[en] Subsidence of chalk oil reservoirs in North Sea is related to the chalk compaction induced by fluid depletion and by the water – chalk interaction. A constitutive model is developed in order to take into account these two effects. It is based on frictional – cap elastoplasticity and on the Barcelona unsaturated soil model. Oil – water – chalk interaction is modeled through the suction variable. The two saturating fluids flow is also developed. After implementation into a finite element code, these tools allow to simulate a waterflooding experiment on a chalk sample. The model appears to reproduce qualitatively and quantitatively the experimental results.
Disciplines :
Civil engineering
Author, co-author :
Charlier, Robert ; Université de Liège - ULiège > Département Argenco : Secteur GEO3 > Géomécanique et géologie de l'ingénieur
Collin, Frédéric ; Université de Liège - ULiège > Département Argenco : Secteur GEO3 > Géomécanique et géologie de l'ingénieur
Schroeder, Christian ; Université de Liège - ULiège > Département Argenco : Secteur GEO3 > Géomécanique et géologie de l'ingénieur
Illing, Pierre ; Université de Liège - ULiège > Département Argenco : Secteur GEO3 > Géomécanique et géologie de l'ingénieur
Delage, Pierre; Ecole Nationale des Ponts et Chaussées > Institut Navier > CERMES
Cui, Yu Jun; Ecole Nationale des Ponts et Chaussées > Institut Navier > CERMES
De Gennaro, Vincenzo; Ecole Nationale des Ponts et Chaussées > Institut Navier > CERMES
Language :
English
Title :
A constitutive model for North Sea Chalk. Application to reservoir compaction and to waterflooding
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