Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Land-reflection type
Patent
1980-08-08
1983-07-12
Moskowitz, Nelson
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Land-reflection type
367 36, 367 58, 364421, G01V 130
Patent
active
043934889
ABSTRACT:
The present invention provides for the accurate mapping of shallow crustal earth formations by means for refractive seismic waves to identify structure as well as elastic parameters of the strata undergoing survey to indicate deposits of ore, marker rock, economic minerals and the like. In one aspect of the present invention, a "roll-along" technique is used in the field, such technique being both practical and economical. In accordance with another aspect of the invention, there is a provision for (i) accurate separation and determination of seismic shear and compressional responses using three-dimensional hodographs; (ii) stacking displays that allow for accurate identification of shape of the surveyed strata; and (iii) final depth displays of the refracting bed segments associated with seismic shear and compressional wave velocities as well as Poisson's ratio to indicate presence of ore, marker rocks, economic minerals and the like.
REFERENCES:
patent: 2267858 (1941-12-01), Dix
patent: 2596463 (1952-05-01), Barthelmes
patent: 2658578 (1953-11-01), Oliphant
patent: 3302164 (1967-01-01), Waters et al.
Enescu, "Time Field and Hodographs of Seismic Waves Diffracted . . . ", 1965, pp. 113-119, Seria Geof., vol. 3, #1.
Barbu "Same Errors in . . . Hodographs", 1966, pp. 174-178, Petral. Si Gage, vol. 17, #4.
Vortanov et al., "The System of Algonthms . . . ", 1974, pp. 48-53, Razwed., Geofig., USSR.
Nazarny, "Determining . . . Hodographs of Reflected Waves", 1965, pp. 84-91, Prik. Geofiz., vol. 45.
Foster James I.
Gassaway Gary S.
Richgels Henry J.
Chevron Research Company
Keeling Edward J.
Messner H. D.
Moskowitz Nelson
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