While-drilling apparatus for measuring streaming potentials and determining earth formation characteristics and other useful information
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United States of America Patent
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Jun 17, 2008
Grant Date -
Jul 26, 2007
app pub date -
Sep 9, 2005
filing date -
Jun 18, 2004
priority date (Note) -
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Abstract
Logging-while-drilling apparatus and methodologies for measuring streaming potential in an earth formation are provided. The apparatus and methodologies can be utilized to find information relevant to the drilling operations. In particular, since the streaming potential measurement relates directly to fluid flow, the streaming potential measurements can be used to track flow of fluids in the formation. In turn, this information may be used to find information relevant to the drilling operations, such as under-balanced drilling conditions, abnormal formation pressures, open fractures, the permeability of the formation, and formation pressure.
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