A A A Ц Ц Ц Ц

ШРИФТ:

Arial Times New Roman

ИНТЕРВАЛ:

х1 х1.5 х2

КЕРНИНГ:

Обычный Средний Большой

ИЗОБРАЖЕНИЯ:

Черно-белые Цветные
For the visually impaired Standard Version
Scientific, Technological and Production Journal
ISSN 2079–3332 (print)
ISSN 3034-6835 (online)
founded in 2001

Correction of well azimuth in directional drilling

Original articles: 2025 No 5

Correction of well azimuth in directional drilling

DOI: https://doi.org/10.56195/20793332-2025-25-5-55-67

Read in pdf B.N. Bukhtoyarov1, O.R. Starikova1, A.A. Vinogradova2
  1. Gazprom Neft Shelf LLC, St. Petersburg, Russian Federation
  2. St. Petersburg Mining University of Empress Catherine II, St. Petersburg, Russian Federation
p. 55-67, No.5/2025
Abstract:
The productivity of oil and gas wells is ensured by achieving geological drilling objectives and the optimal placement of the productive wellbore section within the reservoir. Accordingly, improving the accuracy of well placement and determining their actual trajectories is a fundamental task in oil and gas drilling. Magnetic elements of the drill string can introduce significant distortions into the readings of the Z-axis magnetometer of the MWD (Measurement While Drilling) telemetry system and are one of the primary causes of azimuth errors. The article focuses on compensating for the magnetic interference from the drill string. It reviews the main methods for eliminating external magnetic influence on telemetry system measurements—hardware measures, single-station correction, multi-station analysis (MSA)—and their limitations. It is shown that in a number of cases, the application of these correction methods allows for significant trajectory adjustment and brings the accuracy of the magnetic survey closer to that of gyroscopic surveys. Data on the results of MSA correction of well trajectories are provided, with an assessment of the ‘raw’ and corrected trajectories relative to gyroscopic surveys. This article is a continuation of publications in issues No. 3 and No. 4, 2025, of the journal “Mine Surveying and Subsurface Use”, dedicated to the general description of mine surveying well position control and the use of geomagnetic data in the oil and gas industry.
Keywords:
axial interference of the drill string, cross-axial drill string interference (DSI), non-magnetic drill collars (NDC), Short Collar Correction (SSC), short NDC method, multi-station analysis (MSA)
For citation:
Bukhtoyarov B.N., Starikova O.R., Vinogradova A.A. Correction of well azimuth in directional drilling. Mine Surveying and Subsurface Use. 2025;25(5):00-00. https://doi.org/
Information about the authors:
  1. Boris N. Bukhtoyarov – Head of Surveying and Geodesy Department, Gazprom Neft Shelf LLC, 191186, St. Petersburg, Russian Federation, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
  2. Oksana R. Starikova – Deputy Head of the Surveying and Geodesy Department of Gazprom Neft Shelf LLC, 191186, St. Petersburg, Russian Federation, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
  3. Anastasia A. Vinogradova – 5th year student, St. Petersburg Mining University of Empress Catherine II, 199106, St. Petersburg, Russian Federation, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
References:
  1. 1. Бухтояров Б.Н., Старикова О.Р. Маркшейдерский контроль пространственного положения скважин. Маркшейдерия и недропользование. 2025; 25 (3): 21-28. Bukhtoyarov B.N., Starikova O.R. Surveying control of the spatial position of wells. Mine Surveying and subsurface use. 2025; 25 (3): 21-28. (In Russ.). https://doi.org/10.56195/20793332-2025-25-3-21-28.
