Communications: electrical – Selective – Having electron beam device
Patent
1975-09-12
1977-09-13
Moskowitz, Nelson
Communications: electrical
Selective
Having electron beam device
340 155MC, 181108, G01V 116, G01V 120
Patent
active
040486125
ABSTRACT:
In areal seismic exploration, seismic impulses are generated successively at locations spaced along a centrally located, asymmetic sawtooth shot-point line which regularly crosses a median line coincident with the line of survey. Seismic waves resulting from each impulse are detected at at least a pair of detector spreads each parallel to the median line, but offset from each other a distance equal to an integral multiple of the vertical offset of the shot-point line. Preferably the detected signals are summed on a cross-steered basis, such that the resulting traces associated with crossed sets of centerpoints normal to the survey line provide directional ("dip") information to better indicate areal subsurface structure. Additionally, the dectected signal can be stacked on a common depth point bases (CDPS).
REFERENCES:
patent: 3529282 (1970-09-01), Brown et al.
patent: 3597727 (1971-08-01), Judson et al.
patent: 3691529 (1972-09-01), Pizante
patent: 3806863 (1974-04-01), Tilley et al.
patent: 3867713 (1975-02-01), Tegland et al.
patent: 3921124 (1975-11-01), Payton
Chevron Research Company
Freeland, Jr. R. L.
Messner H. D.
Moskowitz Nelson
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