Patent ID: 8531914
Filing Date: 2013-09-10
Classification: G01V

Abstract:
1. A method implemented by a computer for constructing an image representative of an acoustic impedance distribution in an area of subsoil using seismic measurements acquired from an emission of seismic waves from a top soil surface into the area of the subsoil and reception thereof by receivers positioned at different depths in at least one well, and from an estimation of a seismic wave propagation velocity field in the area of the subsoil, comprising: selecting with a computer illumination angles each corresponding to a direction of propagation of a wave front at a level of an upper limit of the area of the subsoil; organizing with a computer the seismic measurements into data organized by the illumination angles; determining with a computer by inversion, within the area of subsoil, the acoustic impedance distribution, wherein a difference between the data obtained from the seismic measurements and data resulting from the estimation is minimized by solving an equation of wave propagation of the velocity field, an acoustic impedance distribution and a pressure distribution at the level of the upper limit of the area of the subsoil for each illumination angle; and displaying the image.