition is analyzed with the help of an analytical 3D diffusion model, according to which the kinetics is proportional to the value of a "capillary" diffusion coefficient. For the purpose of demonstrating our methodology, we used this technique to compare the spontaneous imbibition of restored sandstone miniplugs from a sandstone reservoir, with and without alkali in the imbibing brine. The imbibition kinetics was quantified as capillary diffusion coefficient values. The studied case results revealed mixed impacts of alkali on the spontaneous imbibition kinetics, involving both a brine-oil interfacial tension change and a wettability alteration of the rock, the latter requiring further investigation beyond the scope of this article. List of symbols EOR Enhanced oil recovery IFT Interfacial tension [N/m] NMR Nuclear magnetic resonance D, 2r Diameter of the core (r: radius) [m] D c Capillary diffusion coefficient [m 2 /s] D e Effective molecular diffusion coefficient [m 2 /s] D m Molecular diffusion coefficient [m 2 /s] K Single-phase permeability [m²] k rw , k ro Relative permeabilities to water (w) and oil (o) L, 2l Length of the core (l: half length) [m] w, o Relative mobility for water (w) and oil (o) [Pa-1 .s-1 ] w , o Viscosities of water (w) and oil (o) [Pa.s] Pc Capillary pressure [Pa] Porosity of the core S w , S o Water (w) and oil (o) saturation S w *, S o * Scaled water (w) and oil (o) saturation (cf eq (3)) S wi , S oi Initial water (w) and oil (o) saturation S of Final oil saturation T 2 Transverse relaxation time [s] V Bulk volume of the sample [m 3 ] V p Porous volume [m 3 ] V o Oil volume in the core [m 3 ] V oi Initial oil volume in the core [m 3 ] ACKNOWLEDGEMENTS We thank OMV for allowing us to publish the results. Wolfgang Hujer is also acknowledged for providing laboratory data and rock description.
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- 2019
8. A novel physisorption model based on mathematical morphology operators preserving exact pore morphology and connectivity
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Adam Hammoumi, Maxime Moreaud, Dominique Jeulin, Elsa Jolimaitre, Thibaud Chevalier, Loïc Sorbier, Michaela Klotz, and Alexey Novikov
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Mechanics of Materials ,General Materials Science ,General Chemistry ,Condensed Matter Physics - Published
- 2022
9. Quantification of microemulsion systems using low-field T
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Delphine, Herrera, Thibaud, Chevalier, Marc, Fleury, and Christine, Dalmazzone
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Kinetics ,Surface-Active Agents ,Emulsions ,Porosity - Abstract
Applied to Enhanced Oil Recovery, microemulsions are valuable systems for extracting the crude oil trapped by capillary forces in the porous reservoir rocks. The performances of the injected formulations are often assessed by quantifying oil composition in model systems that contain relatively high amount of surfactant/co-surfactant. Recently, the question of representativity of such systems was raised because kinetics aspects and complexity of crude were neglected in model systems and are likely to impact the process efficiency. The current quantification techniques limit the characterization of representative model systems as they are destructive, time consuming and not often applicable to dark or opaque systems. In the original aim to provide a quantitative kinetic study of such microemulsions, we propose a high resolution T
- Published
- 2021
10. Water diffusion measurements in cement paste, mortar and concrete using a fast NMR based technique
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W. Dridi, Thibaud Chevalier, Marc Fleury, M. Adadji, Guillaume Berthe, IFP Energies nouvelles (IFPEN), Service d'Etudes du Comportement des Radionucléides (SECR), Département de Physico-Chimie (DPC), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, and ORANO
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Materials science ,Composite number ,CEM V ,0211 other engineering and technologies ,Cement ,020101 civil engineering ,02 engineering and technology ,0201 civil engineering ,law.invention ,[SPI.MAT]Engineering Sciences [physics]/Materials ,[PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph] ,Effective diffusion ,law ,CEM I ,021105 building & construction ,General Materials Science ,Composite material ,Diffusion (business) ,Porosity ,Civil and Structural Engineering ,Building and Construction ,Cement paste ,NMR ,Mortar ,Portland cement ,Diffusion curve ,Pore diffusion ,Concrete - Abstract
