Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Well logging
Patent
1984-12-03
1987-10-27
Moskowitz, Nelson
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Well logging
181104, G01V 140
Patent
active
047034599
ABSTRACT:
An acoustic logging apparatus and method are disclosed for determining the direction of a subsurface noise source, such as a blowout well or fluid channeling behind well casing. The apparatus comprises cylindrical piezoelectric crystal transducers processed to buck each other. The method employs such an apparatus and includes generating and observing output from the crystals. The direction of the noise relative to the position of the apparatus is indicated by determining the position of the crystal transducers when their phase and amplitude differences are at a minimum. The transducer leading in phase at a point perpendicular to said position is the transducer closest to the noise source and is used to indicate the absolute direction of the noise.
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Burleson Karen T.
Exxon Production Research Company
Hoster Jeffrey M.
Lobo Ian J.
Moskowitz Nelson
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