Noise attentuation using a dipole sparse Tau-p inversion

US9651697B2 · kind B2 · utility

Assignee

• CGG SERVICES SAS · FR

Inventors

• Ping WANG · Sugar Land, US
• Suryadeep Ray · Houston, US
• Zhigang Zhang · Hunan, CN

Key dates

• Filing date: Mar 24, 2015
• Grant date: May 16, 2017
• Expiry date: Mar 24, 2035

Classification

• Technology area (CPC G): Physics
• CPC primary: G01V2210/47
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An input seismic data set is obtained, and a first inversion is conducted on a first frequency filtered input seismic data set across all slowness values in the plurality of slowness values using an inversion matrix with dipole modulation containing a plurality of Tau-p operators and a plurality of dipole terms to transform the first frequency filtered input seismic data set from a time domain to a Tau-p domain having a plurality of first inversion Tau-p coefficients. Each Tau-p coefficient associated with one of the plurality of slowness values. The first inversion Tau-p coefficients are used to identify a subset of slowness values from the plurality of slowness values, and iterative sparse Tau-p inversion using the identified subset of slowness values is performed. The input seismic data set is modified to generate a noise attenuated seismic data set based on the iterative sparse Tau-p inversion.