Determining resistivity of a formation adjacent to a borehole having casing by generating constant current flow in portion of casing and using at least two voltage measurement electrodes

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Title: Determining resistivity of a formation adjacent to a borehole having casing by generating constant current flow in portion of casing and using at least two voltage measurement electrodes

Abstract

Methods of operation of different types of multiple electrode apparatus vertically disposed in a cased well to measure information related to the resistivity of adjacent geological formations from within the cased well are described. The multiple electrode apparatus has a minimum of two spaced apart voltage measurement electrodes that electrically engage a first portion of the interior of the cased well and that provide at least first voltage information. Current control means are used to control the magnitude of any selected current that flows along a second portion of the interior of the casing to be equal to a predetermined selected constant. The first portion of the interior of the cased well is spaced apart from the second portion of the interior of the cased well. The first voltage information and the predetermined selected constant value of any selected current flowing along the casing are used in part to determine a magnitude related to the formation resistivity adjacent to the first portion of the interior of the cased well. Methods and apparatus having a plurality of voltage measurement electrodes are disclosed that provide voltage related information in the presence of constant currents flowing along the casing which is used tomore » provide formation resistivity. « less

Inventors:

Vail, III, William Banning ^[1]

(Bothell, WA)

Issue Date:: Sat Jan 01 00:00:00 EST 2000

Research Org.:: ParaMagnetic Logging, Inc. (Bothell, WA)

OSTI Identifier:: 872859

Patent Number(s):: 6025721

Assignee:: ParaMagnetic Logging, Inc. (Woodinville, WA)

Patent Classifications (CPCs):: G - PHYSICS G01 - MEASURING G01V - GEOPHYSICS

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G - PHYSICS G01 - MEASURING G01V - GEOPHYSICS
G01V11/00 - Prospecting or detecting by methods combining techniques covered by two or more of main groups G01V1/00 - G01V9/00
G01V3/24 - using ac

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DOE Contract Number:: FG06-84ER13294

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: determining; resistivity; formation; adjacent; borehole; casing; generating; constant; current; flow; portion; voltage; measurement; electrodes; methods; operation; types; multiple; electrode; apparatus; vertically; disposed; cased; measure; information; related; geological; formations; described; minimum; spaced; apart; electrically; engage; interior; provide; control; means; magnitude; selected; flows; equal; predetermined; value; flowing; determine; plurality; disclosed; presence; currents; apart voltage; constant current; vertically disposed; voltage measurement; measurement electrodes; geological formations; spaced apart; current flow; current flowing; control means; electrode apparatus; multiple electrode; adjacent geological; formation resistivity; geological formation; formation adjacent; measure information; apparatus vertically; information related; determining resistivity; electrically engage; current control; constant value; currents flowing; /324/

Citation Formats


                    Vail, III, William Banning. Determining resistivity of a formation adjacent to a borehole having casing by generating constant current flow in portion of casing and using at least two voltage measurement electrodes.  United States: N. p., 2000. 
        Web.

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                    Vail, III, William Banning. Determining resistivity of a formation adjacent to a borehole having casing by generating constant current flow in portion of casing and using at least two voltage measurement electrodes.  United States.

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                    Vail, III, William Banning. Sat .  
        "Determining resistivity of a formation adjacent to a borehole having casing by generating constant current flow in portion of casing and using at least two voltage measurement electrodes".  United States.  https://www.osti.gov/servlets/purl/872859.

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@article{osti_872859,

  title        = {Determining resistivity of a formation adjacent to a borehole having casing by generating constant current flow in portion of casing and using at least two voltage measurement electrodes},

  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 related to the resistivity of adjacent geological formations from within the cased well are described. The multiple electrode apparatus has a minimum of two spaced apart voltage measurement electrodes that electrically engage a first portion of the interior of the cased well and that provide at least first voltage information. Current control means are used to control the magnitude of any selected current that flows along a second portion of the interior of the casing to be equal to a predetermined selected constant. The first portion of the interior of the cased well is spaced apart from the second portion of the interior of the cased well. The first voltage information and the predetermined selected constant value of any selected current flowing along the casing are used in part to determine a magnitude related to the formation resistivity adjacent to the first portion of the interior of the cased well. Methods and apparatus having a plurality of voltage measurement electrodes are disclosed that provide voltage related information in the presence of constant currents flowing along the casing which is used to provide formation resistivity.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Sat Jan 01 00:00:00 EST 2000},

  month        = {Sat Jan 01 00:00:00 EST 2000}

}

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Works referenced in this record:

A transmission‐line model for electrical logging through casing
journal, December 1993

