Radiant energy – Geological testing or irradiation – Well testing apparatus and methods
Patent
1997-03-06
1999-06-15
Hannaher, Constantine
Radiant energy
Geological testing or irradiation
Well testing apparatus and methods
G01V 500
Patent
active
059124601
ABSTRACT:
An advanced method for determining formation density in an array-detector density tool uses three or more detectors to yield an improved accuracy and precision of the formation density measurement even in the presence of a large standoff between the tool and the formation. A more accurate photoelectric factor is determined through a new single detector algorithm. Use of the information on the photoelectric effect and the density from the three detectors allows the measurement of a photoelectric effect compensated for stand off and the photoelectric factor of the mudcake. The use of the multi-detector density answers allows for a consistency check and therefore a much improved quality control of the density measurement.
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DasGupta Urmi
Philip Olivier G.
Stoller Christian
Wijeyesekera Nihal I.
Wraight Peter D.
Hannaher Constantine
Jeffery Brigitte L.
Ryberg John J.
Schlumberger Technology Corporation
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