Reference : Mechanical behaviour of chalk reservoirs: numerical modelling of water sensitivity effects
Scientific congresses and symposiums : Unpublished conference
Engineering, computing & technology : Civil engineering
http://hdl.handle.net/2268/17085
Mechanical behaviour of chalk reservoirs: numerical modelling of water sensitivity effects
English
Collin, Frédéric mailto [Université de Liège - ULg > Département Argenco : Secteur GEO3 > Géomécanique et géologie de l'ingénieur >]
Cui, Yu mailto [Ecole Nationale des Ponts et Chaussées - ENPC > Institut Navier > CERMES > >]
Schroeder, Christian mailto [Université de Liège - ULg > Département Argenco : Secteur GEO3 > Géomécanique et géologie de l'ingénieur >]
Charlier, Robert mailto [Université de Liège - ULg > Département Argenco : Secteur GEO3 > Géomécanique et géologie de l'ingénieur >]
2003
6
No
No
International
GeoProc 2003
du 13 au 15 octobre 2003
Royal Institute of Technology
Stockholm
Suède
[en] Chalk is the constituent material of numerous oil reservoirs in North Sea. The mechanical behaviour of a saturated chalk has been largely studied. However, different aspects of its behaviour are not yet well understood: material characteristics depend on the saturating fluids and chalk response is time-dependent. This paper proposes the PASACHALK numerical model: an elasto-plastic constitutive law is presented, which reproduces the different plastic mechanisms of the chalk (pore collapse and shear failure) and the influence of pore fluids. The water sensitivity of this soft rock is explained by the existence of suction effects in chalk. Finally, a simulation of a hypothetical reservoir is proposed to show the response of the elasto-plastic model during depletion phase and water injection phase.
Researchers ; Professionals
http://hdl.handle.net/2268/17085

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