Kaufman, Alexander A.; Wightman, W. Edward
GEOPHYSICS, Vol. 58, Issue 12
https://doi.org/10.1190/1.1443388

Electrical resistivity measurement through metal casing
journal, July 1994

Schenkel, Clifford J.; Morrison, H. Frank
GEOPHYSICS, Vol. 59, Issue 7
https://doi.org/10.1190/1.1443663

Cement Resistivity and Implications for Measurement of Formation Resistivity Through Casing
conference, April 2013

Klein, J. D.; Martin, P. R.; Miller, A. E.
SPE Annual Technical Conference and Exhibition
https://doi.org/10.2118/26453-MS

Influence of inductive effect on measurements of resistivity through casing
journal, January 1996

Kaufman, Alexander A.; Karinsky, Alexander D.; Wightman, William E.
GEOPHYSICS, Vol. 61, Issue 1
https://doi.org/10.1190/1.1443954

The electrical field in a borehole with a casing
journal, January 1990

Kaufman, Alexander A.
GEOPHYSICS, Vol. 55, Issue 1
https://doi.org/10.1190/1.1442769

Through Casing Resistivity Measurements And Their Interpretation For Hydrocarbon Saturations
conference, April 2013

Vail, W. B.; Momii, S. T.; Dewan, J. T.
SPE Annual Technical Conference and Exhibition
https://doi.org/10.2118/30582-MS

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Determining resistivity of a formation adjacent to a borehole having casing by generating constant current flow in portion of casing and using at least two voltage measurement electrodes

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Methods of operation of different types of multiple electrode apparatus vertically disposed in a cased well to measure information related to the resistivity of adjacent geological formations from within the cased well are described. The multiple electrode apparatus has a minimum of two spaced apart voltage measurement electrodes that electrically engage a first portion of the interior of the cased well and that provide at least first voltage information. Current control means are used to control the magnitude of any selected current that flows along a second portion of the interior of the casing to be equal to a predeterminedmore » « less
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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 contactmore » « less
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Methods of operation of different types of multiple electrode apparatus vertically disposed in a cased well to measure information related to the resistivity of adjacent geological formations from inside the cased well. The multiple electrode apparatus have a minimum of three spaced apart voltage measurement electrodes that electrically engage the interior of the cased well. Measurement information is obtained related to current which is caused to flow from the cased well into the adjacent geological formation. First compensation information is obtained related to a first casing resistance between a first pair of the spaced apart voltage measurement electrodes. Second compensationmore » « less
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Methods of operation are disclosed for different types of multiple electrode apparatus vertically disposed in a cased well to measure information related to the resistivity of adjacent geological formations from inside the cased well. The multiple electrode apparatus have a minimum of three spaced-apart voltage measurement electrodes that electrically engage the interior of the cased well. Measurement information is obtained related to current which is caused to flow from the cased well into the adjacent geological formation. First compensation information is obtained related to a first casing resistance between a first pair of the spaced-apart voltage measurement electrodes. Second compensationmore » « less
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Methods of operation of an apparatus having at least two pairs of voltage measurement electrodes vertically disposed in a cased well to measure the resistivity of adjacent geological formations from inside the cased well. During stationary measurements with the apparatus at a fixed vertical depth within the cased well, the invention herein discloses methods of operation which include a measurement step and subsequent first and second compensation steps respectively resulting in improved accuracy of measurement. First and second order errors of measurement are identified, and the measurement step and two compensation steps provide methods to substantially eliminate their influence onmore » « less
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Similar Records

Title: Determining resistivity of a formation adjacent to a borehole having casing by generating constant current flow in portion of casing and using at least two voltage measurement electrodes

Abstract

Citation Formats

A transmission‐line model for electrical logging through casing journal, December 1993

Electrical resistivity measurement through metal casing journal, July 1994

Cement Resistivity and Implications for Measurement of Formation Resistivity Through Casing conference, April 2013

Influence of inductive effect on measurements of resistivity through casing journal, January 1996

The electrical field in a borehole with a casing journal, January 1990

Through Casing Resistivity Measurements And Their Interpretation For Hydrocarbon Saturations conference, April 2013

A transmission‐line model for electrical logging through casing
journal, December 1993

Electrical resistivity measurement through metal casing
journal, July 1994

Cement Resistivity and Implications for Measurement of Formation Resistivity Through Casing
conference, April 2013

Influence of inductive effect on measurements of resistivity through casing
journal, January 1996

The electrical field in a borehole with a casing
journal, January 1990

Through Casing Resistivity Measurements And Their Interpretation For Hydrocarbon Saturations
conference, April 2013