Methods for use in detecting seismic waves in a borehole

Details Methods for use in detecting seismic waves in a borehole Methods for use in detecting seismic waves in a borehole

2007-02-20

2007-02-20

Martin, Edgardo San (Department: 2837)

Acoustics

Geophysical or subsurface exploration

Seismic wave detection

C181S105000, C181S112000, C367S035000

Reexamination Certificate

active

11378565

ABSTRACT:
The invention provides methods and apparatus for detecting seismic waves propagating through a subterranean formation surrounding a borehole. In a first embodiment, a sensor module uses the rotation of bogey wheels to extend and retract a sensor package for selective contact and magnetic coupling to casing lining the borehole. In a second embodiment, a sensor module is magnetically coupled to the casing wall during its travel and dragged therealong while maintaining contact therewith. In a third embodiment, a sensor module is interfaced with the borehole environment to detect seismic waves using coupling through liquid in the borehole. Two or more of the above embodiments may be combined within a single sensor array to provide a resulting seismic survey combining the optimum of the outputs of each embodiment into a single data set.

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