Advances in crosswell electromagnetics steel cased boreholes

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The Crosswell electromagnetic (EM) induction technique ideally measures the resistivity distribution between boreholes which may often be cased with carbon steel. Quantification of the effect of such steel casing on the induced field is the most significant limitation of the technique. Recent data acquired at a site in Richmond, California quantify the effect of steel casing on induction measurements and demonstrate this effect to be separable. This unique site contains adjacent steel and plastic wells in which frequency soundings demonstrate low spectrum (1.0 - 50 Hz) measurements an effective means of isolating the casing response from, the formation response. It … continued below

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465 Kilobytes pages

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Harben, P E; Kirkendall, B A & Lewis, J P March 1, 1999.

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The Crosswell electromagnetic (EM) induction technique ideally measures the resistivity distribution between boreholes which may often be cased with carbon steel. Quantification of the effect of such steel casing on the induced field is the most significant limitation of the technique. Recent data acquired at a site in Richmond, California quantify the effect of steel casing on induction measurements and demonstrate this effect to be separable. This unique site contains adjacent steel and plastic wells in which frequency soundings demonstrate low spectrum (1.0 - 50 Hz) measurements an effective means of isolating the casing response from, the formation response. It is also shown that the steel casing effect on the induction coil is highly localized, and limited to less than 0.30 meters above and below the coil.

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465 Kilobytes pages

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  • Society or Exploration Geophysicists (SEG) 1999 International Exposition and 69th Annual Meeting, Houston, TX (US), 10/31/1999--11/05/1999

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  • Report No.: UCRL-JC-133853
  • Report No.: AC1005000
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 11324
  • Archival Resource Key: ark:/67531/metadc627976

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Office of Scientific & Technical Information Technical Reports

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  • March 1, 1999

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  • June 16, 2015, 7:43 a.m.

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  • Feb. 18, 2016, 11:31 a.m.

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Harben, P E; Kirkendall, B A & Lewis, J P. Advances in crosswell electromagnetics steel cased boreholes, article, March 1, 1999; California. (https://digital.library.unt.edu/ark:/67531/metadc627976/: accessed May 7, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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