The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 08, 2020
Filed:
Jan. 09, 2018
Pgs Geophysical As, Oslo, NO;
Truong Nguyen, Thames Ditton, GB;
Richard Dyer, Guildford, GB;
PGS Geophysical AS, Oslo, NO;
Abstract
Techniques are disclosed relating to reducing noise in geophysical marine survey data through use of a dip map data structure. Such techniques may include adapting a model of multiple noise to seismic data. A multiple dip map may be generated by convolving the adapted model of multiple noise with a set of directional filters. A modified record of the seismic data may be generated through adaptive subtraction that is sufficient to remove most multiple events but may also damage at least some primary events. A primary dip map may then be determined from the modified record by interpolation dependent on the multiple dip map. A noise template may then be adaptively subtracted from the seismic data. Prior to the adaptive subtraction, the noise template is adapted to the seismic data by a degree of adaptation that is determined dependent upon relative amplitudes of the primary and multiple dip maps.