A method for developing a computer-implemented geological model from previously collected seismic data, wherein it comprises steps of: - sampling said seismic data according to at least one set of seismic traces (3, 4) each formed of sampling points sampled at increasing depths, - analyzing the similarities between the seismic data around said sampling points belonging to different seismic traces (3, 4), - determining the links between sampling points belonging to different traces from said analysis of similarities, which links connect points that are located on the same geological surface, said determination comprising a step of calculating correlation images: - each correlation image corresponding to a pair of traces (3, 4), - each trace being represented according to a dimension of the correlation image, and - the value of each point of the image representing the local correlation of the seismic data in the vicinity of the two respective points of each trace (3, 4); wherein it comprises a step of: - forming said geological model by allocating to each sampling point a relative geological age, which is calculated at least from: (i) the relative geological age of other sampling points connected to said sampling point by links, and (ii) the relative geological age of other sampling points adjacent to the trace including said sampling point, the allocation of a relative geological age to the sampling points is an iterative process performed as long as there remain undated sampling points comprising at least one link, which comprises steps of: - selecting an undated sampling point comprising at least one link, - allocating a relative age to this point taking into consideration the already dated points of its trace, so that the age along a trace always varies in the same direction, and - allocating the same relative age to all the points connected to this point by links, and it also comprises a step of filling the geological model by propagation of a mini-surface by similarity in the vicinity of each sampling point comprising a link, taking said point as a seed. - sampling said seismic data according to at least one set of seismic traces (3, 4) each formed of sampling points sampled at increasing depths, - analyzing the similarities between the seismic data around said sampling points belonging to different seismic traces (3, 4), - determining the links between sampling points belonging to different traces from said analysis of similarities, which links connect points that are located on the same geological surface, said determination comprising a step of calculating correlation images: - each correlation image corresponding to a pair of traces (3, 4), - each trace being represented according to a dimension of the correlation image, and - the value of each point of the image representing the local correlation of the seismic data in the vicinity of the two respective points of each trace (3, 4); - forming said geological model by allocating to each sampling point a relative geological age, which is calculated at least from: (i) the relative geological age of other sampling points connected to said sampling point by links, and (ii) the relative geological age of other sampling points adjacent to the trace including said sampling point, (i) the relative geological age of other sampling points connected to said sampling point by links, and (ii) the relative geological age of other sampling points adjacent to the trace including said sampling point, - selecting an undated sampling point comprising at least one link, - allocating a relative age to this point taking into consideration the already dated points of its trace, so that the age along a trace always varies in the same direction, and - allocating the same relative age to all the points connected to this point by links, and it also comprises a step of filling the geological model by propagation of a mini-surface by similarity in the vicinity of each sampling point comprising a link, taking said point as a seed.