Electricity: measuring and testing – Particle precession resonance – Using well logging device
Reexamination Certificate
2005-01-18
2005-01-18
Shrivastav, Brij B. (Department: 2859)
Electricity: measuring and testing
Particle precession resonance
Using well logging device
C324S300000
Reexamination Certificate
active
06844729
ABSTRACT:
A method of using nuclear spectroscopy measurements acquired while drilling a subsurface formation including: measuring indicators of a plurality of absolute or relative formation elemental concentrations; processing the measurements to determine a petrophysical parameter associated with the subsurface formation while drilling, and using the petrophysical parameter to determine a drilling parameter. The petrophysical parameter may include, for instance, the permeability of the subsurface formation and the drilling parameter may include, for instance, a change in the orientation of a directional drilling assembly or the point at which to stop drilling. The invention further involves an apparatus adapted to carry out the inventive method.
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Herron Michael M.
Herron Susan L.
Batzer William B.
Ryberg John J.
Schlumberger Technology Corporation
Shrivastav Brij B.
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