HR: 0830h
AN: S11E-0349    [PDF]
TI: Differential Scattering Technique for Imaging of Open and Productive Fractures
AU: * Toteva, T D
EM: ttoteva@eas.gatech.edu
AF: Georgia Institute of Technology, 311 Ferst Dr., Atlanta, GA 30332 United States
AU: Long, L T
EM: tim.long@eas.gatech.edu
AF: Georgia Institute of Technology, 311 Ferst Dr., Atlanta, GA 30332 United States
AB: Scattered waves have been extensively used to characterize the heterogeneity and attenuation properties of the Earth's crust. Their sensitivity to Earth's discontinuities, like fractures in particular, makes them a potential tool for mapping fracture patterns and monitoring changes in their properties. We used an acoustic finite difference code to model the effect of small changes in the scattering coefficient for waves, traveling in a fractured medium. A small change is not easily seen on the seismogram, but this small change becomes obvious if one takes the difference in the seismograms. We are developing a technique to monitor changes in water productive fractures at shallow depth in crystalline rock. We utilize a repeatable seismic source to examine temporal variations in the response during periods of increased or decreased rate of pumping.
DE: 7205 Continental crust (1242)
SC: Seismology [S]
MN: 2003 Fall Meeting