Subsurface electromagnetic measurement through steel casing

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Description

Numerical calculations show that useful information can be obtained in an electromagnetic crosswell survey where one of the wells is cased in steel. Our simple model is based on the assumption of an infinitely long uniform casing embedded in a homogeneous full space. Nevertheless the results indicate that if the pipe characteristics are independently known then the formation signal can be accurately recovered. This is best done at a single frequency where the pipe attenuation is modest. In fact we show that the optimal frequency for formation signal recovery is defined mainly by the pipe parameters and is largely independent ... continued below

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17 p.

Creation Information

Becker, A. B.; Wang, B. & Lee, K. H. November 1998.

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This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 11 times . More information about this report can be viewed below.

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Description

Numerical calculations show that useful information can be obtained in an electromagnetic crosswell survey where one of the wells is cased in steel. Our simple model is based on the assumption of an infinitely long uniform casing embedded in a homogeneous full space. Nevertheless the results indicate that if the pipe characteristics are independently known then the formation signal can be accurately recovered. This is best done at a single frequency where the pipe attenuation is modest. In fact we show that the optimal frequency for formation signal recovery is defined mainly by the pipe parameters and is largely independent of the formation conductivity.

Physical Description

17 p.

Notes

OSTI as DE00006527

Medium: P; Size: 17 pages

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  • Other Information: Supercedes report DE00006527; PBD: 1 Nov 1998

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  • Report No.: LBNL--42375
  • Grant Number: AC03-76SF00098
  • DOI: 10.2172/6527 | External Link
  • Office of Scientific & Technical Information Report Number: 6527
  • Archival Resource Key: ark:/67531/metadc701868

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  • November 1998

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  • Sept. 12, 2015, 6:31 a.m.

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  • April 7, 2017, 3:46 p.m.

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Becker, A. B.; Wang, B. & Lee, K. H. Subsurface electromagnetic measurement through steel casing, report, November 1998; California. (digital.library.unt.edu/ark:/67531/metadc701868/: accessed September 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.