Reference : Suction and time effects on the behaviour of a reservoir chalk
Scientific congresses and symposiums : Paper published in a book
Engineering, computing & technology : Civil engineering
http://hdl.handle.net/2268/480
Suction and time effects on the behaviour of a reservoir chalk
English
Priol, Grégoire [Ecole Nationale des Ponts et Chaussées > Institut Navier > CERMES > >]
De Gennaro, Vincenzo [Ecole Nationale des Ponts et Chaussées > Institut Navier > CERMES > >]
Delage, Pierre [Ecole Nationale des Ponts et Chaussées > Institut Navier > CERMES > >]
Collin, Frédéric mailto [Université de Liège - ULiège > Département Argenco : Secteur GEO3 > Géomécanique et géologie de l'ingénieur >]
Charlier, Robert [Université de Liège - ULiège > Département Argenco : Secteur GEO3 > Géomécanique et géologie de l'ingénieur >]
2006
EUROCK 2006 - Multiphysics Coupling and Long Term Behaviour in Rock Mechanics
Van Cotthem, Alain
Charlier, Robert mailto
Thimus, Jean-François
Taylor & Francis
519-526
Yes
No
International
0-415-41001-0
London
UK
EUROCK 2006
9 - 12 May 2006
Liège
Belgium
[en] Oil reservoir rocks contain various immiscible fluids (oil, water and gas) and they are submitted to elevated temperatures in the oilfield. Hence, they exhibit a typical coupled behaviour where multiphysics and coupled Thermo-Hydro-Mechanical aspects are predominant. This paper presents some results from researches carried out within the PASACHALK 2 European funded collaborative research. In this research dedicated to subsidence problems in the North sea Ekofisk oilfield, the behaviour of a reservoir chalk containing two immiscible fluids (an organic non polar fluid and water) is considered within the framework of the mechanics of unsaturated soils (no temperature effects considered). In order to account for the mechanical coupled effects related to the two pore fluids, the oil-water suction was considered as an independent stress variable. The paper presents some experimental results describing the combined effect of suction and time on the isotropic compression behaviour of the chalk. A viscoelastoplastic constitutive model based on one hand on the Barcelona BBM elastoplastic model for unsaturated and on the other hand on Perzina’s approach of viscous behaviour of soils is also presented and validated against experimental evidence.
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS
Researchers ; Professionals
http://hdl.handle.net/2268/480

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