Institut Francais Du Pe'trole

Yu Didier Ding

Daniel Longeron

Annie Audibert Hayet

Gérard Renard

The method essentially comprises acquiring initial data obtained by laboratory measurements of the values, according to the initial permeability of the formations surrounding the well, of the thickness of the cakes and of the damaged permeability and restored permeability values of this zone, as a function of the distance to the wall of the well. Then the damaged zone is discretized by a 3D cylindrical grid pattern forming blocks of small radial thickness in relation to the diameter of the well, and the diffusivity equation, modelling the flow of the fluids through the cakes, is solved in this grid pattern by taking account of the measured initial data. Finally, the evolution of the permeability is modelled as a function of the flow rates of fluids flowing through the cakes, so as to deduce therefrom the optimum conditions to be applied for producing the well.

Method of determining by numerical simulation the restoration conditions, by the fluids of a reservoir, of a complex well damaged by drilling operations

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Chatou, France

Yu Didier Ding