公开(公告)号：US12111439B2

公开(公告)日：2024-10-08

申请号：US17323739

申请日：2021-05-18

Applicant: Magseis FF LLC

Inventor： Graham Gillott

IPC: G01V1/38 ,  B63B21/66

CPC classification number: G01V1/3808 ,  B63B21/66 ,  B63B2211/02 ,  G01V2210/1293 ,  G01V2210/1423 ,  G01V2210/64

Abstract: A seabed object detection system is provided. The system can include a receiver array. The receiver array can include a plurality of receivers disposed on a plurality of streamers. The plurality of streamers can include a central port side streamer, a central starboard side streamer, an auxiliary port side streamer and an auxiliary starboard side streamer. The system can include a source array. The source array can include a plurality of sources. The plurality of sources can include a central port side source, a central starboard side source, an auxiliary port side source, and an auxiliary port side streamer.

公开(公告)号：US11802986B2

公开(公告)日：2023-10-31

申请号：US16892557

申请日：2020-06-04

Applicant: PGS Geophysical AS

Inventor： Manuel Beitz ,  Martin Widmaier ,  Andrew Long

IPC: G01V1/38

CPC classification number: G01V1/3852 ,  G01V1/3808 ,  G01V2210/1293 ,  G01V2210/165

Abstract: Methods for performing a marine survey of a subterranean formation using a hybrid combination of ocean bottom seismic (“OBS”) receivers, wide towed sources, and moving streamers are described herein. In one aspect, a sail line separation in a crossline direction is determined based on an average streamer separation and number of streamers. An array of OBS receivers are deposited on a surface of a subterranean formation with an OBS receiver separation that is based on the sail line separation. Wide towed sources and streamers are towed above the array of OBS receivers behind a survey vessel that travels sail lines separated by the sail line separation. The wide towed sources may be activated above the array of OBS receivers. Wavefields reflected from the subterranean formation are recorded at the OBS receivers and receivers located in the streamers as seismic data.

公开(公告)号：US11644594B2

公开(公告)日：2023-05-09

申请号：US16940829

申请日：2020-07-28

Applicant: PGS Geophysical AS

Inventor： Christian Strand

IPC: G01V1/38 ,  G01V1/137 ,  G01V1/00

CPC classification number: G01V1/3861 ,  G01V1/006 ,  G01V1/137 ,  G01V1/38 ,  G01V1/3808 ,  G01V2210/127 ,  G01V2210/1293

Abstract: A method and apparatus for marine surveying. A system includes: a standard-volume source element; a large-volume source element comprising an airgun having a volume greater than 1200 cubic inches; and a long-offset survey streamer. A method includes: towing a standard-volume source element; and towing a large-volume source element; activating the large-volume source element at large shotpoint intervals; and activating the standard-volume source element at standard shotpoint intervals, wherein the large shotpoint intervals are at least twice as long as the standard shotpoint intervals. A method includes: obtaining geophysical data for a subterranean formation; and processing the geophysical data to produce an image of the subterranean formation. A method includes: obtaining a firing plan for a plurality of seismic sources, wherein: a first seismic source of the plurality comprises a large-volume source element, and a second seismic source of the plurality consists of standard-volume source elements.

公开(公告)号：US20190079205A1

公开(公告)日：2019-03-14

申请号：US16185069

申请日：2018-11-09

Applicant: SEISMIC APPARITION GmbH

Inventor： Dirk-Jan Van Manen ,  Fredrik Andersson ,  Johan Robertsson ,  Kurt Eggenberger

IPC: G01V1/32 ,  G01V1/00 ,  G01V1/36

CPC classification number: G01V1/325 ,  G01V1/005 ,  G01V1/364 ,  G01V2210/1293 ,  G01V2210/44

Abstract: Methods are described for separating the unknown contributions of two or more sources from a commonly acquired set of wavefield signals representing a wavefield where the sources traverse general, related activation lines or grids and are synchronously activated while varying at least one parameter between the sources.

公开(公告)号：US20180164460A1

公开(公告)日：2018-06-14

申请号：US15816801

申请日：2017-11-17

Applicant: PGS Geophysical AS

Inventor： Walter F. Söllner

IPC: G01V1/38

CPC classification number: G01V1/3843 ,  G01V1/00 ,  G01V1/133 ,  G01V1/135 ,  G01V1/38 ,  G01V1/3808 ,  G01V2210/1293

Abstract: Disclosed are directed to dipole-type sources and associated methods and systems. A dipole-type source may comprise a first bender plate and a second bender plate. The dipole-type source may further comprise a first cavity coupled to the first bender plate and a second cavity coupled to the second bender plate. The dipole-type source may further comprise one or more drivers in fluid communication with the first cavity and/or the second cavity, wherein the one or more drivers are operable to drive a respective fluid between at least one of the one or more drivers and the first cavity and between at least one of the one or more drivers and the second cavity, such that the first and second bender plate oscillate at least substantially synchronously in the same direction to generate an up-going wave and a down-going wave with opposite polarity.

