Patent ID: 6747914
Filing Date: 2004-06-08
Classification: G01V

Abstract:
A system for seismic data acquisition in an earth formation composing:(a) at least one well borehole in an earth formation, said at least one well borehole containing a column of borehole fluid; (b) a plurality of axially spaced apart discontinuities associated with said at least one well borehole, each of said spaced apart discontinuities radiating a seismic wavefield into the earth formation in response to propagating tube waves in the well borehole fluid, said plurality of discontinuities producing a composite wavefield in response to said propagating tube waves; (c) at least one detector for receiving signals indicative of said composite wavefield traversing the earth formation; and (d) an acoustic sensor associated with at least one of said discontinuities for providing a signal indicative of a coda of said at least one discontinuity.