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Title: Determining resistivity of a formation adjacent to a borehole having casing with an apparatus having all current conducting electrodes within the cased well

Abstract

Methods of operation of different types of multiple electrode apparatus vertically disposed in a cased well to measure information useful to determine the resistivity of adjacent geological formations from within the cased well are described. The multiple electrode apparatus has a plurality of spaced apart voltage measurement electrodes that electrically engage a portion of the interior of the cased well. During measurements of information useful to determine formation resistivity, current is conducted between a first current conducting electrode in electrical contact with the interior of the cased well to a second current conducting electrode that is also in electrical contact with the interior of the cased well. The first and second current conducting electrodes are separated by a distance sufficient so that at least a portion of the current conducted between the first and second current conducting electrodes is conducted through the geological formation of interest.

Inventors:
 [1]
  1. (Bothell, WA)
Publication Date:
Research Org.:
ParaMagnetic Logging, Inc. (Bothell, WA)
OSTI Identifier:
873784
Patent Number(s):
US 6246240
Assignee:
Western Atlas International, Inc. (Houston, TX)
DOE Contract Number:  
FG06-84ER13294
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
determining; resistivity; formation; adjacent; borehole; casing; apparatus; current; conducting; electrodes; cased; methods; operation; types; multiple; electrode; vertically; disposed; measure; information; useful; determine; geological; formations; described; plurality; spaced; apart; voltage; measurement; electrically; engage; portion; interior; measurements; conducted; electrical; contact; separated; distance; sufficient; current conducting; conducting electrode; apart voltage; vertically disposed; voltage measurement; measurement electrodes; geological formations; electrical contact; spaced apart; electrode apparatus; multiple electrode; adjacent geological; formation resistivity; geological formation; formation adjacent; measure information; apparatus vertically; conducting electrodes; information useful; current conducted; determining resistivity; electrically engage; /324/

Citation Formats

Vail, III, William Banning. Determining resistivity of a formation adjacent to a borehole having casing with an apparatus having all current conducting electrodes within the cased well. United States: N. p., 2001. Web.
Vail, III, William Banning. Determining resistivity of a formation adjacent to a borehole having casing with an apparatus having all current conducting electrodes within the cased well. United States.
Vail, III, William Banning. Mon . "Determining resistivity of a formation adjacent to a borehole having casing with an apparatus having all current conducting electrodes within the cased well". United States. https://www.osti.gov/servlets/purl/873784.
@article{osti_873784,
title = {Determining resistivity of a formation adjacent to a borehole having casing with an apparatus having all current conducting electrodes within the cased well},
author = {Vail, III, William Banning},
abstractNote = {Methods of operation of different types of multiple electrode apparatus vertically disposed in a cased well to measure information useful to determine the resistivity of adjacent geological formations from within the cased well are described. The multiple electrode apparatus has a plurality of spaced apart voltage measurement electrodes that electrically engage a portion of the interior of the cased well. During measurements of information useful to determine formation resistivity, current is conducted between a first current conducting electrode in electrical contact with the interior of the cased well to a second current conducting electrode that is also in electrical contact with the interior of the cased well. The first and second current conducting electrodes are separated by a distance sufficient so that at least a portion of the current conducted between the first and second current conducting electrodes is conducted through the geological formation of interest.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2001},
month = {1}
}

Patent:

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