Tomographic Determination of Interval Velocities from Picked Seismic Data-Theory and Synthetic Results
, by Chuck Sword
The method of Controlled Directional Reception (CDR) can be used to determine travel times and ray parameters of waves transmitted from a given shot
and received at a given geophone (Riabinkin et al., 1962; Sword, 1984).
These ray and travel-time parameters (collectively known as CDR parameters) are obtained from conventional seismic data through an automated picking procedure,
and can be inverted tomographically to give the velocity structure of the medium. No assumptions are made as to the shape or continuity of the reflecting
horizons. The inversion process has been successfully tested on synthetic data from a laterally heterogeneous model with curved, dipping reflectors.
STANFORD