Patent ID: 8868390

Claim:
A method for optimizing development of an underground medium containing fluids, from a flow model including a first grid forming a set of cells discretizing the medium, wherein production data and seismic data associated with a second grid are measured during the development of the medium with each cell of first grid containing a set of cells of the second grid, comprising: using a flow simulator implemented in software executed by a computer to simulate production data and pressure and saturation values in each cell of the first grid; assigning a pressure value to each cell of the second grid; assigning a saturation value to each cell in the second grid while carrying out for each cell of the first grid identifying zones of a set of connected cells of the second grid with each cell of identical lithofacies being a same rock type and determining, for each identified zone, a saturation value which is assigned to the cells of the zone by solving a first system of equations expressing a continuity of fluid flows between neighboring identified zones and a second system of equations expressing a conservation of a pore volume in each identified zone and a conservation of a volume of each fluid in the cells of the first grid; simulating seismic data in the second grid using pressure and saturation values associated with each cell of the second grid; and modifying the flow model to minimize a difference between the measured production data and the simulated production data and to minimize a difference between the measured seismic data and the simulated seismic data.