Seismic exploration with a swinging-weight vibrator

Details Seismic exploration with a swinging-weight vibrator Seismic exploration with a swinging-weight vibrator

G - Physics

01

V

349/13

G01V 1/153 (2006.01)

Patent

CA 1185689

ABSTRACT The invention pertains to seismic exploration for petroleum by the Vibroseis method using swinging-weight vibrators. A seismic vibrator provides a measure of automatic compensation of frequency-selective action in the vibrator-ground coupling, and comprises in combination a rotatable eccentric weight, a baseplate on which the eccentric weight is mounted and by which the forces generated by the rotation of the eccentric weight may be coupled to the ground. Phase-measuring means are operatively coupled for recording the phase of the rotating weight, and a flywheel with means for coupling the flywheel to the eccentric weight whereby flywheel energy is used to rotate the eccentric weight. The flywheel is mounted to decelerate freely between desired frequency limits as the energy is radiated.

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