-
11.发明公开公开(公告)号：US20230236332A1
公开(公告)日：2023-07-27
申请号：US18130751
申请日：2023-04-04
Applicant: PGS GEOPHYSICAL AS
Inventor： Magnus Wangensteen , Christian Strand , Bertrand Caselitz , Edwin Hodges , Didier Lecerf
CPC classification number: G01V1/308 , G01V1/38 , G01V2210/1212 , G01V2210/612
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：US10571589B2
公开(公告)日：2020-02-25
申请号：US15627508
申请日：2017-06-20
Applicant: PGS Geophysical AS
Inventor： Manuel Beitz , Christian Strand , Rolf Huibert Baardman
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：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.
-
公开(公告)号：US09903969B2
公开(公告)日：2018-02-27
申请号：US14594952
申请日：2015-01-12
Applicant: PGS Geophysical AS
Inventor： Bengt Boberg , Sverre Olsen , Christian Strand
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.
-
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
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.
-
Patent Agency Ranking
公开(公告)号：US11604300B2
公开(公告)日：2023-03-14
申请号：US16743664
申请日：2020-01-15
Applicant: PGS Geophysical AS
Inventor： Manuel Beitz , Christian Strand , Rolf Huibert Baardman
Abstract: Systems and computer readable media are described that actuate at least one marine seismic source according to a constrained sequence. The sequence exhibits an actuation time or distance interval between each actuation. The actuation time or distance interval corresponds to the sum of a nominal time or distance and a respective dither time or dither distance for each actuation. The sequence is constrained such that differences between consecutive dither times or dither distances remain within a threshold dither difference. Constraining the sequence according to the threshold dither difference enables increased bottom speeds for the source (i.e., increased speeds of the source relative to the seafloor), while still maintaining at least a minimum actuation time or distance interval for the source, taking into account both the nominal time or distance and the respective dither times or dither differences.
-
17.发明授权公开(公告)号：US11474269B2
公开(公告)日：2022-10-18
申请号：US16905544
申请日：2020-06-18
Applicant: PGS GEOPHYSICAL AS
Inventor： Christian Strand , Rick Irving , Magnus Wangensteen , Dan Allison
Abstract: Numerous techniques and apparatus are disclosed relating to the performance of 4D marine geophysical surveys over at least first and second areas covered, respectively, by first and second preexisting baseline surveys. Performing the monitor surveys may include deploying a monitor survey streamer layout that can be used to repeat streamer positions of both the first and the second preexisting baseline surveys, and using the monitor survey streamer layout to perform the monitor survey over the first and second areas in a manner that repeats all streamer positions of the first preexisting baseline survey when over the first area, and that repeats all streamer positions of the second preexisting baseline survey when over the second area. Streamer layouts corresponding to the first and second preexisting baseline surveys may differ in at least one of the following characteristics: streamer separation or total number of streamers.
-
公开(公告)号：US20210349228A1
公开(公告)日：2021-11-11
申请号：US17254132
申请日：2019-06-21
Applicant: PGS Geophysical AS
Inventor： Christian Strand , Edwin Hodges
IPC: G01V1/38
Abstract: Techniques are disclosed relating to performing marine surveys according to dither values generated based on one or more dithering constraints. This may include for example, determining a set of nominal shot points for a marine seismic energy source and determining dither values for ones of the nominal shot points. In some embodiments, the dither values are randomly generated, subject to a duplication constraint such that at most a threshold number of dither differences between consecutive shot points that fall within discrete ranges. In some embodiments, actual shot points are determined for the planned sail line based on application of the determined dither values to the nominal shot points. In various embodiments, the disclosed techniques may facilitate a separate de-blending procedure to separate signals from the marine seismic energy source and signals from one or more other seismic energy sources to be used for the seismic survey.
-
公开(公告)号：US20210055440A1
公开(公告)日：2021-02-25
申请号：US17068648
申请日：2020-10-12
Applicant: PGS Geophysical AS
Inventor： Manuel Beitz , Christian Strand
IPC: G01V1/38
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：US12111438B2
公开(公告)日：2024-10-08
申请号：US18130751
申请日：2023-04-04
Applicant: PGS GEOPHYSICAL AS
Inventor： Magnus Wangensteen , Christian Strand , Bertrand Caselitz , Edwin Hodges , Didier Lecerf
CPC classification number: G01V1/308 , G01V1/38 , G01V2210/1212 , G01V2210/612
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.
-
-
-
-
-
-
-
-
-
Search Results
27
records
(took 0.017 seconds)
