Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Land-reflection type
Patent
1992-06-02
1993-07-06
Lobo, Ian J.
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Land-reflection type
367 41, G01V 136
Patent
active
052260186
ABSTRACT:
A geophysical prospecting method comprises injecting signal energy in the form of at least two pseudo-random pulse sequences of the complementary sequence type into an underground formation. Next, the signal energy is detected after it has been attenuated by passing through the underground formations in the form of response signals. The response signals are correlated with reference signals comprising at least two pseudo-random binary sequences to yield correlations. The correlations are summed so that the resultant signal which corresponds to the subsurface response signal does not have secondary lobes. The method is applicable to seismic prospecting and more particularly to cross-well seismic surveying. It is also applicable to acoustic prospecting for logging measurements. In a preferred embodiment, the pseudo-random sequences comprise a pair of Golay sequences.
REFERENCES:
patent: 3307648 (1967-03-01), Masterson
patent: 3873958 (1975-03-01), Whitehouse
patent: 4168485 (1979-09-01), Payton et al.
patent: 4326129 (1982-04-01), Neufeld
patent: 4607353 (1986-08-01), Muir
patent: 4743753 (1988-05-01), Cheng et al.
patent: 4780856 (1988-10-01), Becquey
patent: 4969129 (1990-11-01), Currie
"Complementary Sets of Sequences" by C. Tseng and C. Liu, IEEE Transactions Information Theory, 18/5, 644-52, 1972.
"Complementary Series" by M. Golay, IRE Transactions on Information Theory, 82-87, 1961.
Chang Chung
Froelich Benoit
Kimball Christopher V.
Lobo Ian J.
Pojunas Leonard W.
Schlumberger Technology Corporation
LandOfFree
Geophysical prospecting method using pseudo-random pulse sequenc does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Geophysical prospecting method using pseudo-random pulse sequenc, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Geophysical prospecting method using pseudo-random pulse sequenc will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1695247