Method for updating a geological reservoir model by means of dynamic data

A method for updating a geological reservoir model representative of the behavior of a heterogeneous porous medium and discretized in space into a set of cells forming a grid representative of structure of the medium, allowing accounting for dynamic data acquired by measurements and varying in time according to fluid flows in the medium, the method comprising:

• A) constructing an initial map of petrophysical properties by means of a geostatistical simulator and of static data;
• and
• B) integrating the dynamic data (DD) by optimizing the initial map by carrying out:
• a) constructing an initial set of gradual pilot points;
• b) constructing at least one complementary set of gradual pilot points;
• c) constructing a combined set of gradual pilot points by combining the sets of gradual pilot points according to a gradual deformation method wherein at least one deformation parameter is a characteristic parameter of the pilot points;
• d) modifying values of petrophysical properties of the initial map by constraint by the combined set of gradual pilot points and by the static data;
• e) modifying the combined set and resuming from c) until a stop criterion is reached;
• and
• C) updating the geological reservoir model by associating the map optimized in B) with the grid of the model.