METHOD FOR DETERMINING SEISMIC REFLECTION TRAVEL TIMES BASED ON THE INTERPRETATION OF MIGRATED CYLINDRICAL WAVE DATA

摘要

method for obtaining time by reflection from an interpretation of seismic data in migrated cylindrical waves.for a given value of the parameter defining the slope of these waves, or the superposition of such data associated with various lines of substantially parallel acquisition.this parameter may take several values.the method comprises the following steps: (a) defining a vector length (~) (p (x) in which the component in a direction parallel to the lines of development.defines the slope of the cylindrical wave; (b) to a position of a seismic receiver (x, r) on the abscissa line acquisition, the abscissa (.xi.) of the source, such as a beam on the seismic receiver and reflecting on an event point, is the source of the acquisition is considered.with a vector length (~), which the component from the direction parallel to the lines of development (p (x); and (c) determining a travel time (t (x, r)) by adding to the value of time trajet along said beam.a time equal to the product of the gradient (p (x) of the cylindrical wave, from the source; and (d) repeating steps (b) and (c) for all the positions of the receivers for which we want tothe result of du00e9migration; and (e) repeating the steps (a) to (d) for all the lines for which it is acquired as a result of du00e9migration and for all values of the parameterp (x). applications to the analysis of migration rate for the determination of the distribution of the speed of propagation of seismic waves in the subsoil, for example.