  2. 2. Бухтояров Б.Н., Старикова О.Р., Петров В.Г., и др. Геомагнитные данные для направленного бурения и позиционирования скважин. Маркшейдерия и недропользование. 2025; 25 (4): 71-82. Bukhtoyarov B.N., Starikova O.R., Petrov V.G., et al. Geomagnetic data for directional drilling and well positioning. Mine Surveying and subsurface use. 2025; 25 (4): 71-82. (In Russ.). https://doi.org/10.56195/207933322025-25-4-71-82.
  3. 3. Introduction to Wellbore Positioning. ISCWSA: Well Intercept Sub-committee eBook URL: https://www.uhi.ac.uk/en/wellbore-positioning- download/.
  4. 4. Grindrod S.J., Wolff J.M., Calculation of NMDC Length Required for Various Latitudes Developed from Field Measurements of Drill String Magnetization. Paper IADC/SPE 11382 presented at the 1983 IADC/SPE Drilling Conference. New Orleans, 1983.
  5. 5. Wilson H., Brooks A.G. Wellbore Position Errors Caused by Drilling Fluid Contamination. Paper presented at the SPE Annual Technical Conference and Exhibition. New Orleans, Louisiana, 2001. https://doi.org/10.2118/71400-MS.
  6. 6. Edvardsen I., Nyrnes E., Gullikstad J. et al. Best Practices and Recommendations for Magnetic Directional Surveying in the Barents Sea. Paper presented at the SPE Norway One Day Seminar. Bergen, Norway, 2019. https://doi.org/10.2118/195600-MS.
  7. 7. Russell A.W., Roesler R.F. Reduction of Nonmagnetic Drill Collar Length Through Magnetic Azimuth Correction Technique. Paper presented at the SPE/IADC Drilling Conference. New Orleans, Louisiana, 1985. https://doi.org/10.2118/13476-MS.
  8. 8. Cheatham C.A., Shih S., Churchwell D.L., et al. Effects of Magnetic Interference on Directional Surveys in Horizontal Wells. Paper presented at the IADC/SPE Drilling Conference. New Orleans, Louisiana, 1992. https://doi.org/10.2118/23852-MS.
  9. 9. Brooks A.G., Gurden P.A., Noy K.A. Practical Application of a Multiple-Survey Magnetic Correction Algorithm. Paper presented at the SPE Annual Technical Conference and Exhibition. New Orleans, Louisiana, 1998. https://doi.org/10.2118/49060-MS.
  10. 10. Nyrnes E., Torkildsen T., Wilson H. Minimum Requirements for Multi-Station Analysis of MWD Magnetic Directional Surveys. Paper presented at the Middle East Drilling Technology Conference & Exhibition. Manama, Bahrain, 2009. https://doi.org/10.2118/125677-MS.
  11. 11. Hanak F. C., Wilson H., Gjertsen M. Assessment of the Validity of MWD Survey Accuracy Following Multistation Analysis. Conference: SPE/IADC Drilling Conference and Exhibition. London, United Kingdom, 2015. https://doi.org/10.2118/173098-MS.
  12. 12. Ekseth R., Kovalenko K., Weston J.L., et al. The Reliability Problem Related to Directional Survey Data. Paper presented at the IADC/SPE Asia Pacific Drilling Technology Conference and Exhibition. Bangkok, Thailand, 2006. https://doi.org/10.2118/103734-MS.
  13. 13. Ekseth R., Torkildsen T., Brooks A., et al. High Integrity Wellbore Surveys: Methods for Eliminating Gross Errors. SPE/IADC 105558 presented at the SPE/IADC Drilling Conference. Amsterdam, The Netherlands, 2007. https://doi.org/10.2118/105558-MS.
  14. 14. Nyrnes E., Torkildsen T. Analyses of the Accuracy and Reliability of Magnetic Directional Surveys. Paper presented at the SPE/IADC Middle East Drilling Technology Conference and Exhibition. Dubai, United Arab Emirates, 2005. https://doi.org/10.2118/96211-MS.
  15. 15. Bulychenkov K. Improving Multistation Analysis of MWD Directional Magnetic Surveys. Paper presented at the SPE Arctic and Extreme Environments Technical Conference and Exhibition. Moscow, Russia, 2013. https://doi.org/10.2118/166865-MS.

 

Золото России и СНГ

New materials