International audience; With a NMR based fast diffusion measurement technique we performed a comprehensive experimental program on 30 samples to measure the pore diffusion coefficient in two series of cement pastes, mortar and concrete made with an ordinary Portland cement (CEM I) and a composite cement (CEM V). In addition, measurements were also possible in the presence of fibers and their effect could be evaluated. The principle is to monitor a deuterium-water exchange in a well-defined cylindrical geometry. The NMR technique allows the measurement of 1H concentration inside the sample as a function of time, while ignoring 1H outside the sample. Using well known analytical formulations, the diffusion curve can be fitted to obtain the pore diffusion coefficient of the material.The results are first presented in terms of the measured pore diffusion coefficients at 30 °C characterizing the porous network independently of porosity. For CEM I based materials, the measured values are Dp = 7.6 ± 1.4x10−12 m2/s for pastes, 40 ± 20x10−12 m2/s for pastes with fibers, 9.5 ± 0.6x10−12 m2/s for mortars, 4.4 ± 0.2x10−12 m2/s for concretes and 28 ± 7x10−12 m2/s for concretes with fibers. For CEM V based materials, the measured values are Dp = 1.1 ± 0.4x10−12 m2/s for pastes, 9.3 ± 2.7x10−12 m2/s for pastes with fibers, 0.8 ± 0.1x10−12 m2/s for mortars, 5.9 ± 2.2x10−12 m2/s for concretes and 5.3 ± 0.8x10−12 m2/s for concretes with fibers. In all cases, the fibers produce an increase of Dp together with a sample dependent result within a set of 3. When expressed in terms of effective diffusion by taking into account the porosity that can be exchanged by D2O estimated during the diffusion experiments, the results were found in agreement with a few existing values measured with HTO through diffusion techniques (Dp = 2.1 ± 0.4×10−12 m2/s for the CEMI paste, 1.1 ± 0.06×10−12 m2/s for the CEMI mortar, 0.12 ± 0.02×10−12 m2/s for the CEMV concrete with fibers).
- Published
- 2020
11. Probing Multiscale Structure and Dynamics of Waxy Crude Oil by Low-Field NMR, X-ray Scattering, and Optical Microscopy
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Pierre Levitz, Imane Yalaoui, Thierry Palermo, Myriam Darbouret, Thibaud Chevalier, Loïc Barré, Guillaume Vinay, PHysicochimie des Electrolytes et Nanosystèmes InterfaciauX (PHENIX), Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), IFP Energies nouvelles (IFPEN), Centre scientifique et Technique Jean Feger (CSTJF), and TOTAL FINA ELF
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Materials science ,Field (physics) ,General Chemical Engineering ,Energy Engineering and Power Technology ,law.invention ,Optical microscope ,law ,Cross Polarized Microscopy ,Scale structure ,n-paraffins crystallization ,[CHIM]Chemical Sciences ,bulk ,waxy oil ,MESH: Crystals, Lipids ,Liquids ,X-ray scattering ,Petrochemicals ,wax ,Wax ,Scattering ,X-ray ,[CHIM.CATA]Chemical Sciences/Catalysis ,Crude oil ,NMR ,Wax deposition ,Fuel Technology ,Chemical engineering ,visual_art ,visual_art.visual_art_medium ,X-ray Scattering - Abstract
International audience; Wax deposition is one of the major concerns for waxy crude oil production and transportation. A better understanding and prediction of fluid properties related to this issue require knowledge of the medium structuration at scales ranging from nanometers (molecules) to a few micrometers (crystals). For this purpose, the behavior of a waxy crude oil in the bulk was compared to that of a model oil over a wide range of temperatures above and below the wax appearance temperature. The combined use of cross-polarized microscopy (CPM) and the implementation of innovative techniques for the field such as small- and wide-angle X-ray scattering and low-field nuclear magnetic resonance has provided a more precise idea of the structure of these two types of fluids. If the nature of the orthorhombic crystals and their lamellar shape are identical for both fluids, a very appreciable difference is highlighted in their chain axis dimensions. The n-paraffin crystal size is larger than 120 nm in the model oil. In crude oil, it is only about 1–10 nm with a long-range order in the directions perpendicular to the chain axis and a monomolecular thickness in the chain axis. Moreover, from the model oil CPM images, we observed aggregates of lamellar shape crystals. Because the model oil does not contain asphaltenes and resins, the crystals are larger and the branches divide significantly less than in crude oil, which results in a trapped liquid proton population unobservable in the model oil. All these observations give a vision of the structure of n-paraffin crystals. It is made of aggregates of relatively dense lamellae in the center and more aerated lamellae at the periphery, which split into several branches.
