Communications – electrical: acoustic wave systems and devices – Signal transducers – Vibrator-type transmitter
Patent
1987-01-07
1988-02-02
Kyle, Deborah L.
Communications, electrical: acoustic wave systems and devices
Signal transducers
Vibrator-type transmitter
367190, 367 56, 181108, 181111, 364421, 73662, G01V 124, G01V 136
Patent
active
047232315
ABSTRACT:
A method of reducing Rayleigh waves (ground roll) in land seismic exploration employs a unique combination of amplitude output from and spacing of the vibrator sources making up a land seismic exploration system. The velocity of the Rayleigh wave for the prospect to be explored is determined. At least one receiver is used and is spaced from the vibrator sources a distance sufficient to establish the receiver as being in the far-field. The output of each of the vibrator sources is locked in phase and frequency and known separations between the vibrator sources are maintained. The frequency is varied and the individual output amplitude of each vibrator source is varied at each frequency so that the resultant Rayleigh waves traverse the known separations resulting in out-of-phase Rayleigh waves between the sources. The proper selection of output amplitude and separation provides for reduction in the Rayleigh wave that is ultimately transmitted to the receiver by essentially adjusting the out-of-phase results to minimize the Rayleigh waves transmitted to the receiver. The source outputs must be of an amplitude high enough to provide sufficient downward energy for exploration.
REFERENCES:
patent: 2642146 (1953-06-01), Woods
patent: 2657373 (1953-10-01), Piety
patent: 3550073 (1970-12-01), Foster et al.
patent: 3698508 (1972-10-01), Landrum, Jr.
patent: 3761874 (1973-09-01), Landrum
patent: 3984805 (1976-10-01), Silverman
patent: 4014403 (1977-03-01), Mifsud
patent: 4312050 (1982-01-01), Lucas
patent: 4458341 (1984-07-01), Goebel
patent: 4512001 (1985-04-01), Mayne et al.
patent: 4564927 (1986-01-01), Kolb
The Seismograph Service Companies, Non-Linear Vibrator Sweeps Development Report: SSC-1011, Geophysics, 12/85, p. 4.
Capon, Jack, Analysis of Rayleigh-Wave Multipath Propagation, Bulletin Seismologic Soc., vol. 60 #5, pp. 1701-1731.
Comfort James T.
Devine Thomas G.
Kyle Deborah L.
Sharp Melvin
Steinberger Brian S.
LandOfFree
Source tunable array for ground roll reduction does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Source tunable array for ground roll reduction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Source tunable array for ground roll reduction will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1638909