Noise reduction for total field magnetometer measurements

US10725199B2 · kind B2 · utility

Assignee

• PGS Geophysical AS · NO

Inventors

• Peter Lindqvist · Stuvsta-Snättringe, SE
• Robert Juhasz · Stockholm, SE
• Johan Mattsson · Knivsta, SE

Key dates

• Filing date: Mar 12, 2018
• Grant date: Jul 28, 2020
• Expiry date: Jun 8, 2038

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02A90/30
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method and apparatus for a streamer having a total field magnetometer (“TFM”). A streamer includes a plurality of TFMs in proximity with one another and distributed symmetrically about an axis of the streamer. A streamer includes a first subset of TFMs in a streamer section and in proximity with one another; a second subset in the streamer section and in proximity with one another; wherein the first subset is not in proximity with the second subset. A method includes towing a streamer through a body of water, the streamer comprising first and second TFMs; acquiring magnetic data with the first and the second TFMs; and reducing noise in the data based on at least one of: averaging data from the first and the second TFMs; filtering data from the first and the second TFMs; estimating motion of the first TFM; and estimating rotation of the first TFM.