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- 2020
12. Quasi-two-dimensional foam flow through and around a permeable obstacle
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Stéphane Santucci, Thibaud Chevalier, Natalia Shmakova, Christophe Raufaste, Antti Puisto, Mikko J. Alava, Lavrentyev Institute of Hydrodynamics (LIH), SBRAS, Department of Applied Physics and COMP CoE (Aalto University School of Science), Aalto University, Université Côte d’Azur, CNRS, INPHYNI, Nice, France, Laboratoire de Physique de l'ENS Lyon (Phys-ENS), École normale supérieure - Lyon (ENS Lyon)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon, IFP Energies nouvelles (IFPEN), Institut de Physique de Nice (INPHYNI), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA), Complex Systems and Materials, Department of Applied Physics, and Aalto-yliopisto
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Materials science ,Computational Mechanics ,Motion (geometry) ,Deformation (meteorology) ,01 natural sciences ,010305 fluids & plasmas ,Physics::Fluid Dynamics ,0103 physical sciences ,Symmetry breaking ,[PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph] ,PLASTICITY ,010306 general physics ,ComputingMilieux_MISCELLANEOUS ,Fluid Flow and Transfer Processes ,[PHYS]Physics [physics] ,HETEROGENEOUS POROUS-MEDIA ,Liquid fraction ,ELASTICITY ,2-DIMENSIONAL FLOW ,REARRANGING DISORDERED PATTERNS ,Mechanics ,CIRCULAR OBSTACLE ,Condensed Matter::Soft Condensed Matter ,Flow (mathematics) ,MOBILITY ,Modeling and Simulation ,Obstacle ,[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] - Abstract
We present an experimental study of a two-dimensional liquid foam, composed of a confined monolayer of bubbles, forced to flow within a model porous medium that mimics an inhomogeneous open fracture. It consists of a Hele-Shaw cell with a single localized constriction-like defect that reduces locally its gap and thus its permeability. Taking advantage of the possibility to directly visualize and follow the bubbles, we compute the bubble velocity field by image correlation analysis, as well as the bubble deformation field, through eccentricity measurements obtained by fitting each bubble with an ellipse. The defect acting as a permeable obstacle can strongly disturb the foam flow; we investigate here the influence of its geometry (height, size, and shape) on the average steady-state flow of foams of various liquid content, and specifically the motion and deformation of their elementary components, the bubbles. In the frame of the flowing foam, we can observe a recirculation around the obstacle, characterized by a multipolar velocity field. Its complex structure displays a strong fore-aft asymmetry, with an extended region downstream the constriction, where the foam velocity can be much larger than the imposed driving one. This overshoot was already revealed for nonpermeable obstacles, but here we show that its extent and intensity are associated to the bubble deformation and depend strongly and nontrivially on both the geometry of the constriction as well as the liquid fraction of the foam.
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- 2020
13. Foam trapping in a 3D porous medium: in situ obser- vations by ultra-fast X-ray microtomography
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N. Gland, Loïc Barré, Raphaël Poryles, Andrew King, Elisabeth Rosenberg, Thibaud Chevalier, IFP Energies nouvelles (IFPEN), Synchrotron SOLEIL (SSOLEIL), and Centre National de la Recherche Scientifique (CNRS)
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Materials science ,X-ray microtomography ,Foam transport in 3D porous media ,0208 environmental biotechnology ,pore scale ,porous medium ,02 engineering and technology ,General Chemistry ,Trapping ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Synchrotron ,020801 environmental engineering ,law.invention ,Condensed Matter::Soft Condensed Matter ,law ,Temporal resolution ,[SDE]Environmental Sciences ,Texture (crystalline) ,X-ray . microtomography ,Composite material ,0210 nano-technology ,Porous medium ,Image resolution ,Pressure gradient - Abstract
International audience; One of the challenges in the study of foam transport in 3D porous media is having an adequate spatial and temporal resolution, to get a better understanding of the local phenomenon at the pore scale in a non-destructive way. We present an experimental study in which ultra fast X-Ray microtomography is used to characterize the foam trapping while the foam is flowing in a 3D porous medium. A preformed aqueous foam is injected into a rotating cell containing a 3D granular medium made of silica grains. The use of rotating seals allows the cell to rotate continuously at the rate of one revolution per second, compatible with the fast X-ray tomography at SOLEIL synchrotron. We visualize the foam flow and track the trapping of bubbles with an acquisition time of about one second and a spatial resolution of a few microns (pixel size of one micron). This allows us to extract characteristics and reliable statistics about trapped bubbles inside the granular medium and to observe their local behavior. With this setup and technique we access to the dynamics of foam trapping during the flow and the texture variations of the foam in the trapped zones. These local trapping events are well correlated with the macroscopical measurement of the pressure gradient over the cell.
