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:
Oct. 29, 2019
Filed:
Nov. 07, 2013
Pgs Geophysical As, Lysaker, NO;
Stian Hegna, Hovik, NO;
PGS Geophysical AS, Oslo, NO;
Abstract
Techniques are disclosed relating to geophysical surveying and data processing using streamers at different depths. In one embodiment, a method includes obtaining geophysical data that is specific to a geophysical formation and representative of: a particle motion signal recorded using sensors at a first depth, a first pressure signal recorded using sensors towed at the first depth, and a second pressure signal recorded using sensors towed at a second, greater depth. In this embodiment the method includes modifying a low-frequency range of the particle motion signal using particle motion information estimated based on the second pressure signal. The modified particle motion signal may then be used to separate up-going and down-going wavefields. In some embodiments, obtaining geophysical data is performed by towing a first streamer at the first depth and a second streamer at the second depth. In some embodiments, the second streamer does not include particle motion sensors.