Acoustics – Geophysical or subsurface exploration – Seismic source and detector
Patent
1986-08-13
1987-09-15
Jordan, Charles T.
Acoustics
Geophysical or subsurface exploration
Seismic source and detector
181112, 367 15, 367 20, 367154, G01V 100, G01V 138
Patent
active
046933360
ABSTRACT:
A method of marine seismic investigation involves positioning or deploying at a predetermined point close to or within a multi-element seismic source array a calibration source which is an acoustic pressure wave point source which has a far-field seismic signature of broad bandwidth. The radiated pressure wave field of the calibration source (3) is weaker than that of the main source (2). The two sources are fired at separate instants within a predetermined time range, preferably with the calibration source (3) being fired about two seconds before the main source (2). The reflected response of the sub-surface strata is recorded and processed to generate seismic data. In one embodiment, the response is recorded with two hydrophone arrays - a short high-resolution array (4) and a conventional main array (5). The method can be used to determine the far-field signature of the main source array (2). It can also be used to obtain a high-resolution shallow seismic section simultaneously with a deep seismic section. Apparatus suitable for the method is described, and also a method of conducting an underwater seismic survey.
REFERENCES:
patent: 3304533 (1967-02-01), Huckabay et al.
patent: 3379273 (1968-04-01), Chelminski
patent: 3491848 (1970-01-01), Giles
patent: 3744021 (1973-07-01), Todd
patent: 3864664 (1975-02-01), Trott et al.
patent: 4038630 (1977-07-01), Chelminski
patent: 4087780 (1978-05-01), Itria et al.
patent: 4326271 (1982-04-01), Ziolkowski
patent: 4357689 (1982-11-01), Ruehle
patent: 4382486 (1983-05-01), Ruehle
patent: 4476550 (1984-10-01), Ziolkowski et al.
patent: 4476553 (1984-10-01), Ziolkowski et al.
patent: 4486864 (1984-12-01), Ongkiehong et al.
patent: 4500978 (1985-02-01), Ziolkowski et al.
Newman, P. Watergun Fills Marine Seismic Gap, Oil and Gas Journal, Aug. 1978, pp. 138-150.
Horizon Exploration Limited
Jordan Charles T.
Steinberger Brian S.
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