Calibration models for measuring moisture in unsaturated formations by neutron logging

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Description

Calibration models containing known amounts of hydrogen have been constructed to simulate unsaturated earth formations for calibrating neutron well logging tools. The models are made of dry mixtures of hydrated alumina (Al(OH){sub 3}) with either silica sand (SiO{sub 2}) or aluminum oxide (Al{sub 2}O{sub 3}). Hydrogen in the hydrated alumina replaces the hydrogen in water for neutron scattering, making it possible to simulate partially saturated formations. The equivalent water contents for the models are 5%, 12%, 20%, and 40% by volume in seven tanks that have a diameter of 1.5 m and a height of 1.8 m. Steel casings of ... continued below

Physical Description

30 p.

Creation Information

Engelman, R. E.; Lewis, R. E. & Stromswold, D. C. October 1995.

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  • Pacific Northwest Laboratory
    Publisher Info: Pacific Northwest Lab., Richland, WA (United States)
    Place of Publication: Richland, Washington

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Description

Calibration models containing known amounts of hydrogen have been constructed to simulate unsaturated earth formations for calibrating neutron well logging tools. The models are made of dry mixtures of hydrated alumina (Al(OH){sub 3}) with either silica sand (SiO{sub 2}) or aluminum oxide (Al{sub 2}O{sub 3}). Hydrogen in the hydrated alumina replaces the hydrogen in water for neutron scattering, making it possible to simulate partially saturated formations. The equivalent water contents for the models are 5%, 12%, 20%, and 40% by volume in seven tanks that have a diameter of 1.5 m and a height of 1.8 m. Steel casings of inside diameter 15.4 cm (for three models) and diameter 20.3 cm (for four models) allow logging tool access to simulate logging through cased boreholes.

Physical Description

30 p.

Notes

INIS; OSTI as DE96001804

Source

  • Other Information: PBD: Oct 1995

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  • Other: DE96001804
  • Report No.: PNL--10801
  • Grant Number: AC06-76RL01830
  • DOI: 10.2172/123217 | External Link
  • Office of Scientific & Technical Information Report Number: 123217
  • Archival Resource Key: ark:/67531/metadc624621

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Creation Date

  • October 1995

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • April 7, 2016, 2:29 p.m.

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Engelman, R. E.; Lewis, R. E. & Stromswold, D. C. Calibration models for measuring moisture in unsaturated formations by neutron logging, report, October 1995; Richland, Washington. (digital.library.unt.edu/ark:/67531/metadc624621/: accessed September 26, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.