High definition geomagnetic models: A new perspective for improved wellbore positioning

Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2012

Standard

High definition geomagnetic models: A new perspective for improved wellbore positioning. / Maus, Stefan; Nair, Manoj C.; Poedjono, Benny; Okewunmi, Shola; Fairhead, Derek; Barckhausen, Udo; Milligan, Peter R.; Matzka, Jürgen.

IADC/SPE Drilling Conference and Exhibition. IADC/SPE Drilling Conference and Exhibition, 2012. p. 151436-MS.

Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2012

Harvard

Maus, S, Nair, MC, Poedjono, B, Okewunmi, S, Fairhead, D, Barckhausen, U, Milligan, PR & Matzka, J 2012, 'High definition geomagnetic models: A new perspective for improved wellbore positioning'. in IADC/SPE Drilling Conference and Exhibition. IADC/SPE Drilling Conference and Exhibition, pp. 151436-MS., 10.2118/151436-MS

APA

Maus, S., Nair, M. C., Poedjono, B., Okewunmi, S., Fairhead, D., Barckhausen, U., ... Matzka, J. (2012). High definition geomagnetic models: A new perspective for improved wellbore positioning. In IADC/SPE Drilling Conference and Exhibition. (pp. 151436-MS). IADC/SPE Drilling Conference and Exhibition. 10.2118/151436-MS

CBE

Maus S, Nair MC, Poedjono B, Okewunmi S, Fairhead D, Barckhausen U, Milligan PR, Matzka J. 2012. High definition geomagnetic models: A new perspective for improved wellbore positioning. In IADC/SPE Drilling Conference and Exhibition. IADC/SPE Drilling Conference and Exhibition. pp. 151436-MS. Available from: 10.2118/151436-MS

MLA

Maus, Stefan et al. "High definition geomagnetic models: A new perspective for improved wellbore positioning". IADC/SPE Drilling Conference and Exhibition. IADC/SPE Drilling Conference and Exhibition. 2012. 151436-MS. Available: 10.2118/151436-MS

Vancouver

Maus S, Nair MC, Poedjono B, Okewunmi S, Fairhead D, Barckhausen U et al. High definition geomagnetic models: A new perspective for improved wellbore positioning. In IADC/SPE Drilling Conference and Exhibition. IADC/SPE Drilling Conference and Exhibition. 2012. p. 151436-MS. Available from: 10.2118/151436-MS

Author

Maus, Stefan; Nair, Manoj C.; Poedjono, Benny; Okewunmi, Shola; Fairhead, Derek; Barckhausen, Udo; Milligan, Peter R.; Matzka, Jürgen / High definition geomagnetic models: A new perspective for improved wellbore positioning.

IADC/SPE Drilling Conference and Exhibition. IADC/SPE Drilling Conference and Exhibition, 2012. p. 151436-MS.

Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2012

Bibtex

@inbook{4c423fa649f84a6495be53c9bf32edc6,
title = "High definition geomagnetic models: A new perspective for improved wellbore positioning",
keywords = "Directional drilling, Exhibitions, Geomagnetism, Magnetic fields, Models, Oil field equipment, Well drilling, Magnetic field measurement",
publisher = "IADC/SPE Drilling Conference and Exhibition",
author = "Stefan Maus and Nair, {Manoj C.} and Benny Poedjono and Shola Okewunmi and Derek Fairhead and Udo Barckhausen and Milligan, {Peter R.} and Jürgen Matzka",
year = "2012",
doi = "10.2118/151436-MS",
isbn = "978-1-61399-186-2",
pages = "151436-MS",
booktitle = "IADC/SPE Drilling Conference and Exhibition",

}

RIS

TY - GEN

T1 - High definition geomagnetic models: A new perspective for improved wellbore positioning

A1 - Maus,Stefan

A1 - Nair,Manoj C.

A1 - Poedjono,Benny

A1 - Okewunmi,Shola

A1 - Fairhead,Derek

A1 - Barckhausen,Udo

A1 - Milligan,Peter R.

A1 - Matzka,Jürgen

AU - Maus,Stefan

AU - Nair,Manoj C.

AU - Poedjono,Benny

AU - Okewunmi,Shola

AU - Fairhead,Derek

AU - Barckhausen,Udo

AU - Milligan,Peter R.

