Method for exploiting a fractured medium on the basis of a matched reservoir model for wells chosen by means of an equivalent transmissivity model

A method for exploiting a fractured subterranean medium on the basis of a fractured reservoir model including a set of meshes discretizing said subterranean medium, said fractures being characterized by at least one fracture property, for which a range of variation of said property is defined, and said subterranean medium being passed through by at least two wells, and a method in which at least one equivalent transmissivity is determined for each well, characterized in that the following steps are performed:

• for each well an equivalent transmissivity model is constructed, linking said equivalent transmissivity to said fracture property;
• for each well an equivalent transmissivity spectrum is estimated by means of said equivalent transmissivity model and said range of variation of said fracture property;
• at least one well is chosen for which said determined equivalent transmissivity lies within said equivalent transmissivity spectrum;
• an initial fractured reservoir model is generated by means of said fracture property and said initial fractured reservoir model is matched by varying said property within said range of variation for each well chosen, so as to minimize a difference between the measured data and the data simulated by means of said fractured reservoir model and a flow simulator;
• and
• said subterranean medium is exploited according to an exploitation scheme defined on the basis of said matched fractured reservoir model.