1. Method for developing a geological model from previously collected seismic data, the method comprising the steps of: sampling seismic data according to at least one set of seismic traces, each trace being comprised of sampling points sampled according to increasing depths, the traces further having a substantially vertical orientation and being comprised of substantially equidistant sampling points; analyzing similarities between the seismic data around said sampling points belonging to different seismic traces; determining connections between sampling points belonging to different traces on a basis of analysis of said similarities, the connections connecting sampling points located substantially on same geological surface; and forming said geological model attributing to each sampling point a relative geological age, being calculated at least on a basis of: (i) relative geological age of other sampling points connected to said each sampling point by connections; and (ii) relative geological age of other sampling points in a vicinity of a trace corresponding to said each sampling point.