| 摘要 |
TITLE: SEISMIC DATA METHOD AND APPARATUS Method and apparatus are disclosed which incorporate a geophone at the lower end of a drill string immediate the drill bit for detecting seismic signals generated at the earth's surface for determining formation characteristics, structural conformation, well parameters, and the location of the drill bit relative to known surface locations. In an embodiment, the geophone device is provided within a mud motor housing carried on the drill string for reciprocation of the drill bit. In a preferred embodiment, a procedure incorporates the invention in a horizontal well application. Additional geophones may be provided on the surface for detecting reverberation of sonic waves generated at the earth's surface. .
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