Method for obtaining commuting times of reflection from an interpretation of the data su00ecsmicos wavelength cilu00ecndrica migrada

摘要

Method for obtaining commuting times of reflection from an interpretation of the data su00ecsmicos wavelength cilu00ecndrica migrada ".Method for obtaining commuting times of reflection from an interpretation of seismic data in cylindrical waves migrated.For a given value of the parameter defining the slope of these waves, or the superposition of these data associated with multiple rows of substantially parallel acquisition, this parameter.Possibly, taking different values successively.The method comprises the following steps: a) definition of a vector of slowness ( sym ) whose component (PX) in a direction parallel to the lines of the acquisition, defines the slope of the cylindrical wave; (b)For a given position of a seismic receiver of abscissa (x ~ R ~) in a line of purchase, demand of abscissa ( sym ) of the source.So that a ray starting from seismic receiver and reflecting in an event captured from the source on the line acquisition considered,With a vector of slowness ( sym ) whose component in the direction parallel to the lines of the acquisition is (- P ~ x ~); c) determining a travel time (T ^ and ^ (x ~ R ~)) by adding the value of the timeThe displacement along the radius of a time equal to the product of inclination (P ~ x ~) of cylindrical wave by the abscissa of point source; (d) the repetition of stages (b) and (c) for all positions of the receiver andS to which a result of demigrau00e7u00e3o is sought; and (E) the repetition of steps a) to d) for all lines of acquisition for which a result of demigrau00e7u00e3o is wanted, and for all VALaw taken by parameter (P ~ x ~). Applications: analysis of speed of demigrau00e7u00e3o for determining the distribution of speeds of propagation of seismic waves in the subsoil, for example.