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- 2020
14. Efficient Pore Network Extraction Method Based on the Distance Transform
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Michaela Klotz, Alexey Novikov, Adam Hammoumi, Thibaud Chevalier, Elsa Jolimaitre, and Maxime Moreaud
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0209 industrial biotechnology ,Computer science ,ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION ,Image processing ,02 engineering and technology ,Filter (signal processing) ,Microstructure ,GeneralLiterature_MISCELLANEOUS ,Image (mathematics) ,Characterization (materials science) ,Maxima and minima ,020901 industrial engineering & automation ,0202 electrical engineering, electronic engineering, information engineering ,020201 artificial intelligence & image processing ,Porous medium ,Distance transform ,Algorithm ,Network model - Abstract
Digital twins of materials allow to achieve accurate predictions that help creating novel and tailor-made materials with higher standards. In this paper, we are interested in the characterization of porous media. Our attention is drawn to develop a method to describe accurately the pore network microstructure of porous materials as presented in [7]. This work proposes an efficient algorithm based on the distance transform method [12] which is a widely used method in image processing. The followed approach suggests that a distance transform map, obtained from a microstructure image, passes through different steps. Starting from local maxima extraction and filtering operation, to end up with another distance transform with source propagation. We illustrate our algorithm with the well-known Pore Network Model of the literature [13], which supposes that the pore structure is either a network of connected cylinders or cylinders and spheres. Our approach is also applied on multi-scale Boolean random models modelling complex porous media microstructures [11]. The porous media morphological characteristics extracted could be used to simulate complex phenomena as the physisorption isotherms or other experimental techniques.
- Published
- 2020
15. Experimental and numerical determination of Darcy's law for yield stress fluids in porous media
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Daniela Bauer, Guillaume Batôt, Laurent Talon, Yannick Peysson, Marc Fleury, Thibaud Chevalier, H. B. Ly, IFP Energies nouvelles (IFPEN), Fluides, automatique, systèmes thermiques (FAST), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)
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Fluid Flow and Transfer Processes ,Materials science ,Darcy's law ,Computational Mechanics ,Lattice Boltzmann methods ,Mechanics ,01 natural sciences ,010305 fluids & plasmas ,Volumetric flow rate ,Sphere packing ,Flow (mathematics) ,Modeling and Simulation ,0103 physical sciences ,[PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph] ,010306 general physics ,Porous medium ,Bingham plastic ,Pressure gradient - Abstract
International audience; In this work, we studied experimentally and numerically the pressure–flow rate relationship for yield stress fluids in porous media. We developed and validated 3D numerical simulations of the velocity field via a lattice Boltzmann method based on the TRT scheme, and a specific experimental setup allowing yield stress fluids to flow in a closed-loop system to obtain stable rheological properties over a wide range of flow rates (4 decades). The porous medium studied experimentally is a sandstone. The flow properties were also simulated on a regular sphere packing and a random sphere packing as well as on a 3D geometry of a sandstone obtained by x-ray tomography. These different geometries allow highlighting the role of the heterogeneity of the pore structure on the flow properties. All results are expressed as the flow rate ˜Q versus the difference of the pressure gradient to the critical pressure (Δ˜P−Δ˜Pc); Pc defines the pressure below which there is no flow. We observed both numerically and experimentally three specific scaling regimes, already identified by Talon and Bauer [Eur. Phys. J. E 36, 139 (2013)] for a Bingham fluid in 2D porous media. We also evidenced the existence of two critical pressures: the “true” critical pressure ˜Pc defined as the pressure below which there is no flow and the “pseudo” critical pressure threshold ˜P∞c determined by fitting the data in the high-flow-rate regime. We show that the “true” critical pressure is always lower than the “pseudo” one in heterogeneous porous media and can be equal only in the case of regular porous structures. We explain these observations using an energy minimization principle.
