Method and system for suppressing swell-induced electromagnetic noise

US9274241B2 · kind B2 · utility

Assignee

• PGS Geophysical AS · NO

Inventors

• Ulf Peter Lindqvist · Stuvsta-Snättringe, SE
• Andras Robert Juhasz · Stockholm, SE
• Rune Johan Magnus Mattsson · Skärhamn, SE
• Lars Erik Magnus Björnemo · Sollentuna, SE

Key dates

• Filing date: Mar 14, 2013
• Grant date: Mar 1, 2016
• Expiry date: Mar 13, 2034

Classification

• Technology area (CPC G): Physics
• CPC primary: G01V3/15
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Disclosed are methods and systems for suppression of noise in electromagnetic surveying that includes stacking two or more frames of electromagnetic data. An example embodiment discloses a method for suppressing swell-induced noise in an electromagnetic survey, comprising: measuring an electromagnetic field parameter at one or more positions to provide an electromagnetic signal, the electromagnetic signal comprising a swell-induced portion; and stacking two or more frames of the electromagnetic signal to provide a stacked signal in which the swell-induced portion is suppressed, wherein the swell-induced portion is out of phase between the two or more frames.