A5042551814- NMR spectroscopy and applications
- Hydrocarbon exploration and reservoir analysis
- CO2 Sequestration and Geologic Interactions
- Enhanced Oil Recovery Techniques
- Hydraulic Fracturing and Reservoir Analysis
- Geophysical and Geoelectrical Methods
- Groundwater flow and contamination studies
- Soil and Unsaturated Flow
- Advanced NMR Techniques and Applications
- Seismic Imaging and Inversion Techniques
- Methane Hydrates and Related Phenomena
- Advanced MRI Techniques and Applications
- Advanced Neuroimaging Techniques and Applications
- Geothermal Energy Systems and Applications
- Petroleum Processing and Analysis
- Rock Mechanics and Modeling
- Clay minerals and soil interactions
- Drilling and Well Engineering
- Oceanographic and Atmospheric Processes
- Fluid Dynamics and Turbulent Flows
- Orbital Angular Momentum in Optics
- Asphalt Pavement Performance Evaluation
- Reservoir Engineering and Simulation Methods
- Geological formations and processes
- Ocean Waves and Remote Sensing
IFP Énergies nouvelles
2015-2024
Université d'Avignon et des Pays de Vaucluse
2013
Institut Français
2001-2011
École Polytechnique
1995-2003
Centre National de la Recherche Scientifique
2002-2003
Laboratoire de physique de la matière condensée
2002
CEA LETI
2001
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2001
Institut Français de Bioinformatique
2001
Gibaud (France)
2001
Proton nuclear spin-relaxation studies on water- or oil-saturated granular packings and limestone rocks allow estimating surface molecular dynamical parameters. Measurements were performed at various conditions of temperature, magnetic field strengths, pore size. We show by low NMR relaxation that changing the amount paramagnetic impurities leads to striking different pore-size dependences times T1 T2 liquids in pores. These are well supported surface-limited diffusion-limited models....
We show that simple low-field nuclear magnetic resonance (NMR) can provide quantitative measurements of water content in clays providing appropriate instrumentation and protocols. In particular, NMR is a good tool to study the swelling smectites interlayer despite pore sizes order or less than 1 nm presence paramagnetic impurities yielding short T1 T2 relaxation times. The performed at field 0.5 T were: (i) standard CPMG sequence deduce distribution transverse times T2, (ii) 2D T1–T2 analyze...
Standard reservoir evaluations are based on Archie's law relating the average water saturation to electrical resistivity by R(ind) = S(w)(-2). However, especially in case of complex heterogeneous carbonates, deviation from is observed and generally attributed factors affecting percolation or disconnectedness different phases (wetting films, microporosity, macropores) assuring conductance. Pore-network models (PNM's) combination with high-resolution computed microtomography (μ-CT) constitute...
We experimentally study the electrical transport in partially water-saturated pore network. The porous medium under investigation is a Fontainebleau sandstone, characterized by x-ray tomography. show existence of two conductivity regimes. At high water saturation, electric resistivity follows well-known Archie law. Below saturation S_{w} approximately 0.2 , strong negative deviation from this law observed. attribute transition to "a thick liquid film," assuring ionic conduction low regime. A...
If they are to be economically and technically sustainable, geothermal projects require the production of hot fluid at high flow rates over a 30-year thermal lifetime. The combined use multiple logging tools in making petrophysical assessments reservoir quality helps optimize drilling areas potential. present paper focuses on four wells intercepting Middle Jurassic (Dogger) carbonate rocks Paris Basin where for first time Nuclear Magnetic Resonance (NMR) log data have been successfully used...
We present nuclear spin-relaxation experiments, at various temperatures and Larmor frequencies for water oil confined in a series of calibrated porous media natural rocks. The temperature frequency dependencies the longitudinal spin relaxation rates 1/T1 are interpreted with an original model surface diffusion taking into account solid−liquid interactions pore surface. Depending strength such interactions, one observes anomalous dependence transverse 1/T2 silica sandstones normal behavior...
Experiments and three-dimensional numerical simulations of yield stress fluids in heterogeneous porous media show that, as a result this disorder, the fluid flows through single channel near critical pressure. Beyond number open channels increases with pressure applied.
The mechanism behind the 1H nuclear magnetic resonance (NMR) frequency dependence of T1 and viscosity T2 for polydisperse polymers bitumen remains elusive. We elucidate matter through NMR relaxation measurements over an extended range frequencies (f0 = 0.01–400 MHz) viscosities (η 385–102 000 cP) using in static fields, field-cycling relaxometry, T1ρ rotating frame. account anomalous behavior log-mean times T1LM ∝ f0 T2LM (η/T)−1/2 with a phenomenological model 1H–1H dipole–dipole...
Nuclear-magnetic-resonance (NMR) diffusion simulations were performed numerically in unconsolidated and consolidated porous media. The curve of the apparent coefficient as a function time was found to be poor indicator pore structure. Various representations tried gather data. A successful one uses combination surface-to-volume ratio, formation factor, permeability; it can used different ways order derive these parameters from NMR measurements.
Canadian oil sands represent a huge resource. Stable water-in-oil (W/O) emulsions, which persist in Athabasca from surface mining, are problematic, because of clay solids. This article focuses on the characterization water-in-diluted-bitumen emulsions by nuclear magnetic resonance (NMR) measurement and transient behavior undergoing phase separation. An NMR restricted diffusion experiment (pulsed gradient spin−echo (PGSE)) can be used to measure emulsion drop-size distribution. Experimental...
The objectives of the Geocarbone-Integrity program are to develop techniques, methodologies and knowledge concerning long term confinement CO2 in geological storage. Linked other French programs such as Geocarbone Injectivity or Picoref, it is an integrated approach involving geochemistry, petrophysics, geology geomechanics. Different scales must be considered order describe caprocks: from pore grain scale petrophysics regional focused on a specific site Paris basin but developed general can...
Direct estimates of vertical heat flux were computed using data collected with a towed vehicle that carried collocated velocity and temperature sensors. Horizontal wavenumbers from about 1 to 40 cpm resolved, which excludes some potentially significant contribution lower wavenumbers. The correlation coefficient w θ is 0.1 0.2 statistically significant. authors compared the cospectra obtained three regions: (i) well-defined turbulent interface at 400 m depth being overturned, (ii) sporadic...
The NMR propagator technique allows the measurements of variance ${\ensuremath{\sigma}}^{2}=\ensuremath{\langle}{(\ensuremath{\xi}\ensuremath{-}\ensuremath{\langle}\ensuremath{\xi}\ensuremath{\rangle})}^{2}\ensuremath{\rangle}$ displacements as a function time $t$ when flowing in porous media. dependence \ensuremath{\sigma} is very sensitive test Gaussian behavior compared to analysis shape propagators. Superdispersion occurs...