Title :

Multi-scale pore structure of COx claystone: Towards the prediction of fluid transport

Author(s) :

Song, Yang [Auteur]
Centrale Lille
Laboratoire de Mécanique de Lille - FRE 3723 [LML]
Davy, Catherine [Auteur]
Centrale Lille
Laboratoire de Mécanique de Lille - FRE 3723 [LML]
Troadec, David [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Blanchenet, Anne-Marie [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Skoczylas, Frédéric [Auteur]
Centrale Lille
Laboratoire de Mécanique de Lille - FRE 3723 [LML]
Talandier, Jean [Auteur]
Agence Nationale pour la Gestion des Déchets Radioactifs [ANDRA]
Robinet, Jean-Charles [Auteur]
Agence Nationale pour la Gestion des Déchets Radioactifs [ANDRA]

Journal title :

Marine and Petroleum Geology

Pages :

63-82

Publisher :

Elsevier

Publication date :

2015-08

ISSN :

0264-8172

English keyword(s) :

Claystone
Focused Ion Beam/Scanning Electron Microscopy (FIB/SEM)
Transmission Electron Microscopy (TEM)
Image analysis
Pore size distribution
Liquid permeability

HAL domain(s) :

Sciences de l'ingénieur [physics]

English abstract : [en]

We aim to relate the morphology of the pore network of finely porous claystones to their fluid transport properties. By using Focused Ion Beam in combination with Scanning Electron Microscopy (FIB/SEM), we image the pore ...
Show more >We aim to relate the morphology of the pore network of finely porous claystones to their fluid transport properties. By using Focused Ion Beam in combination with Scanning Electron Microscopy (FIB/SEM), we image the pore network of COx claystone from 2D image stacks and as 3D reconstructed volumes. Our FIB/SEM samples are representative of the mesoscopic matrix clay. Porosity resolvable by this technique is in the range 1.7–5.9% with peak pore sizes of 50–90 nm. 3D pore network skeletonization provides connected pore volumes between end surfaces, tortuosity, density, and shortest pore paths with their pore size distribution. At higher resolution, 2D transmission electron microscopy (TEM) reveals large amounts of smaller pores (2–20 nm) between clay aggregates, associated to a local porosity of 14–25%, and peak sizes of 4–6 nm. Liquid permeability predictions with Katz–Thompson model, at the FIB/SEM volume scale and at the TEM surface scale, are in good agreement with macroscopic measurements (on the order of 10−20 m2), showing that both mesopore sizes (peaks at 50–90 nm and 4–6 nm), located within the clay matrix, contribute to liquid transport.Show less >

Language :

Anglais

Popular science :

Non

Collections :

• Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL