A Study of the Dielectric Properties of Dry and Saturated Green River Oil Shale

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We measured dielectric permittivity of dry and fluid-saturated Green River oil shale samples over a frequency range of 1 MHz to 1.8 GHz. Dry sample measurements were carried out between room temperature and 146 C, saturated sample measurements were carried out at room temperature. Samples obtained from the Green River formation of Wyoming and from the Anvil Points Mine in Colorado were cored both parallel and perpendicular to layering. The samples, which all had organic richness in the range of 10-45 gal/ton, showed small variations between samples and a relatively small level of anisotropy of the dielectric properties when dry. ... continued below

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Sweeney, J; Roberts, J & Harben, P February 7, 2007.

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We measured dielectric permittivity of dry and fluid-saturated Green River oil shale samples over a frequency range of 1 MHz to 1.8 GHz. Dry sample measurements were carried out between room temperature and 146 C, saturated sample measurements were carried out at room temperature. Samples obtained from the Green River formation of Wyoming and from the Anvil Points Mine in Colorado were cored both parallel and perpendicular to layering. The samples, which all had organic richness in the range of 10-45 gal/ton, showed small variations between samples and a relatively small level of anisotropy of the dielectric properties when dry. The real and imaginary part of the relative dielectric permittivity of dry rock was nearly constant over the frequency range observed, with low values for the imaginary part (loss factor). Saturation with de-ionized water and brine greatly increased the values of the real and imaginary parts of the relative permittivity, especially at the lower frequencies. Temperature effects were relatively small, with initial increases in permittivity to about 60 C, followed by slight decreases in permittivity that diminished as temperature increased. Implications of these observations for the in situ electromagnetic, or radio frequency (RF) heating of oil shale to produce oil and gas are discussed.

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PDF-file: 34 pages; size: 0.4 Mbytes

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  • Journal Name: Energy & Fuels, vol. 7, n/a, August 25, 2007, pp. 150-158

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  • Report No.: UCRL-JRNL-228181
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 919595
  • Archival Resource Key: ark:/67531/metadc895872

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  • February 7, 2007

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  • Sept. 27, 2016, 1:39 a.m.

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  • Dec. 2, 2016, 1:04 p.m.

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Sweeney, J; Roberts, J & Harben, P. A Study of the Dielectric Properties of Dry and Saturated Green River Oil Shale, article, February 7, 2007; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc895872/: accessed October 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.