CA2615392A1 - Method of compensating measurements made by a downhole survey instrument - Google Patents
Method of compensating measurements made by a downhole survey instrument Download PDFInfo
- Publication number
- CA2615392A1 CA2615392A1 CA002615392A CA2615392A CA2615392A1 CA 2615392 A1 CA2615392 A1 CA 2615392A1 CA 002615392 A CA002615392 A CA 002615392A CA 2615392 A CA2615392 A CA 2615392A CA 2615392 A1 CA2615392 A1 CA 2615392A1
- Authority
- CA
- Canada
- Prior art keywords
- measurements
- fitting
- survey instrument
- downhole
- corrected
- 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
Links
Landscapes
- Gyroscopes (AREA)
Abstract
A method of compensating measurements made by a downhole survey instrument comprises making measurements with the downhole survey instrument at a plurality of rotational positions; applying a first correction to the measurements using a thermal model to give a first set of corrected measurements; fitting a sinusoidal function of angular position to the first set of corrected measurements;
fitting a polynomial function of temperature to a residual remaining after the sinusoidal fitting;
and determining a corrected bias for the measurements made by the downhole gyroscope using results of the polynomial fitting.
fitting a polynomial function of temperature to a residual remaining after the sinusoidal fitting;
and determining a corrected bias for the measurements made by the downhole gyroscope using results of the polynomial fitting.
Claims (3)
1. A method of compensating measurements made by a downhole survey instrument, the method comprising:
(a) making measurements with the downhole survey instrument at a plurality of rotational positions;
(b) applying a first correction to said measurements using a thermal model to give a first set of corrected measurements;
(c) fitting a sinusoidal function of angular position to the first set of corrected measurements;
(d) fitting a polynomial function of temperature to a residual remaining after said sinusoidal fitting; and (e) determining a corrected bias for said measurements made by the downhole gyroscope using results of said polynomial fitting.
(a) making measurements with the downhole survey instrument at a plurality of rotational positions;
(b) applying a first correction to said measurements using a thermal model to give a first set of corrected measurements;
(c) fitting a sinusoidal function of angular position to the first set of corrected measurements;
(d) fitting a polynomial function of temperature to a residual remaining after said sinusoidal fitting; and (e) determining a corrected bias for said measurements made by the downhole gyroscope using results of said polynomial fitting.
2. The method of claim 1 wherein aid survey instrument comprises a gyroscope.
3. The method of claim 1 wherein said survey instrument comprises an accelerometer.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US49330003P | 2003-08-07 | 2003-08-07 | |
| US60/493,300 | 2003-08-07 | ||
| CA002476789A CA2476789C (en) | 2003-08-07 | 2004-08-06 | Gyroscopic steering tool using only a two-axis rate gyroscope and deriving the missing third axis |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002476789A Division CA2476789C (en) | 2003-08-07 | 2004-08-06 | Gyroscopic steering tool using only a two-axis rate gyroscope and deriving the missing third axis |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2615392A1 true CA2615392A1 (en) | 2005-02-07 |
| CA2615392C CA2615392C (en) | 2011-06-21 |
Family
ID=39264346
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2614505A Expired - Fee Related CA2614505C (en) | 2003-08-07 | 2004-08-06 | Method of using a two-axis gyroscopic |
| CA2615392A Expired - Fee Related CA2615392C (en) | 2003-08-07 | 2004-08-06 | Method of compensating measurements made by a downhole survey instrument |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2614505A Expired - Fee Related CA2614505C (en) | 2003-08-07 | 2004-08-06 | Method of using a two-axis gyroscopic |
Country Status (1)
| Country | Link |
|---|---|
| CA (2) | CA2614505C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2541972A (en) * | 2016-06-09 | 2017-03-08 | Noralis Ltd | Method for determining position with improved calibration by opposing sensors |
| GB2541971A (en) * | 2016-06-09 | 2017-03-08 | Noralis Ltd | Method for determining position with improved calibration |
| US9745843B1 (en) | 2016-06-09 | 2017-08-29 | Noralis Limited | Method for determining position with improved calibration |
