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Spectral gamma-ray logging III [electronic resource] : formation and thin bed effects

Published
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 1979.
Physical Description
Pages: 23 : digital, PDF file
Additional Creators
Los Alamos Scientific Laboratory and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
The effect of borehole formation parameters on spectral gamma-ray probe response was calculated from radiation theory. Results are presented for the effect of formation bulk density and composition on the gamma-ray spectra from potassium, uranium, and thorium. Experimentally determined response functions are presented for spectral gamma-ray probes logging through thin horizontal beds of potassium, uranium, and thorium. Potassium and thorium thin-bed results were obtained by numerical differentiation of the probe response across the interface between a thick zone containing potassium or thorium and a thick barren zone. Uranium results were obtained both from differentiation of thick zone interface measurements and directly using thin bed uranium models. Measurements were performed by use of sodium iodide detectors of various sizes. Detector size and shape were found to have a larger effect on the thin-bed response function than did the formation parameters, which can affect the transport properties of the gamma rays. Results were used to deconvolve observed borehole logs and obtain concentration with depth for thin ore zones. 10 figures, 1 table.
Report Numbers
E 1.99:la-ur-79-1054
E 1.99: conf-790605-4
conf-790605-4
la-ur-79-1054
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Note
Published through SciTech Connect.
01/01/1979.
"la-ur-79-1054"
" conf-790605-4"
20. annual logging symposium, Tulsa, OK, USA, 3 Jun 1979.
Wilson, R.D.; Evans, M.L.; Jain, M.; Close, D.A.; Stromswold, D.C.
Bendix Field Engineering Corp., Grand Junction, CO (USA)
Funding Information
W-7405-ENG-36
View MARC record | catkey: 14381950