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WAVE‐FRONT DIAGRAMS FROM UPHOLE SHOOTING*
- Source: Geophysical Prospecting, Volume 9, Issue 4, Oct 1961, p. 533 - 543
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- 27 Apr 2006
Abstract
Abstract
Uphole shooting during a reflection or refraction survey provides additional information about the velocities within the weathered layer if recorded with a complete spread of geophones on the surface. Wave‐front diagrams can be constructed which give a genuine picture of the wave paths in the subsurface. Their construction is based on the assumption that the travel time from a shot in the hole to a geophone on the surface is the same as that from a fictitious shot on the surface to a fictitious geophone in the subsurface.