Patent ID: 6032104
Filing Date: 2000-02-29
Classification: G01V

Abstract:
Method of processing seismic signals for moveout analysis, comprising the steps of:a--transmitting acoustic waves into a medium from at least one transmission source,b--receiving, on receivers, waves reflected in the medium and recording the waves in the form of seismic traces, each seismic trace being at least labelled by an offset (h) and a midpoint (X.sub.0) which are tied to the source/receiver pair which generated the seismic trace, two consecutive midpoints (X.sub.0) for the same offset h being separated by a constant gap .DELTA.x,c--defining a string of N integer indices j lying between two limits (j.sub.min, j.sub.max) and representative of the moveouts of at least one predetermined gather of traces,d--calculating a focus depth time t.sub.p for each value of j,e--defining a string of P integer numbers u determining an interval (P-1).DELTA.x,f--copying, for each value of j, each trace identified by its parameters X.sub.0 and h, as many times as there are integer numbers u in the interval (P-1).DELTA.x,g--applying at least one static correction (dt), DMO PSCAN, to each of the copied traces, dependent at least on the parameters j, h and u .DELTA.x,h--repeating steps f and g for all values of X.sub.0 and of j.