Overthrust imaging with tomo-datuming
Conference
·
OSTI ID:542955
The prestack datuming of 2-D seismic data containing both highly-variable near-surface velocities and rough topography can be accomplished using iterative turning ray tomography and prestack wave equation datuming (or tomo-datuming). In tomo-datuming, shot records are datumized from topography to a flat datum using velocities estimated from tomography. The main advantage of tomo-datuming over tomo-statics or refraction statics is that instead of a vertical time shift, tomo-datuming allows raypaths to project back to the origins, obeying the wave propagation principle (Snell`s law). As a result, stack sections utilizing tomo-datuming tend to have better reconstructed diffractions and reflections and therefore, better imaging after migration. This is demonstrated with an overthrust line across the Union Pacific Railroad (UPRR) Land Grant in Wyoming.
- OSTI ID:
- 542955
- Report Number(s):
- CONF-951013--
- Country of Publication:
- United States
- Language:
- English
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