公开(公告)号：US20180321406A1

公开(公告)日：2018-11-08

申请号：US15967969

申请日：2018-05-01

Applicant: PGS Geophysical AS

Inventor： Christian Strand ,  Manuel Beitz ,  Okwudili Orji ,  Averrouz Mostavan ,  Stig Rune Lennart Tenghamn ,  Anders Göran Mattsson

IPC: G01V1/38

CPC classification number: G01V1/3808 ,  G01V1/006 ,  G01V1/3843 ,  G01V1/3861 ,  G01V2210/127

Abstract: Techniques are disclosed relating to geophysical surveying. In some embodiments, a marine survey vessel tows multiple sensor streamers including a group of four innermost streamers in a cross-line direction relative to a centerline of tow. In some embodiments, the vessel tows two or more vibratory sources between two outermost streamers in the first group, in a cross-line direction. In some embodiments, the two or more sources are simultaneously operated using different codes that are uncorrelated to at least a threshold degree. Various disclosed narrow-tow techniques may allow increased streamer separation without reducing cross-line bin size and/or reduce cross-line bin size for a given streamer separation, relative to conventional techniques.