Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Land-refraction type
Patent
1978-09-20
1980-11-04
Moskowitz, Nelson
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Land-refraction type
367 47, G01V 116
Patent
active
042323789
ABSTRACT:
We have found it possible to investigate subsurface formations in the expectation of locating promising gas fields by a unique refraction seismic technique. Basically one carries out a two-way seismic refraction profile for a fixed spread of geophones and explosions (or equivalent impulse sources) beyond the critical reflection range for shallow refractors, but still rather close to the spread. Then without moving the spread, reproducible records are also made for a two-way seismic refraction profile with the explosions or equivalent sources spaced as far away as convenient, so the refraction paths to the detector groups in the spread is up-going to the detectors for the maximum thickness of beds intervening between the refractor and the group of geophones.
REFERENCES:
Musgrave "Seismic Refraction Prospecting," 1967, pp. 85-118, Society of Exploration Geophysicists, Article by O'Brien.
McNabb, "Bright Spot Warping; It's Not Infallible," pp. 50-51, 8/26/74, The Oil and Gas Journal.
Grant et al., "Seismic Interpretation," 1965, pp. 153-155, Text-Interpretation Theory in Applied Geophysics.
Domenico, "Elastic Properties. . . Lead Reservoirs," 12/77, pp. 1339-1368, Geophysics, vol. 42, #7.
Ito et al., "Changes in Velocity and Attenuation . . . Transition," Dept. of Geophysics, Stanford University.
Werth, "Method for Calculating . . . Refraction Arrival," 1967, pp. 119-137, Seismic Refraction Prospecting.
"Interpretation of Crustal . . . Seismic Refraction Profiles," 1977, pp. 427-439, The Earths Crust, Monograph 20, Purdue U.
Adams Halbert E.
Cooper Edgar R.
Ford Lowell D.
Johnson Delbert C.
Warren Gregory L.
Dautremont James H.
Moskowitz Nelson
Standard Oil Company (Indiana)
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