Borehole invariant porosity measurement system

Details Borehole invariant porosity measurement system Borehole invariant porosity measurement system

1996-06-17

1998-06-16

Hannaher, Constantine

Radiant energy

Geological testing or irradiation

Well testing apparatus and methods

250266, G01V 500

Patent

active

057675104

ABSTRACT:
Methods of apparatus for determining porosities of earth formations penetrated by a borehole, and more specifically for determining porosities of earth formations while the borehole is being drilled. Borehole invariant neutron porosity measurements are obtained using a borehole tool which provides the response of two detectors spaced axially at different spacings from a neutron source. No independent measure of borehole geometry is required to correct the resulting porosity measurements for variations in borehole size or variations of the position of the borehole tool within the borehole.

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