ENHANCED WELLBORE PLACEMENT ACCURACY USING GEOMAGNETIC IN-FIELD REFERENCING AND MULTI STATION CORRECTION

 


IFR models are computed from high-resolution satellite and aeromagnetic measurements of the geomagnetic field. A new constellation of low-orbiting satellites provides accurate specification of the long-wavelength geomagnetic field.

This information is complemented by local high-resolution airborne magnetic surveys. Once the natural geomagnetic field is accurately specified by IFR, magnetic interference from the drill string can be removed by the Multi-Station correction.

This paper highlights the benefits of IFR and MS corrections on specific examples from Texas and North Dakota.

Azimuth corrections of 1 degree lead to changes in wellbore position of 200 feet and more at TD. Improved specification of the strength and dip of the geomagnetic field further enables tighter quality control of MWD surveys. The improved accuracy of the IFR+MS technique is quantified in the new set of Operator Wellbore Survey Group (OWSG) tool code MWD+IFR+MS.

This tool code reduces ellipses of uncertainty by about 50%, thereby facilitating well planning and enabling closer spaced laterals and in-fill drilling.

To know more visit us here: https://bit.ly/47n0Z3N or you can also contact us here: https://www.helmerichpayne.com/contact.


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