1. A method for building a depositional space ( 2 ) corresponding to a geological domain ( 1 ), comprising the steps of: partitioning said geological domain ( 1 ) with at least one conformal mesh ( 9 ) sensibly matching the boundaries ( 4 ) of said geological domain ( 1 ), calculating depositional coordinates defining a depositional space ( 2 ), wherein said depositional coordinates calculation comprises calculations of fields of displacement including simulations of mechanical deformations in the geological domain ( 1 ), using a solid material deformation model.