Patent ID: 6161076
Filing Date: 2000-12-12
Classification: G01V,G06F

Abstract:
A method of conducting n seismic surveys simultaneously at substantially the same location where n is a whole number greater than one comprising:(a) simultaneously transmitting with n vibratory sources, associated groundforce signals into the earth, each said groundforce signal including a reference signal and non-linear noise, each said reference signal having a temporal duration;(b) recording with a first recording apparatuses n groundforce signals;(c) generating n filters for converting each said groundforce signal to a short-duration wavelet;(d) recording with a second recording apparatus at least one reflection signal from a location within the earth of said plurality of groundforce signals;(e) repeating steps (a)-(d) n times, varying an initial phase of each said groundforce signal among n initial phases to give n variations of the at least one reflected signal;(f) applying the filters associated with a selected vibratory source to the n variations of the at least one reflected signals to give n filtered signals corresponding to the selected vibratory source; and(f) stacking the n filtered signals to give a recovered reflection signal associated with the selected vibratory source.