- Published
- 2019
16. Non-Darcy effects in fracture flows of a yield stress fluid
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A. Roustaei, Thibaud Chevalier, Laurent Talon, and Ian Frigaard
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Mechanical Engineering ,Computation ,Mechanics ,Condensed Matter Physics ,01 natural sciences ,Lubrication theory ,010305 fluids & plasmas ,Nonlinear system ,Flow (mathematics) ,Mechanics of Materials ,0103 physical sciences ,Fracture (geology) ,Range (statistics) ,010306 general physics ,Porous medium ,Pressure gradient ,Geology - Abstract
We study non-inertial flows of single-phase yield stress fluids along uneven/rough-walled channels, e.g. approximating a fracture, with two main objectives. First, we re-examine the usual approaches to providing a (nonlinear) Darcy-type flow law and show that significant errors arise due to self-selection of the flowing region/fouling of the walls. This is a new type of non-Darcy effect not previously explored in depth. Second, we study the details of flow as the limiting pressure gradient is approached, deriving approximate expressions for the limiting pressure gradient valid over a range of different geometries. Our approach is computational, solving the two-dimensional Stokes problem along the fracture, then upscaling. The computations also reveal interesting features of the flow for more complex fracture geometries, providing hints about how to extend Darcy-type approaches effectively.
- Published
- 2016
17. Diffusion of water in industrial cement and concrete
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Thibaud Chevalier, Guillaume Berthe, and Marc Fleury
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Materials science ,Magnetic Resonance Spectroscopy ,Construction Materials ,Relaxation (NMR) ,Biomedical Engineering ,Biophysics ,Water ,030218 nuclear medicine & medical imaging ,Magnetic field ,Diffusion ,03 medical and health sciences ,0302 clinical medicine ,Imaging, Three-Dimensional ,Deuterium ,Cylinder ,Radiology, Nuclear Medicine and imaging ,Diffusion (business) ,Composite material ,Porosity ,Porous medium ,Pulsed field gradient ,030217 neurology & neurosurgery - Abstract
We propose a deuterium diffusion tracer approach to measure diffusion coefficient in the case of very short NMR relaxation times, too short for NMR pulsed field gradient sequences (T1 or T2 below 1 ms). We also treat the case of porous media containing metallic fibers (such as reinforced concrete) strongly disturbing the magnetic field, and the case of inhomogeneous porous media containing large non porous granulates. For the latter, we propose a hollow geometry maximizing the investigated volume and minimizing the experimental time. The method is a 3D diffusion technique in which samples are immersed in deuterium and the water content inside the sample is monitored as a function of time. Water diffusing outside the sample with very long relaxation times can be subtracted either from T2 relaxation time distribution or not polarizing these components using a short repeat delay. Using analytical formulations describing the concentration of a tracer diffusing out of a cylinder or a hollow cylinder, we can calculate the corresponding pore diffusion coefficient.
- Published
- 2018
18. A Novel Experimental Approach for Accurate Evaluation of Chemical EOR Processes in Tight Reservoir Rocks
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Thibaud Chevalier, Eloise Chevallier, Julien Labaume, Max Chabert, and Serge Gautier
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Surface tension ,Materials science ,020401 chemical engineering ,Petroleum engineering ,Imbibition ,02 engineering and technology ,Wetting ,0204 chemical engineering ,Chemical eor ,010502 geochemistry & geophysics ,01 natural sciences ,0105 earth and related environmental sciences - Abstract
The sustained lower oil price for the last three years has shifted tight oil industry interest from an intensive drilling and completion based approach to more cost effective methods aimed at maximizing rates and ultimate recovery from existing wells. In that framework, application of conventional EOR methods to unconventional tight oil well has gained momentum in the recent period, with theoretical and experimental evaluation of approaches ranking from water and CO2 flooding to huff'n puff with chemicals. For that purpose, usual EOR experiments used for conventional rock cannot always be applied due to the extremely low volumes and permeability of tight reservoir rocks. This can lead to inaccurate results or extremely long experimental times. Here, we present a novel method for rapidly evaluating oil production by EOR methods in micro-Darcy permeability reservoir rock, and apply it to evaluate various chemical EOR approaches for unconventional tight oil wells. Our method relies on a fast screening and a continuous NMR monitoring of fluid saturations during imbibition experiments at reservoir temperature in miniaturized plugs. This permits to evaluate oil and water saturations in the rock samples as a function of time without having to interrupt the experiment for carrying out measurements. We validate this method by evaluating recovery from 10 μD sandstones and carbonates during imbibition of LowIFT formulations with various chemical additives. Despite the extremely low permeability, oil production from plugs using various chemicals can be evaluated and compared in less than 72 hours. Our new protocol shall be of interest to all laboratories trying to adapt EOR techniques to unconventional reservoirs, by permitting a real-time accurate and quantitative evaluation of various EOR options. In addition, the data we generated using various chemical EOR techniques support the interest of using low-IFT inspired chemical EOR methods to improve the ultimate recovery from tight reservoirs.