公开(公告)号：US09984671B1

公开(公告)日：2018-05-29

申请号：US15713909

申请日：2017-09-25

Applicant: Anthony A Ruffa

Inventor： Anthony A Ruffa

IPC: G10K11/00 ,  G10K11/18 ,  G10K9/12 ,  H04R1/24 ,  B06B1/06

CPC classification number: G10K11/008 ,  B06B1/0622 ,  B06B1/0644 ,  G01V1/135 ,  G01V2210/1293 ,  G10K9/08 ,  G10K9/121 ,  G10K11/006 ,  G10K11/18 ,  H04R1/24

Abstract: An acoustic projector is provided with an enclosure having a semi-permeable membrane on one side. High salinity liquid is injected at the enclosure to increase osmotic pressure. Valves thereafter allow free flooding between the enclosure and surrounding seawater to equalize the pressure. Transient pressure in the enclosure generates a pressure pulse that propagates from the semi-permeable membrane. The timing of the injection by salt jets and the free-flooding valves enables a repeatable acoustic pulse at low frequencies and a determinable upper frequency. If the acoustic projector is mounted to be conformal to the hull of a ship; the acoustic projector includes a free-flowing region on one side of a semi-permeable membrane and valves. When the valves are opened; the other side of the membrane is free-flooded. Salt jets inject high salinity liquid into an enclosure to increase pressure with the result of an acoustic pressure pulse.

公开(公告)号：US20170299743A1

公开(公告)日：2017-10-19

申请号：US15446328

申请日：2017-03-01

Applicant: PGS Geophysical AS

Inventor： Tilman Kluver ,  Stian Hegna

IPC: G01V1/36 ,  G01V1/38

CPC classification number: G01V1/36 ,  G01V1/368 ,  G01V1/37 ,  G01V1/3808 ,  G01V1/48 ,  G01V2210/1293 ,  G01V2210/1423 ,  G01V2210/1427 ,  G01V2210/21 ,  G01V2210/24

Abstract: Estimating an earth response can include deconvolving a multi-dimensional source wavefield from near-continuously recorded seismic data recorded at a receiver position. The deconvolving can include spreading the near-continuously recorded seismic data across a plurality of possible source emission angles. The result of the deconvolution can be the earth response estimate.

公开(公告)号：US20170285197A1

公开(公告)日：2017-10-05

申请号：US15475465

申请日：2017-03-31

Applicant: ION Geophysical Corporation

Inventor： Nikolaos Bernitsas

IPC: G01V1/38

CPC classification number: G01V1/3808 ,  G01V2210/1293 ,  G01V2210/1423 ,  G01V2210/169

Abstract: Methods, systems, and apparatuses are disclosed for conducting reconnaissance marine seismic surveys. In one example method of acquiring a marine seismic survey, a plurality of streamers are towed behind an acquisition vessel, the plurality of streamers defining a swath. A source is towed behind the acquisition vessel, and at least one other source is towed outside of the swath of streamers.

公开(公告)号：US09689999B2

公开(公告)日：2017-06-27

申请号：US14550001

申请日：2014-11-21

Applicant: PGS Geophysical AS

Inventor： Didier B. P. Lecerf ,  Nizar Chemingui ,  Alejandro A. Valenciano Mavilio ,  Shaoping Lu

IPC: G01V1/34 ,  G01V1/28 ,  G01V1/38

CPC classification number: G01V1/28 ,  G01V2210/1293 ,  G01V2210/1423 ,  G01V2210/56 ,  G01V2210/57

Abstract: Techniques are disclosed relating to geophysical analysis. In one embodiment, a method includes receiving seismic data for a geophysical formation recorded during a seismic survey using one or more seabed sensors and one or more sources. In this embodiment, the method includes determining a seismic gather for a location in the geophysical formation, modifying the seismic gather by interchanging source-receiver definitions for the seismic gather, and imaging the location using the modified gather. In this embodiment, the imaging uses higher-order reflections recorded in the seismic gather. In some embodiments, the method includes separating up-going and down-going wavefields and separately imaging using the up-going wavefield and the down-going wavefield.

公开(公告)号：US20170108604A1

公开(公告)日：2017-04-20

申请号：US15265072

申请日：2016-09-14

Applicant: PGS Geophysical AS

Inventor： Pierre Turquais ,  Endrias Asgedom ,  Walter Franz Söllner

IPC: G01V1/36 ,  G01V1/38

CPC classification number: G01V1/364 ,  G01V1/38 ,  G01V2210/121 ,  G01V2210/1293 ,  G01V2210/1423 ,  G01V2210/324 ,  G01V2210/34 ,  G01V2210/48

Abstract: Denoising seismic data can include extracting a first plurality of overlapping patches corresponding to a respective seismic data window selected from a plurality of seismic data windows, reshaping the first plurality of overlapping patches into patch vectors, and determining sparse approximations of the patch vectors based on a dictionary and a sparse coefficient vector. Denoising seismic data can also include reshaping the sparse approximations into a respective second plurality of overlapping patches, and constructing a denoised version of at least one of the plurality of seismic data windows using the respective second plurality overlapping patches.