Patent ID: 9476997
Filing Date: 2016-10-25
CPC Classification: G01V

Claim Text:
1. A method for locating diffractors in subsurface formations, comprising: a) actuating at least two seismic energy sources at spaced apart locations; b) detecting seismic energy in the subsurface formations resulting from actuation of the at least two sources; c) in a computer, processing signals corresponding to the detected seismic energy to remove components therein related to direct arrival of seismic energy from each source; d) in the computer, identifying arrival times of seismic energy in the processed signals corresponding to energy diffracted from at least one diffractor in the subsurface formations from each source; e) applying a plurality of values of time delay to the arrival times of the seismic energy corresponding to the energy diffracted from the at least one diffractor from the at least two sources to define a locus of points corresponding to the at least one diffractor; (f) in the computer, identifying an intersection of the locus of points corresponding to each source to locate the position of the at least one diffractor in a plane.