ORBi: Guiducci Chiara - Hydro-mechanical behavior of fractures: 2D, F.E.M. modeling

Reference : Hydro-mechanical behavior of fractures: 2D, F.E.M. modeling


	Document type :	Scientific congresses and symposiums : Paper published in a book
	Discipline(s) :	Engineering, computing & technology : Civil engineering
	To cite this reference:	http://hdl.handle.net/2268/488

Title :	Hydro-mechanical behavior of fractures: 2D, F.E.M. modeling
Language :	English
Author, co-author :	Guiducci, Chiara [Scuola Normale Superiore di Pisa > > > >]
	Pellegrino, Antonio [ENI > Agip division > > >]
	Radu, Jean-Pol [Université de Liège - ULg > Département Argenco : Secteur GEO3 > Géomécanique et géologie de l'ingénieur >]
	Collin, Frédéric [Université de Liège - ULg > Département Argenco : Secteur GEO3 > Géomécanique et géologie de l'ingénieur >]
	Charlier, Robert [Université de Liège - ULg > Département Argenco : Secteur GEO3 > Géomécanique et géologie de l'ingénieur >]
Publication date :	2002
Main document title :	Poromechanics II
Author, co-author :	Auriault, J. L.
	Geindreau, C.
	Royer, P.
Publisher :	Balkema
Pages :	217-223
On invitation :	No
Audience :	International
ISBN :	90-5809-394-8
City :	Lisse
Country :	The Netherlands
Event name :	2nd Biot Conference on Poromechanics
Event date :	26-28 august 2002
Event place (city) :	Grenoble
Event country :	France
Abstract :	[en] A numerical approach for modeling the coupled hydro-mechanical fracture behavior is proposed. The movement of fluids through rock fractures and consequently the evolution of their hydraulic conductivity is an important subject in many petroleum related activities, mainly concerning the change of well productivity during the reservoir life. It is well known that the flow in the fractures is strongly controlled by the fracture apertures. Recent investigations on the distribution of the apertures in natural fractures suggest that the cubic law can, better than the Darcy law, predict the fluid flux through rough walled fractures as long as the appropriate average fracture aperture is used. A finite element code is developed to predict the influence that the stresses variation in the fracture has on the distributed hydraulic conductivity field. The proposed model combines the stochastic cubic law with a non-linear deformation function (hyperbolic) that is suggested to describe the stress-closure/opening curves of the joints and that allows to couple together the hydraulic and the mechanic fracture behavior. The relationships used and the validity of the present model are tested by means of the comparison between experimental data and numerical predictions (Bart 2000) in various bound-ary and loading conditions. Comparisons between the proposed new model and a no coupled one have also been performed. They show that the proposed coupled model allows for a more realistic description of the fracture behavior.
Target :	Researchers ; Professionals
Permalink :	http://hdl.handle.net/2268/488

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