公开(公告)号：US11874421B2

公开(公告)日：2024-01-16

申请号：US17068648

申请日：2020-10-12

Applicant: PGS Geophysical AS

Inventor： Manuel Beitz ,  Christian Strand

IPC: G01V1/38 ,  G01V1/18

CPC classification number: G01V1/3808 ,  G01V1/3843 ,  G01V1/181 ,  G01V1/186 ,  G01V2210/127 ,  G01V2210/1212 ,  G01V2210/1293 ,  G01V2210/1423 ,  G01V2210/165

Abstract: Techniques and apparatus are disclosed for performing marine seismic surveys. In some embodiments, one or more vessels are used to tow a set of streamers and two or more sources such that a first set of sources consists of all those that are disposed within a first threshold distance from the streamers, and a second set of sources consists of all those that are disposed beyond a second, greater, threshold distance from the streamers. Sources in the first set are activated more frequently than sources in the second set are activated.

公开(公告)号：US20220091293A1

公开(公告)日：2022-03-24

申请号：US17189128

申请日：2021-03-01

Applicant: PGS GEOPHYSICAL AS

Inventor： Magnus Wangensteen ,  Christian Strand ,  Bertrand Caselitz ,  Edwin Hodges ,  Didier Lecerf

IPC: G01V1/30 ,  G01V1/38

Abstract: Methods and apparatus are described for performing a 4D monitor marine seismic survey that repeats a previous survey. A number of sources may be used during the 4D monitor survey that differs from a number of sources that were used during the previous survey. Shot points from the previous survey are repeated by the 4D monitor survey, and additional shot points may be produced during the 4D monitor survey that were not produced during the previous survey. Embodiments enable efficiency and data quality improvements to be captured during 4D survey processes, while preserving repeatability.

公开(公告)号：US10969509B2

公开(公告)日：2021-04-06

申请号：US16000542

申请日：2018-06-05

Applicant: PGS Geophysical AS

Inventor： Manuel Beitz ,  Christian Strand

IPC: G01V1/38 ,  G01V1/00

Abstract: Techniques are disclosed relating to geophysical surveying. In some embodiments, a marine survey vessel tows multiple sensor streamers in addition to vibratory sources deployed relative to the sensor streamers. In some embodiments, the vessel tows vibratory sources emitting energy within different frequency bands in different deployment zones. In some embodiments, one or more sources are driven with different sweep functions, different activation patterns, and/or different sweep lengths. Various disclosed techniques for manufacturing a geophysical data product may potentially simplify equipment used for towing sources, reduce survey complexity without reducing resolution, increase resolution without increasing survey complexity, improve energy content recovered from deep reflections, and/or reduce the environmental impact of emitting seismic energy.

公开(公告)号：US20190056522A1

公开(公告)日：2019-02-21

申请号：US16055943

申请日：2018-08-06

Applicant: PGS Geophysical AS

Inventor： Stig Rune Lennart Tenghamn ,  Manuel Beitz ,  Christian Strand

IPC: G01V1/38

Abstract: Techniques are disclosed relating to geophysical surveying. In various embodiments, a computer system may access seismic data for a geological formation, where the seismic data is recorded, using one or more sensors, during a seismic survey in which a first vibratory source was driven using a first digital code for at least a first time interval. The first digital code, in some embodiments, may include a first plurality of subsections corresponding to portions of the first time interval. In some embodiments, the computer system may image a first location of the geological formation using a correlation of only a first sub-section of the first plurality of sub-sections with the seismic data. Further, in some embodiments, the computer system may image a second location of the geological formation using a correlation of two or more of the first plurality of sub-sections with the seismic data.

公开(公告)号：US20180164457A1

公开(公告)日：2018-06-14

申请号：US15823221

申请日：2017-11-27

Applicant: PGS Geophysical AS

Inventor： Manuel Beitz ,  Christian Strand

IPC: G01V1/38 ,  G01V1/18

Abstract: Techniques are disclosed relating to configuring a marine seismic survey. In some embodiments, a vessel may be coupled to one or more seismic sources and one or more seismic streamers, and a second vessel may be coupled to one or more far offset seismic sources. The near offset sources may be configured to actuate according to a shot point interval; the far offset sources may be configured to actuate according to a longer shot point interval. In some embodiments, the longer shot point interval may be a multiple of the near offset source shot point interval. Determining the first and second shot point intervals may be based in part on, for example, the wave frequencies of the far offset sources, the requirements of a full wave inversion process, or various configurational parameters of seismic surveys.

公开(公告)号：US20180052248A1

公开(公告)日：2018-02-22

申请号：US15627508

申请日：2017-06-20

Applicant: PGS Geophysical AS

Inventor： Manuel Beitz ,  Christian Strand ,  Rolf Huibert Baardman

IPC: G01V1/38

Abstract: A system for constraining a dither time can comprise a source and a controller coupled to the source. The controller can be configured to actuate the source in sequence, while the source is moving through a fluid volume at a bottom speed, with an actuation time interval between each actuation comprising a sum of a nominal time and a dither time for each actuation and constrain the dither time for each actuation such that a reduction of the actuation time interval relative to a directly precedent actuation time interval is at most a threshold dither time difference, wherein the threshold dither time difference corresponds to a maximum bottom speed.

公开(公告)号：US20160202377A1

公开(公告)日：2016-07-14

申请号：US14594952

申请日：2015-01-12

Applicant: PGS Geophysical AS

Inventor： Bengt Boberg ,  Sverre Olsen ,  Christian Strand

IPC: G01V1/38 ,  G01V1/28 ,  G01V1/18

CPC classification number: G01V1/3808 ,  G01V1/18 ,  G01V1/28 ,  G01V1/3826 ,  G01V2200/14

Abstract: Techniques are disclosed relating to geophysical surveying. In some embodiments, an added unique fold parameter is determined for one or more bins during a survey of a geophysical formation. In some embodiments, the position of one or more elements of a survey system is adjusted based on the added unique fold. In some embodiments, a ratio of the determined added unique fold to a theoretically obtainable added unique fold is determined, and the adjustment may be based on this ratio. In some embodiments, an acceptability parameter is also considered. In some embodiments, survey elements may be steered to increase added unique fold without leaving coverage holes that violate an acceptability criterion. In some embodiments, the steering is performed automatically. In some embodiments, coverage parameters are graphically displayed to an operator.

Abstract translation: 公开了与地球物理测量有关的技术。 在一些实施例中，在地球物理地层的测量期间，为一个或多个箱确定添加的独特折叠参数。 在一些实施例中，基于添加的唯一折叠来调整测量系统的一个或多个元件的位置。 在一些实施例中，确定所确定的添加的唯一折叠与理论上可获得的添加的唯一折叠的比率，并且可以基于该比率进行调整。 在一些实施例中，也考虑可接受性参数。 在一些实施例中，调查元件可以被引导以增加附加的唯一折叠，而不会留下违反可接受性标准的覆盖孔。 在一些实施例中，自动执行转向。 在一些实施例中，覆盖参数以图形方式显示给操作者。