Elastic measurements in rock formations

Datta, S.

doi:10.1016/0016-7142(67)90020-8

Cited by 8 publications

(1 citation statement)

References 10 publications

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“…I. The equipment was earlier designed and constructed for the studies on absorption (Datta, 1968) and elastic parameters (Datta, 1967) in rock specimens. It was afterwards modified for the measurements in model seismology.…”

Section: Electronic Equipmentmentioning

confidence: 99%

Head Waves in Two‐dimensional Seismic Models*

Datta

Bhowmick

1969

Geophysical Prospecting

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Studies made on head waves in a large number of two-dimensional horizontal and inclined layer seismic models are described. The assumption that the amplitude of head wave decreases exponentially with distance is found to be valid in horizontal layers. For the correct estimation of the head wave decay coefficient, the decrease of amplitude due to the divergence of wave energy should always be considered.The variations of head wave amplitude at large distances from the source appear to follow the theory of Heelan (1953). It is, however, concluded that the theory can only be verified from the measurements in models which have large velocity contrast and thick layer at the top.A prominent interference phenomenon between the direct and head wave has been observed near the critical distance. This is more marked for up-dip profile in the case of inclined layer models. The rate of head wave amplitude decrease with distance beyond the zone of interference is found to depend on dip angle, direction of the dip, and velocity contrast.

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Section: Electronic Equipmentmentioning

confidence: 99%