- Published
- 2018
19. Avalanches dynamics in reaction fronts in disordered flows
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Laurent Talon, Awadhesh K. Dubey, Thibaud Chevalier, Alberto Rosso, Severine Atis, Dominique Salin, Fluides, automatique, systèmes thermiques (FAST), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Théorique et Modèles Statistiques (LPTMS), and Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)
- Subjects
Physics ,[PHYS]Physics [physics] ,01 natural sciences ,010305 fluids & plasmas ,Universality (dynamical systems) ,Front propagation ,0103 physical sciences ,Front velocity ,Statistical physics ,Autocatalytic reaction ,010306 general physics ,Porous medium ,Nonlinear Sciences::Pattern Formation and Solitons ,ComputingMilieux_MISCELLANEOUS - Abstract
We report on numerical studies of avalanches of an autocatalytic reaction front in a porous medium. The front propagation is controlled by an adverse flow resulting in upstream, static, or downstream regimes. In an earlier study focusing on front shape, we identified three different universality classes associated with this system by following the front dynamics experimentally and numerically. Here, using numerical simulations in the vicinity of the second-order transition, we identify an avalanche dynamics characterized by power-law distributions of avalanche sizes, durations, and lateral extensions. The related exponents agree well with the quenched-Kardar-Parisi-Zhang theory, which describes the front dynamics. However, the geometry of the propagating front differs slightly from that of the theoretical one. We show that this discrepancy can be understood in terms of the nonquasistatic correction induced by the finite front velocity.
- Published
- 2017
20. A novel experimental approach for studying spontaneous imbibition processes with alkaline solutions
- Author
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V. M. Waeger, Aline Delbos, Thibaud Chevalier, T. Clemens, Marc Fleury, Julien Labaume, Bernard Bourbiaux, IFP Energies nouvelles (IFPEN), OMV [Vienne], and Society of Core Analysts
- Subjects
lcsh:GE1-350 ,Materials science ,Capillary action ,Kinetics ,02 engineering and technology ,010502 geochemistry & geophysics ,01 natural sciences ,Surface tension ,020401 chemical engineering ,Chemical engineering ,[CHIM]Chemical Sciences ,Imbibition ,Wetting ,0204 chemical engineering ,Diffusion (business) ,Oil field ,Saturation (chemistry) ,lcsh:Environmental sciences ,0105 earth and related environmental sciences - Abstract
International audience; Spontaneous imbibition processes can play an important role in oil production. It can be enhanced or influenced by wettability changes generated by properly designed chemicals or by the natural surfactants resulting from reactive crude oils in the presence of alkaline solutions. The reaction of basic salts with some components of oil can, indeed, lead to the formation of natural soaps that reduces the interfacial tension between oil and brine. The latter scenario is studied herein on samples and oil from the St Ulrich oil field in the Vienna basin. To that end, spontaneous imbibition experiments were performed with two brines differing by the absence or presence of alkali. We first present a general novel technique to monitor saturation changes on small rock samples for the purpose of assessing the efficiency of a given recovery process. Samples of only 15 mm in diameter and 20 mm in length and set at irreducible saturation were fully immersed in the solution of interest, and the evolution of the samples' saturation with time was monitored thanks to a dedicated NMR technique involving the quantification of the sole oil phase present within the sample. A fully-3D imbibition configuration was adopted, involving counter-current flows through all faces of the sample. The experimental method is fast for two reasons: (i) the kinetics of capillary imbibition process is proportional to the square of sample size, i.e. very rapid if accurate measurements can be acquired on tiny samples, (ii) the present 3D situation also involves faster kinetics than the 1D configuration often used. The NMR technique was crucial to achieve such conditions that cannot be satisfied with conventional volumetric methods. The kinetics of oil desaturation during spontaneous imbibition is interpreted with the help of an analytical 3D diffusion model. For the alkaline solution, the diffusion coefficient is reduced by a factor of only two compared to the non-alkaline brine, although the interfacial tension between the oil and the imbibing solution is reduced by a factor of 10. Hence, a wettability change to a more water wet state has to be assumed when the alkaline solution replaces the non-alkaline solution in the imbibition process. However, no significant impact on the final saturation was observed.
