Method of processing data from a dual detector LWD density...

Details Method of processing data from a dual detector LWD density... Method of processing data from a dual detector LWD density...

2006-10-31

2006-10-31

Gabor, Otilia (Department: 2878)

Radiant energy

Geological testing or irradiation

Well testing apparatus and methods

C250S264000

Reexamination Certificate

active

07129477

ABSTRACT:
A logging-while-drilling density sensor includes a gamma ray source and at least two NaI detectors spaced apart from the source for determining measurements indicative of the formation density. An acoustic caliper is used for making standoff measurements of the NaI detectors. Measurements made by the detectors are partitioned into standoff bins. An adaptive spine and rib method uses the standoff measurements to obtain density estimates. The method of the invention may also be used with neutron porosity logging devices.

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