Seafloor velocity and amplitude measurement apparatus and method

Details Seafloor velocity and amplitude measurement apparatus and method Seafloor velocity and amplitude measurement apparatus and method

1982-04-05

1985-12-10

Moskowitz, Nelson

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Offshore prospecting

181110, G01V 116, G01V 138

Patent

active

045584370

ABSTRACT:
The invention provides an improved method and apparatus (10) for measuring the velocity and amplitude of sound waves (150) from acoustic pulses (145) generated near the mudline (130) of the seafloor (120). The apparatus (10) includes a seismic source (30) for generating the acoustic pulses, one or a plurality of vertically spaced sensors (50) located vertically below the seismic source (30) for sensing when the sound waves (150) impact the sensors (50), a hydrophone sensor (200) located on the vessel (60) for measuring the distance to the seismic source (30) a crane and winch for pulling the embedded sensors (50) upwardly and out from the sediments, and means (100) for firing the seismic source when said sensors (50) are being pulled upwardly, for taking amplitude and velocity measurements from each sensor, and for determining the distance the sensors have been pulled upwardly for each acoustical pulse operation.

REFERENCES:
patent: Re27750 (1973-09-01), Daniels et al.
patent: 2480561 (1949-08-01), Ewing et al.
patent: 3233694 (1966-02-01), Roever
patent: 3350683 (1967-10-01), Sengbush
patent: 3379273 (1968-04-01), Chelminski
patent: 3912042 (1975-10-01), Pauletich
patent: 4302824 (1981-11-01), Goymour
patent: 4376301 (1983-03-01), Roberts
patent: 4405036 (1983-09-01), Wener et al.
patent: 4446538 (1984-05-01), Zachariadis

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