- Published
- 2019
21. Foam flows through a local constriction
- Author
-
Thibaud Chevalier, Mikko J. Alava, Antti Puisto, Christophe Raufaste, Stéphane Santucci, Natalia Shmakova, Juha Koivisto, Department of Applied Physics, RAS - Lavrentyev Institute of Hydrodynamics, Siberian Branch, Université Côte d'Azur, Aalto-yliopisto, and Aalto University
- Subjects
History ,Materials science ,0208 environmental biotechnology ,02 engineering and technology ,Mechanics ,021001 nanoscience & nanotechnology ,0210 nano-technology ,020801 environmental engineering ,Computer Science Applications ,Education ,Constriction - Abstract
We present an experimental study of the flow of a liquid foam, composed of a monolayer of millimetric bubbles, forced to invade an inhomogeneous medium at a constant flow rate. To model the simplest heterogeneous fracture medium, we use a Hele-Shaw cell consisting of two glass plates separated by a millimetric gap, with a local constriction. This single defect localized in the middle of the cell reduces locally its gap thickness, and thus its local permeability. We investigate here the influence of the geometrical property of the defect, specifically its height, on the average steady-state flow of the foam. In the frame of the flowing foam, we can observe a clear recirculation around the obstacle, characterized by a quadrupolar velocity field with a negative wake downstream the obstacle, which intensity evolves systematically with the obstacle height.
- Published
- 2017
22. Moving line model and avalanche statistics of Bingham fluid flow in porous media
- Author
-
Laurent Talon and Thibaud Chevalier
- Subjects
Physics ,Contact line ,Line model ,Biophysics ,Complex system ,Surfaces and Interfaces ,General Chemistry ,Mean field theory ,Critical point (thermodynamics) ,Statistics ,General Materials Science ,Statistical physics ,Porous medium ,Bingham plastic ,Scaling ,Biotechnology - Abstract
In this article, we propose a simple model to understand the critical behavior of path opening during flow of a yield stress fluid in porous media as numerically observed by Chevalier and Talon (2015). This model can be mapped to the problem of a contact line moving in an heterogeneous field. Close to the critical point, this line presents an avalanche dynamic where the front advances by a succession of waiting time and large burst events. These burst events are then related to the non-flowing (i.e. unyielded) areas. Remarkably, the statistics of these areas reproduce the same properties as in the direct numerical simulations. Furthermore, even if our exponents seem to be close to the mean field universal exponents, we report an unusual bump in the distribution which depends on the disorder. Finally, we identify a scaling invariance of the cluster spatial shape that is well fit, to first order, by a self-affine parabola.
- Published
- 2015
23. Publisher's Note: Generalization of Darcy's law for Bingham fluids in porous media: From flow-field statistics to the flow-rate regimes [Phys. Rev. E91, 023011 (2015)]
- Author
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Thibaud Chevalier and Laurent Talon
- Subjects
Darcy's law ,Generalization ,Statistical physics ,Porous medium ,Flow field ,Mathematics ,Volumetric flow rate - Published
- 2015
24. Generalization of Darcy's law for Bingham fluids in porous media: From flow-field statistics to the flow-rate regimes
- Author
-
Laurent Talon and Thibaud Chevalier
- Subjects
Pressure drop ,Darcy's law ,Thermodynamics ,Mechanics ,Critical value ,01 natural sciences ,Power law ,010305 fluids & plasmas ,Permeability (earth sciences) ,0103 physical sciences ,010306 general physics ,Bingham plastic ,Porous medium ,Pressure gradient ,Mathematics - Abstract
In this paper, we numerically investigate the statistical properties of the nonflowing areas of Bingham fluid in two-dimensional porous media. First, we demonstrate that the size probability distribution of the unyielded clusters follows a power-law decay with a large size cutoff. This cutoff is shown to diverge following a power law as the imposed pressure drop tends to a critical value. In addition, we observe that the exponents are almost identical for two different types of porous media. Finally, those scaling properties allow us to account for the quadratic relationship between the pressure gradient and velocity.
- Published
- 2015
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