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GB2324608A - Method for conducting moving or rolling check shot for correcting borehole azimuth surveys - Google Patents

Method for conducting moving or rolling check shot for correcting borehole azimuth surveys

Info

Publication number
GB2324608A
GB2324608A GB9814912A GB9814912A GB2324608A GB 2324608 A GB2324608 A GB 2324608A GB 9814912 A GB9814912 A GB 9814912A GB 9814912 A GB9814912 A GB 9814912A GB 2324608 A GB2324608 A GB 2324608A
Authority
GB
United Kingdom
Prior art keywords
tool
cross
measurements
well
correcting
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
GB9814912A
Other versions
GB2324608A8 (en
GB2324608B (en
GB9814912D0 (en
Inventor
Anne Holmes
Paul F Rodney
Malcolm Shiells Gordon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Baroid Technology Inc
Original Assignee
Baroid Technology Inc
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 Baroid Technology Inc filed Critical Baroid Technology Inc
Publication of GB9814912D0 publication Critical patent/GB9814912D0/en
Publication of GB2324608A publication Critical patent/GB2324608A/en
Publication of GB2324608A8 publication Critical patent/GB2324608A8/en
Application granted granted Critical
Publication of GB2324608B publication Critical patent/GB2324608B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/02—Determining slope or direction
    • E21B47/022—Determining slope or direction of the borehole, e.g. using geomagnetism

Landscapes

  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Geophysics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Measuring Magnetic Variables (AREA)

Abstract

A method is disclosed for correcting the distorting effect of cross-axial magnetic interference on the readings of a well survey tool using a reduced number of measurements and measuring locations. A well survey tool connected to a drill string assembly measures the gravitional and distorted terrestrial magnetic fields at two or more axially displaced locations in an axially extending well bore. The measurements are made from two or more different orientations (tool faces) of the tool about the well axis. Initial values for the tool inclination, azimuth and tool face angle are first determined without correction for the cross-axial magnetic interference introduced by the drill string assembly and the survey tool. Measurements made at each location and tool face are referred to the tool's coordinate system and variations introduced by the different tool face angles are used to estimate the cross-axial interference.
GB9814912A 1996-01-11 1997-01-10 Method for correcting borehole azimuth surveys for cross-axial magnetic interference Expired - Lifetime GB2324608B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US983396P 1996-01-11 1996-01-11
PCT/US1997/000401 WO1997025683A1 (en) 1996-01-11 1997-01-10 Method for conducting moving or rolling check shot for correcting borehole azimuth surveys

Publications (4)

Publication Number Publication Date
GB9814912D0 GB9814912D0 (en) 1998-09-09
GB2324608A true GB2324608A (en) 1998-10-28
GB2324608A8 GB2324608A8 (en) 1999-02-15
GB2324608B GB2324608B (en) 2000-02-02

Family

ID=21739976

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9814912A Expired - Lifetime GB2324608B (en) 1996-01-11 1997-01-10 Method for correcting borehole azimuth surveys for cross-axial magnetic interference

Country Status (4)

Country Link
AU (1) AU1695997A (en)
GB (1) GB2324608B (en)
NO (1) NO983170L (en)
WO (1) WO1997025683A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106522924B (en) * 2016-11-15 2020-01-07 北京恒泰万博石油技术股份有限公司 Method for acquiring azimuth angle in measurement while drilling
CN114673488B (en) * 2022-03-31 2024-06-18 中国石油大学(华东) Adaptive tool face angle estimation method for dynamic pointing rotary steerable drilling tools

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4761889A (en) * 1984-05-09 1988-08-09 Teleco Oilfield Services Inc. Method for the detection and correction of magnetic interference in the surveying of boreholes
US4819336A (en) * 1986-01-22 1989-04-11 Nl Sperry-Sun, Inc. Method of determining the orientation of a surveying instrument in a borehole
US4956921A (en) * 1989-02-21 1990-09-18 Anadrill, Inc. Method to improve directional survey accuracy
US5064006A (en) * 1988-10-28 1991-11-12 Magrange, Inc Downhole combination tool
US5155916A (en) * 1991-03-21 1992-10-20 Scientific Drilling International Error reduction in compensation of drill string interference for magnetic survey tools
US5321893A (en) * 1993-02-26 1994-06-21 Scientific Drilling International Calibration correction method for magnetic survey tools
US5452518A (en) * 1993-11-19 1995-09-26 Baker Hughes Incorporated Method of correcting for axial error components in magnetometer readings during wellbore survey operations

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4761889A (en) * 1984-05-09 1988-08-09 Teleco Oilfield Services Inc. Method for the detection and correction of magnetic interference in the surveying of boreholes
US4819336A (en) * 1986-01-22 1989-04-11 Nl Sperry-Sun, Inc. Method of determining the orientation of a surveying instrument in a borehole
US5064006A (en) * 1988-10-28 1991-11-12 Magrange, Inc Downhole combination tool
US4956921A (en) * 1989-02-21 1990-09-18 Anadrill, Inc. Method to improve directional survey accuracy
US5155916A (en) * 1991-03-21 1992-10-20 Scientific Drilling International Error reduction in compensation of drill string interference for magnetic survey tools
US5321893A (en) * 1993-02-26 1994-06-21 Scientific Drilling International Calibration correction method for magnetic survey tools
US5452518A (en) * 1993-11-19 1995-09-26 Baker Hughes Incorporated Method of correcting for axial error components in magnetometer readings during wellbore survey operations

Also Published As

Publication number Publication date
AU1695997A (en) 1997-08-01
GB2324608A8 (en) 1999-02-15
GB2324608B (en) 2000-02-02
WO1997025683A1 (en) 1997-07-17
GB9814912D0 (en) 1998-09-09
NO983170L (en) 1998-09-11

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Expiry date: 20170109