Borehole sonic data processing method

Details Borehole sonic data processing method Borehole sonic data processing method

2005-10-18

2005-10-18

Lobo, Ian J. (Department: 3662)

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Well logging

C367S038000, C367S043000, C367S050000, C702S006000, C702S017000

Reexamination Certificate

active

06956790

ABSTRACT:
A method of processing sonic wireline or logging while drilling data acquired in a borehole that includes filtering the sonic data to attenuate tool-borne and borehole-borne arrivals; migrating the filtered sonic data; and beamforming the filtered and migrated sonic data to determine a position of a reflector with respect to the borehole. The sonic data may be processed down-hole, transmitted to the surface, and used for geosteering purposes while drilling. The filter may comprise an adaptive noise-attenuating filter capable of attenuating noise arising from different borehole modes from desired signal and allowing for changes in the source signature.

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