Abstract: A method for estimating fluid volumes moved in compartmented areas of the subsoil, the method including the steps of a) performing a series of gradiometric measurement campaigns at pre-established time intervals in a survey field, in which the relative variation ?Vi of the fluid volumes contained in a corresponding compartmented area of the subsoil is known; b) determining, for each measurement campaign after the first campaign, a parameter P1i based on the entire survey area; and c) determining a variability law that correlates the parameter P1i to the known relative variation ?Vi in fluid volumes in the compartmented area of the subsoil.

Abstract: The present invention relates to a method for estimating fluid volumes moved in compartmented areas of the subsoil, including steps which consist in effecting, in a survey field, a series of gradiometric measurement campaigns “for framing/calibrating the area” at pre-established time intervals, for each of which the relative variation ?Vi of the fluid volumes contained in a corresponding compartmented area of the subsoil is known; on the basis of the measurement effected, to calculate, for each measurement campaign “for framing/calibrating the area” subsequent to the former one, a parameter Pu correlated to the whole investigation area; on the basis of the known fluid volume variations ?Vi and the relative calculated parameter P1i, to determine by approximation a variability law which relates the parameter Pu with the volume variation of the fluids in the compartmented area, associated with any measurement campaign subsequent to those for framing/calibrating the area on the basis of the variability law determ

Abstract: Method for the continuous up-dating of a bidimensional and tridimensional seismic image in depth in real time during the drilling of a well by using seismic velocity information comprising the initial definition of a velocity model and the subsequent re-iterative modification of this initial velocity model by integrating the geophysical data taken on the surface with the geological domain of the subsurface data obtained directly during the drilling of the well.