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Title: Electrical resistance tomography from measurements inside a steel cased borehole

Abstract

Electrical resistance tomography (ERT) produced from measurements taken inside a steel cased borehole. A tomographic inversion of electrical resistance measurements made within a steel casing was then made for the purpose of imaging the electrical resistivity distribution in the formation remotely from the borehole. The ERT method involves combining electrical resistance measurements made inside a steel casing of a borehole to determine the electrical resistivity in the formation adjacent to the borehole; and the inversion of electrical resistance measurements made from a borehole not cased with an electrically conducting casing to determine the electrical resistivity distribution remotely from a borehole. It has been demonstrated that by using these combined techniques, highly accurate current injection and voltage measurements, made at appropriate points within the casing, can be tomographically inverted to yield useful information outside the borehole casing.

Inventors:
 [1];  [2];  [3]
  1. (Livermore, CA)
  2. (Walnut Creek, CA)
  3. (Pleasanton, CA)
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
873092
Patent Number(s):
6088655
Assignee:
Regents of University of California (Oakland, CA) LLNL
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
electrical; resistance; tomography; measurements; inside; steel; cased; borehole; produced; tomographic; inversion; casing; purpose; imaging; resistivity; distribution; formation; remotely; method; involves; combining; determine; adjacent; electrically; conducting; demonstrated; combined; techniques; highly; accurate; current; injection; voltage; appropriate; tomographically; inverted; yield; useful; information; outside; steel cased; current injection; involves combining; voltage measurement; method involves; electrically conducting; electrical resistance; electrical resistivity; borehole casing; resistivity distribution; resistance tomography; formation adjacent; voltage measurements; useful information; cased borehole; resistance measurements; resistance measurement; method involve; cased bore; highly accurate; rate current; /702/

Citation Formats

Daily, William D., Schenkel, Clifford, and Ramirez, Abelardo L. Electrical resistance tomography from measurements inside a steel cased borehole. United States: N. p., 2000. Web.
Daily, William D., Schenkel, Clifford, & Ramirez, Abelardo L. Electrical resistance tomography from measurements inside a steel cased borehole. United States.
Daily, William D., Schenkel, Clifford, and Ramirez, Abelardo L. Sat . "Electrical resistance tomography from measurements inside a steel cased borehole". United States. https://www.osti.gov/servlets/purl/873092.
@article{osti_873092,
title = {Electrical resistance tomography from measurements inside a steel cased borehole},
author = {Daily, William D. and Schenkel, Clifford and Ramirez, Abelardo L.},
abstractNote = {Electrical resistance tomography (ERT) produced from measurements taken inside a steel cased borehole. A tomographic inversion of electrical resistance measurements made within a steel casing was then made for the purpose of imaging the electrical resistivity distribution in the formation remotely from the borehole. The ERT method involves combining electrical resistance measurements made inside a steel casing of a borehole to determine the electrical resistivity in the formation adjacent to the borehole; and the inversion of electrical resistance measurements made from a borehole not cased with an electrically conducting casing to determine the electrical resistivity distribution remotely from a borehole. It has been demonstrated that by using these combined techniques, highly accurate current injection and voltage measurements, made at appropriate points within the casing, can be tomographically inverted to yield useful information outside the borehole casing.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {1}
}

Patent:

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