Method and system for determining source signatures after source ghost removal

US9411062B2 · kind B2 · utility

Assignee

• PGS Geophysical AS · NO

Inventors

• Gregory Ernest Parkes · Corsham, GB
• Stian Hegna · Tvedestrand, NO

Key dates

• Filing date: Feb 7, 2012
• Grant date: Aug 9, 2016
• Expiry date: Jun 12, 2035

Classification

• Technology area (CPC G): Physics
• CPC primary: G01V2210/56
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Seismic data are acquired using a seismic source comprising a plurality of seismic sub-sources disposed in a body of water at a plurality of depths and activated with different time delays. Far-field signatures are determined for the plurality of seismic sub-sources at each of the plurality of depths. A composite ghost-free far-field signature of the seismic source is determined from the far-field signatures for the plurality of seismic sub-sources at each of the plurality of depths and different time delays. A source response is removed from the seismic data using the far-field signatures of the seismic source.