AU - Matzka,Jürgen

PB - IADC/SPE Drilling Conference and Exhibition

PY - 2012

Y1 - 2012

N2 - Earth's gravity and magnetic fields are used as natural reference frames in directional drilling. The azimuth of the bottomhole assembly is inferred by comparing the magnetic field measured-while-drilling (MWD) with a geomagnetic reference model. To provide a reference of sufficient quality for accurate well placement, the US National Geophysical Data Center (NGDC), in partnership with industry, has developed high-definition geomagnetic models (HDGM), updated regularly using the latest satellite, airborne and marine measurements of the Earth's magnetic field. Standard geomagnetic reference models represent the main magnetic field originating in the Earth's liquid core, but the new models additionally account for crustal magnetic anomalies, which constitute a significant source of error in directional drilling. NGDC maintains a public archive of global ship and airborne magnetic field measurements. These are compiled into a global magnetic anomaly grid and expanded into ellipsoidal harmonics. The harmonic expansion coefficients are then included in the high-definition models to accurately represent the direction and strength of the local geomagnetic field. The latest global model to degree and order 720 resolves magnetic anomalies down to 28 km half-wavelength, achieving more than an order-of-magnitude improvement over previous models. A side-by-side comparison of different on- and off-shore regions shows the high level of local detail represented in the new model. Accounting for a larger waveband of the geomagnetic spectrum significantly improves the accuracy of the reference field. This directly benefits the reliability of the well azimuth determination. We further demonstrate that model accuracy is a prerequisite for applying drill string interference corrections. Finally, an accurate reference model facilitates the validation of MWD surveys by keeping the field acceptance criteria centered on the true downhole magnetic field. Together, these factors improve well placement, prevent and mitigate the danger of collision with existing wellbores and enable real-time steering to save rig-time and reduce drilling costs. Copyright 2012, IADC/SPE Drilling Conference and Exhibition.

AB - Earth's gravity and magnetic fields are used as natural reference frames in directional drilling. The azimuth of the bottomhole assembly is inferred by comparing the magnetic field measured-while-drilling (MWD) with a geomagnetic reference model. To provide a reference of sufficient quality for accurate well placement, the US National Geophysical Data Center (NGDC), in partnership with industry, has developed high-definition geomagnetic models (HDGM), updated regularly using the latest satellite, airborne and marine measurements of the Earth's magnetic field. Standard geomagnetic reference models represent the main magnetic field originating in the Earth's liquid core, but the new models additionally account for crustal magnetic anomalies, which constitute a significant source of error in directional drilling. NGDC maintains a public archive of global ship and airborne magnetic field measurements. These are compiled into a global magnetic anomaly grid and expanded into ellipsoidal harmonics. The harmonic expansion coefficients are then included in the high-definition models to accurately represent the direction and strength of the local geomagnetic field. The latest global model to degree and order 720 resolves magnetic anomalies down to 28 km half-wavelength, achieving more than an order-of-magnitude improvement over previous models. A side-by-side comparison of different on- and off-shore regions shows the high level of local detail represented in the new model. Accounting for a larger waveband of the geomagnetic spectrum significantly improves the accuracy of the reference field. This directly benefits the reliability of the well azimuth determination. We further demonstrate that model accuracy is a prerequisite for applying drill string interference corrections. Finally, an accurate reference model facilitates the validation of MWD surveys by keeping the field acceptance criteria centered on the true downhole magnetic field. Together, these factors improve well placement, prevent and mitigate the danger of collision with existing wellbores and enable real-time steering to save rig-time and reduce drilling costs. Copyright 2012, IADC/SPE Drilling Conference and Exhibition.

KW - Directional drilling

KW - Exhibitions

KW - Geomagnetism

KW - Magnetic fields

KW - Models

KW - Oil field equipment

KW - Well drilling

KW - Magnetic field measurement

UR - http://www.onepetro.org/mslib/servlet/onepetropreview?id=SPE-151436-MS

U2 - 10.2118/151436-MS

DO - 10.2118/151436-MS

SN - 978-1-61399-186-2

BT - IADC/SPE Drilling Conference and Exhibition

T2 - IADC/SPE Drilling Conference and Exhibition

SP - 151436-MS

ER -