| US9885232B2 (en) | 2016-06-09 | 2018-02-06 | Noralis Limited | Method for determining position with improved calibration with opposing sensors |
| CN112145165B (en) * | 2019-12-26 | 2024-04-23 | 中国海洋石油集团有限公司 | Microcrack-pore type reservoir dynamic and static permeability conversion method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11965408B2 (en) * | 2020-10-30 | 2024-04-23 | Vector Magnetics, Llc | Magnetic borehole surveying method and apparatus |
-
2004
- 2004-08-06 CA CA2614505A patent/CA2614505C/en not_active Expired - Fee Related
- 2004-08-06 CA CA2615392A patent/CA2615392C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2541972A (en) * | 2016-06-09 | 2017-03-08 | Noralis Ltd | Method for determining position with improved calibration by opposing sensors |
| GB2541971A (en) * | 2016-06-09 | 2017-03-08 | Noralis Ltd | Method for determining position with improved calibration |
| US9745843B1 (en) | 2016-06-09 | 2017-08-29 | Noralis Limited | Method for determining position with improved calibration |
| GB2541971B (en) * | 2016-06-09 | 2017-11-01 | Noralis Ltd | Method for determining position with improved calibration |
| GB2541972B (en) * | 2016-06-09 | 2017-11-01 | Noralis Ltd | Method for determining position with improved calibration by opposing sensors |
| US9885232B2 (en) | 2016-06-09 | 2018-02-06 | Noralis Limited | Method for determining position with improved calibration with opposing sensors |
| CN112145165B (en) * | 2019-12-26 | 2024-04-23 | 中国海洋石油集团有限公司 | Microcrack-pore type reservoir dynamic and static permeability conversion method |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2615392C (en) | 2011-06-21 |
| CA2614505C (en) | 2014-04-15 |
| CA2614505A1 (en) | 2005-02-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2003239285A1 (en) | Method for measuring and calibrating measurements using optical fiber distributed sensor | |
| WO2007050474A3 (en) | Altitude correction of a navigational device | |
| WO2005059473A3 (en) | Calibration of a surveying instrument | |
| AU2003236348A1 (en) | Inclination sensor, method of manufacturing inclination sensor, and method of measuring inclination | |
| WO2006014459A3 (en) | Method and system for golf swing analysis and training for putters | |
| WO2007076230A3 (en) | Method and apparatus of obtaining improved location accuracy using magnetic field mapping | |
| WO2007075510A3 (en) | Gas flow sensor system and method of self-calibration | |
| AU2003216997A1 (en) | Dynamic artefact comparison | |
| WO2007061963A3 (en) | Method of making an x-y axis dual-mass tuning fork gyroscope with vertically integrated electronics and wafer-scale hermetic packaging | |
| WO2004046649A3 (en) | Method of calibrating bias drift with temperature for a vibrating structure gyroscope | |
| EP2574879A3 (en) | Systems and methods for thermal gradient compensation for ring laser gyroscopes | |
| EP1863071A4 (en) | Shot shape measuring method, mask | |
| AU2002301925A1 (en) | Method for Determining Wellbore Diameter by Processing Multiple Sensor Measurements | |
| MY132776A (en) | Method and device for determining an angular error and use of the device | |
| WO2006107322A3 (en) | Method for compensating errors in interferometric surface metrology | |
| WO2006096245A3 (en) | Inertial measurement system and method with sensor bias cancellation | |
| EP1570301A4 (en) | Retroreflector with controlled divergence made by the method of localized substrate stress | |
| NO20014352D0 (en) | Sensor cable, as well as fabrication procedure | |
| SG147288A1 (en) | Lithographic apparatus, device manufacturing method and angular encoder | |
| CA2615392A1 (en) | Method of compensating measurements made by a downhole survey instrument | |
| DE50007700D1 (en) | METHOD FOR CORRECTING AN ANGLE ERROR OF AN ABSOLUTELY ANGLE SENSOR | |
| WO2000015016A3 (en) | Method and device for calibrating a displacement path and/or angular position of a holding device in a device for producing electrical assembly groups and calibration substrate | |
| EP1639317B8 (en) | Rotational speed sensor comprising a vibrating gyroscope and method for equalising the rotational speed sensor | |
| NO20053368D0 (en) | Process for the preparation of a pharmaceutically pure polymorph I of olanzapine. | |
| AU2003283749A1 (en) | Method for determining normal measurements for a patient |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20160808 |