NDLI: Drainage in a Rough Gouge-Filled Fracture

Content Provider	Springer Nature Link
Author	Auradou, H. Måløy, K. J. Schmittbuhl, J. Hansen, Alex
Copyright Year	2003
Abstract	We study experimentally and numerically slow drainage of a non-wetting fluid in a saturated fracture. Facing surfaces of the experimental fracture (25 cm × 25cm) are obtained from the casting of a brittle fracture of a granite block. They are rough but mated leading to a constant aperture where glass beads (1 mm) are spread in a single layer to mimic the influence of gouge particles trapped within the fracture. During injection, snap off might appear owing to the buoyancy difference between fluids, which splits the non-wetting invader into bubbles. Geometry and connectivity of this new fluid structure are characterized and shown to be significantly controlled by the long range spatial correlations of the fracture topography. Two coexisting types of sub structures emerge along percolating clusters: string-like links and compact blobs. Saturation and trapping are shown to be significantly influenced by the buoyancy effect. A numerical model to describe the experiments is introduced. It is based on an invasion percolation algorithm but includes spatially correlated contributions resulting from the roughness of the crack surfaces and gravity. Numerical results are shown to be consistent with experimental observations. The model allows us to extend the analysis to regimes where gravity forces are completely dominating and to obtain statistical results exploring numerous different fractures with the same properties (roughness statistics, pore size distribution, size). A description of the injection pressure evolution is proposed.
Starting Page	267
Ending Page	305
Page Count	39
File Format	PDF
ISSN	01693913
Journal	Transport in Porous Media
Volume Number	50
Issue Number	3
e-ISSN	15731634
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2003-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Industrial Chemistry/Chemical Engineering Hydrogeology Geotechnical Engineering Mechanics, Fluids, Thermodynamics Civil Engineering
Content Type	Text
Resource Type	Article
Subject	Catalysis

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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