Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Land-refraction type
Patent
1987-06-02
1988-12-06
Jordan, Charles T.
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Land-refraction type
367 37, 367 75, 73152, G01V 100
Patent
active
047899697
ABSTRACT:
The invention permits the measurement of the propagation anisotropy of a transverse wave between two given reference points of a non-isotropic medium (M), particularly a shear wave in a stratified or fissured rock.
According to the invention: a source (S) and two detectors (G.sub.1, G.sub.2) are arranged along a single ray vector, the detectors being positioned at the location of respective reference points; the source is excited by an excitation signal producing a transverse wave in the medium; the respective resultant measurement signals produced by each of the detectors are received; from the excitation signal and the measurement signals the transfer function of the medium along each of the respective source-detector paths is determined; the differential transfer function of the medium between the two reference points is deduced.
Other configurations can also be provided, particularly two sources and one detector, or the method can be applied to seismic reflection with waves having an oblique incidence or even a zero incidence.
REFERENCES:
patent: 3003577 (1961-10-01), Itria
patent: 3622965 (1971-11-01), Wu
patent: 3946598 (1976-03-01), Towne et al.
patent: 4080836 (1978-03-01), Thompson et al.
patent: 4138894 (1979-02-01), Robert et al.
patent: 4501150 (1985-02-01), Rouge
patent: 4648039 (1987-03-01), Devaney et al.
patent: 4713968 (1987-12-01), Yale
"Ultrasonic SH Wave Velocity in Textured Aluminum Plates", Ultrasonics, vol. 23, No. 5, Sep. 1985, Allen, Langman, and Sayers.
"Investigation of Shear Waves", by R. N. Jolly, Geophysics, vol. 21, pp. 908-919, 926-938.
"The Anisotropic Distortion of Reflection Seismic Sections", by Mason, Worthington and Smith; 51st Ann. Int. Seq. Mtg. Tech, Pap. #5172 (1981).
"Acoustical Polarameter" by Rouge, 1982 Ultrasonics Symposium Proceedings, vol. 2, pp. 861-863, Oct. 27-29, 1982.
"The detection of Liquids and Viscoelastic Substances Trapped Under Solid Surfaces" by Jones et al., Journal of the Acoustical Society of American, vol. 79, No. 1, Jan. 1986.
Compagnie Generale de Geophysique
Eldred John W.
Jordan Charles T.
LandOfFree
Method of measuring the anisotropy of propagation or reflection does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of measuring the anisotropy of propagation or reflection , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of measuring the anisotropy of propagation or reflection will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1497197