Method and apparatus for characterizing and estimating...

Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Earth science

Reexamination Certificate

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C073S152010, C073S152020, C073S152030, C073S152050, C073S152470, C166S250010, C175S050000, C181S102000, C340S856300, C340S856400, C367S014000, C367S025000, C702S002000, C702S006000, C702S187000

Reexamination Certificate

active

07970544

ABSTRACT:
Stoneley-wave data acquired in the LWD environment are used to characterize/estimate formation permeability. Real-time Stoneley-wave time-delay/slowness and center-frequency/attenuation data are used to indicate/characterize formation permeability even during drilling. The use of stabilizers mounted at the tool ends helps maintain the tool position from severe decentralization, reducing ambiguities in the permeability characterization/estimation.

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