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公开(公告)号：US12105239B2
公开(公告)日：2024-10-01
申请号：US17463784
申请日：2021-09-01
申请人： PGS Geophysical AS
CPC分类号： G01V1/3808 , G01V1/30 , G01V1/38 , G01V1/3843 , G01V2210/1293 , G01V2210/1423
摘要： A method and apparatus for marine surveying includes: towing sources in a wide-tow source geometry; towing streamers that comprise receivers; actuating at least one of the sources to create a signal; and detecting the signal with a first receiver, wherein: at least one of the source separations or the streamer separations is non-uniform, and the sources and the receivers provide a regular sampling grid for the survey area. A system includes a survey plan; sources in a wide-tow source geometry; and streamers comprising receivers, wherein: at least one of the source separations or the streamer separations is non-uniform, and the sail lines, sources, and receivers provide uniform CMP coverage for the survey area. A method includes operating a system in a survey area, the system having a non-uniform configuration with wide-tow source geometry; actuating at least one source to create a signal; and detecting the signal with a first receiver.
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公开(公告)号：US20240168192A1
公开(公告)日：2024-05-23
申请号：US18390415
申请日：2023-12-20
申请人： PGS Geophysical AS
CPC分类号： G01V1/3808 , G01V1/005 , G01V1/3861 , G01V1/3843 , G01V2210/127 , G01V2210/1293
摘要： 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.
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公开(公告)号：US11555938B2
公开(公告)日：2023-01-17
申请号：US16716847
申请日：2019-12-17
申请人： PGS Geophysical AS
摘要： An actuation location for actuation of a first source coupled to a first marine survey vessel relative to a position of a second marine survey vessel towing a receiver to enhance illumination of a subsurface location can be determined based on a survey route of the second marine survey vessel and a priori data of the subsurface location. The first marine survey vessel can be navigated along a survey route of the first marine survey vessel to the actuation location during a marine survey by changing at least a cross-line position or an in-line position of the first marine survey vessel relative to the survey route of the second marine survey vessel.
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公开(公告)号：US11294083B2
公开(公告)日：2022-04-05
申请号：US16055943
申请日：2018-08-06
申请人： PGS Geophysical AS
摘要： 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.
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公开(公告)号：US11852770B2
公开(公告)日：2023-12-26
申请号：US16656288
申请日：2019-10-17
申请人： PGS Geophysical AS
CPC分类号： G01V1/3808 , B63B35/68
摘要： Techniques are disclosed relating to marine geophysical surveys. Various output characteristics of a vibratory source may be modified based on whether a source is targeting an identified portion of a survey area. The portion of the survey area may be detected during the survey or may be pre-identified. In some embodiments, a survey system drives a vibratory source using digital codes having different lengths based on whether the source is targeting an identified portion of a survey area. The disclosed techniques may improve imaging of geology under certain types of formations or may reduce environmental impact, in various embodiments.
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公开(公告)号：US11662491B2
公开(公告)日：2023-05-30
申请号：US17189128
申请日：2021-03-01
申请人： PGS GEOPHYSICAL AS
CPC分类号： G01V1/308 , G01V1/38 , G01V2210/1212 , G01V2210/612
摘要： 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.
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公开(公告)号：US11119230B2
公开(公告)日：2021-09-14
申请号：US16055856
申请日：2018-08-06
申请人： PGS Geophysical AS
摘要： Techniques are disclosed relating to geophysical surveying. In various embodiments, a marine survey vessel may tow a plurality of streamers that each include a plurality of seismic sensors. Further, the survey vessel may tow a plurality of vibratory sources. In various embodiments, a first sweep may be performed, using one or more of the plurality of vibratory sources, for a first time interval. Further, in various embodiments, disclosed techniques may include recording, during the first time interval using the plurality of seismic sensors, seismic data on a tangible, computer-readable medium, thereby creating a geophysical data product.
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公开(公告)号：US20200150303A1
公开(公告)日：2020-05-14
申请号：US16743664
申请日：2020-01-15
申请人： PGS Geophysical AS
摘要： 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.
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公开(公告)号：US20190056521A1
公开(公告)日：2019-02-21
申请号：US16055856
申请日：2018-08-06
申请人： PGS Geophysical AS
摘要： Techniques are disclosed relating to geophysical surveying. In various embodiments, a marine survey vessel may tow a plurality of streamers that each include a plurality of seismic sensors. Further, the survey vessel may tow a plurality of vibratory sources. In various embodiments, a first sweep may be performed, using one or more of the plurality of vibratory sources, for a first time interval. Further, in various embodiments, disclosed techniques may include recording, during the first time interval using the plurality of seismic sensors, seismic data on a tangible, computer-readable medium, thereby creating a geophysical data product.
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公开(公告)号：US20180364384A1
公开(公告)日：2018-12-20
申请号：US16000542
申请日：2018-06-05
申请人： PGS Geophysical AS
发明人： Manuel Beitz , Christian Strand
IPC分类号： G01V1/38
摘要： 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.
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