WO2007055786A3 - Ombi tool with guarded electrode current measurement - Google Patents

Ombi tool with guarded electrode current measurement Download PDF

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Publication number
WO2007055786A3
WO2007055786A3 PCT/US2006/034737 US2006034737W WO2007055786A3 WO 2007055786 A3 WO2007055786 A3 WO 2007055786A3 US 2006034737 W US2006034737 W US 2006034737W WO 2007055786 A3 WO2007055786 A3 WO 2007055786A3
Authority
WO
WIPO (PCT)
Prior art keywords
current
borehole wall
ombi
tool
electrode current
Prior art date
Application number
PCT/US2006/034737
Other languages
French (fr)
Other versions
WO2007055786A2 (en
Inventor
Myrick L Monroe
Marian L Morys
Carl Dodge
Original Assignee
Halliburton Energy Serv Inc
Myrick L Monroe
Marian L Morys
Carl Dodge
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Halliburton Energy Serv Inc, Myrick L Monroe, Marian L Morys, Carl Dodge filed Critical Halliburton Energy Serv Inc
Publication of WO2007055786A2 publication Critical patent/WO2007055786A2/en
Publication of WO2007055786A3 publication Critical patent/WO2007055786A3/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/18—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging
    • G01V3/20—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging operating with propagation of electric current
    • G01V3/24—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging operating with propagation of electric current using AC

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

An apparatus and method for guarding the current injection sources of downhole logging tools utilized to determine the resistivity of an adjacent portion of a borehole wall. Two current electrodes are energized to create an oscillatory electric field in a borehole wall. The two current electrodes are each shielded with a conductive shield, maintained at the same electric potential as the current electrode, to prevent current leakage into the logging tool body. A current sensor is coupled between each current electrode and conductive shield to measure the actual current flow injected into the borehole wall from the current electrode and to compensate for current leakage. A voltage detector measures the differential voltage created by the electric field in the borehole wall, and the differential voltage is used in combination with the measured current flow to determine a resistivity value for the borehole wall.
PCT/US2006/034737 2005-11-04 2006-09-07 Ombi tool with guarded electrode current measurement WO2007055786A2 (en)

Applications Claiming Priority (12)

Application Number Priority Date Filing Date Title
US73376105P 2005-11-04 2005-11-04
US60/733,761 2005-11-04
US73510705P 2005-11-09 2005-11-09
US73491705P 2005-11-09 2005-11-09
US73484605P 2005-11-09 2005-11-09
US60/735,107 2005-11-09
US60/734,917 2005-11-09
US60/734,846 2005-11-09
US73610505P 2005-11-10 2005-11-10
US60/736,105 2005-11-10
US42189506A 2006-06-02 2006-06-02
US11/421,895 2006-06-02

Publications (2)

Publication Number Publication Date
WO2007055786A2 WO2007055786A2 (en) 2007-05-18
WO2007055786A3 true WO2007055786A3 (en) 2007-12-13

Family

ID=38023738

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2006/034737 WO2007055786A2 (en) 2005-11-04 2006-09-07 Ombi tool with guarded electrode current measurement

Country Status (1)

Country Link
WO (1) WO2007055786A2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7701229B2 (en) * 2007-10-15 2010-04-20 Halliburton Energy Services, Inc. Methods and systems for measurement of fluid electrical stability
US8129994B2 (en) * 2009-10-19 2012-03-06 Smith International Inc Microresistivity imaging in conductive and nonconductive drilling fluid
GB2590442B (en) 2019-12-18 2022-06-08 Qinetiq Ltd Imaging system
CN111364967A (en) * 2020-03-24 2020-07-03 中国海洋石油集团有限公司 Electric imaging measurement method and electric imaging logging instrument
US11035974B1 (en) 2020-05-13 2021-06-15 Baker Hughes Oilfield Operations Llc Downhole resistivity imaging pad with electrical leakage prevention

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030038634A1 (en) * 2001-08-23 2003-02-27 Kurt-Martin Strack Integrated borehole system for reservoir detection and monitoring
US20030173968A1 (en) * 2000-04-07 2003-09-18 Philip Cheung Method and apparatus for investigating the wall of a borehole

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030173968A1 (en) * 2000-04-07 2003-09-18 Philip Cheung Method and apparatus for investigating the wall of a borehole
US20030038634A1 (en) * 2001-08-23 2003-02-27 Kurt-Martin Strack Integrated borehole system for reservoir detection and monitoring

Also Published As

Publication number Publication date
WO2007055786A2 (en) 2007-05-18

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