Radiant energy – Geological testing or irradiation – Well testing apparatus and methods
Patent
1997-03-04
1998-09-08
Tokar, Michael J.
Radiant energy
Geological testing or irradiation
Well testing apparatus and methods
2502692, G01V 510
Patent
active
058048200
ABSTRACT:
Apparatus for determining the density of underground formations surrounding a borehole, such as a wireline logging tool or a logging-while-drilling tool, includes a neutron source for irradiating the formations from within the borehole and at least one detector which detects neutrons and gamma rays in the borehole resulting from the irradiation of the formations with neutrons. Multiple detectors can also be used to separately detect neutrons and gamma rays. Detected neutron and gamma ray signals are each analyzed and combined to determine the density of an earth formation.
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R.E. Plasek, R.A. Adolph, C. Stoller, D.J. Willis, E.E. Bordon and M.G. Portal; "Improved Pulsed Neutron Capture Logging with Slim Carbon-Oxygen Tools: Methodology", SPE Annual Technical Conference & Exhibition, Dallas, Texas, Oct. 22-25, 1995. (SPE 30598).
Evans Michael L.
Holenka Jacques M.
Hanig Richard
Japan National Oil Corporation
Kanak Wayne I.
Schlumberger Technology Corporation
Tokar Michael J.
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