Measurement of standoff corrected photoelectric factor

Radiant energy – Geological testing or irradiation – Well testing apparatus and methods

Reexamination Certificate

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C250S269300

Reexamination Certificate

active

07573027

ABSTRACT:
A photoelectric factor (PEF) that is corrected for standoff effects is obtained from measurements made with a single detector. A first PEF is obtained using a first pair of soft and hard windows and a second PEF is obtained using a second pair of soft and hard windows. Additional correction to the PEF may be made using a formation density measured by the logging tool.

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