While-drilling methodology for determining earth formation...

Details While-drilling methodology for determining earth formation... While-drilling methodology for determining earth formation...

2005-09-09

2008-12-16

LeDynh, Bot (Department: 2862)

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

Using electrode arrays, circuits, structure, or supports

C324S347000, C324S354000, C324S355000, C324S356000, C324S366000, C175S050000

Reexamination Certificate

active

07466136

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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