Modeling of super-dispersion in unsaturated porous media using NMR propagators

Fleury, Marc; Bauer, Daniela; Néel, Marie-Christine

doi:10.1016/j.micromeso.2014.07.035

Cited by 5 publications

(1 citation statement)

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“…However, oversimplified models are of limited accuracy, and idealized results can significantly deviate from real data. To strengthen the ability of NMR signal separation and interpretation, improvements of numerical simulation and experimental methodologies are needed (Hoop and Prange 2007;Mu et al 2007;Fleury et al 2015). Scaled-up numerical simulation for relaxation in pore network provides supplementary data for experimental observations, but its effectiveness relies on the full understanding of specific relaxation mechanisms due to divergent rock compositions and pore fluids, inserting appropriate controlling equations, and refining digital core reconstruction based on CT (computer tomography) images (Zhang and Zhang 2015;Wu et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Advances in low-field nuclear magnetic resonance (NMR) technologies applied for characterization of pore space inside rocks: a critical review

et al. 2020

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NMR serves as an important technique for probing rock pore space, such as pore structure characterization, fluid identification, and petrophysical property testing, due to the reusability of cores, convenience in sample processing, and time efficiency in laboratory tests. In practice, NMR signal collection is normally achieved through polarized nuclei relaxation which releases crucial relaxation messages for result interpretation. The impetus of this work is to help engineers and researchers with petroleum background obtain new insights into NMR principals and extend existing methodologies for characterization of unconventional formations. This article first gives a brief description of the development history of relaxation theories and models for porous media. Then, the widely used NMR techniques for characterizing petrophysical properties and pore structures are presented. Meanwhile, limitations and deficiencies of them are summarized. Finally, future work on improving these insufficiencies and approaches of enhancement applicability for NMR technologies are discussed.

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Section: Introductionmentioning

confidence: 99%

Advances in low-field nuclear magnetic resonance (NMR) technologies applied for characterization of pore space inside rocks: a critical review

et al. 2020

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Markov Random Fields and Random Walks

Korvin

2024

Earth and Environmental Sciences Library

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Random Walk Methods for Modeling Hydrodynamic Transport in Porous and Fractured Media from Pore to Reservoir Scale

et al. 2016

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International audienceRandom walk (RW) or Continuous Time Random Walk (CTRW) are recurring Monte Carlo methods used to model convective and diffusive transport in complex heterogeneous media. Many applications can be found, including fluid mechanic, hydrology, and chemical reactors modeling. These methods are easy to implement, very versatile and flexible enough to become appealing for many applications because they generally overlook of deeply simplify the building of explicit complex meshes required by deterministic methods. RW and CTRW provide a good physical understanding of the interactions between the space scales of het-erogeneities and the transport phenomena under consideration. In addition, they can result in efficient up-scaling methods, especially in context of flow and transport in fractured media. In the present study, we review the applications of RW or CTRW for several situations coping with various spatial scales, and different insights into up-scaling applications. RW and CTRW advantages and downsides are also discussed, thus providing a few avenues for further works and applications

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Modeling of super-dispersion in unsaturated porous media using NMR propagators

Cited by 5 publications

References 5 publications

Advances in low-field nuclear magnetic resonance (NMR) technologies applied for characterization of pore space inside rocks: a critical review

Advances in low-field nuclear magnetic resonance (NMR) technologies applied for characterization of pore space inside rocks: a critical review

Markov Random Fields and Random Walks

Random Walk Methods for Modeling Hydrodynamic Transport in Porous and Fractured Media from Pore to Reservoir Scale

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