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公开(公告)号：US20240192392A1
公开(公告)日：2024-06-13
申请号：US18430918
申请日：2024-02-02
申请人： CGG SERVICES SA
发明人： Gordon POOLE
CPC分类号： G01V1/36 , G01V1/282 , G01V1/30 , G01V1/38 , G01V2210/1293 , G01V2210/1423 , G01V2210/32 , G01V2210/47 , G01V2210/56
摘要： Computing device, computer instructions and method for processing input seismic data d associated with a surveyed subsurface. The method includes: receiving the input seismic data d recorded in a first domain by seismic receivers that travel in water, the input seismic data d including pressure data and particle motion data; generating a model p in a second domain, which is different from the first domain, to describe the input seismic data d; processing the model p to generate an output seismic dataset with attenuated noise; and generating an image of the surveyed subsurface based on the output seismic dataset.
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公开(公告)号：US11994640B2
公开(公告)日：2024-05-28
申请号：US16835015
申请日：2020-03-30
申请人： PGS Geophyscial AS
发明人： Stian Hegna , Tilman Klüver
CPC分类号： G01V1/345 , G01V1/364 , G01V2210/56
摘要： Processes and systems for imaging a subterranean formation using continuously recorded seismic data obtained during a marine seismic geophysical survey of the subterranean formation are described herein. The processes and systems compute upgoing pressure data at stationary-receiver locations, and low-frequency noise attenuation processes and systems are applied to the upgoing pressure wavefield data to obtain low-frequency noise attenuated upgoing pressure wavefield data. An image of the subterranean formation, or data indicative thereof, may be generated using the low-frequency noise attenuated upgoing pressure wavefield data at stationary-receiver locations.
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公开(公告)号：US20230367027A1
公开(公告)日：2023-11-16
申请号：US18220237
申请日：2023-07-10
发明人： Gary Hampson , Amarjeet Kumar , Tom Rayment
CPC分类号： G01V1/364 , G01V1/3808 , G01V1/303 , G01V2210/56
摘要： A method for estimating noise in particle motion seismic recordings and upgoing (deghosted) and downgoing components of ecorded wavefields includes inputting pressure related and particle motion related seismic signals. A sparsity promoting transformation is applied to the input seismic signals. A matrix à and column vector {tilde over (b)} are constructed according to the expression:
A
~
=
(
I
I
0
I
-
I
λ
I
)
x
~
=
(
d
u
n
)
b
~
=
(
A
-
1
p
A
-
1
z
)
,
wherein d represents a down-going seismic wavefield, u represents an up-going seismic wavefield, n represents the noise and λ represents a user-chosen scalar to adjust emphasis of the noise. A constrained minimization is solved according to the expression
x
~
=
arg
min
μ
x
~
1
+
1
2
x
~
2
2
st
A
~
x
~
=
b
~
for {tilde over (x)}; wherein μ represents a user-chosen scalar to adjust relative importance of minimization norms. The solved constrained minimization is inverse transformed and reordered back into a domain of the input seismic signals. An output is generated comprising an estimate of the noise contained in the particle motion recording, the downgoing wavefield and the upgoing (deghosted) wavefield.-
公开(公告)号：US09964655B2
公开(公告)日：2018-05-08
申请号：US14668012
申请日：2015-03-25
发明人： Philippe Caprioli , Robin Fletcher , Xiang Du
CPC分类号： G01V1/364 , G01V1/282 , G01V1/38 , G01V2210/20 , G01V2210/51 , G01V2210/56 , G01V2210/74
摘要： A technique includes determining an image of a subsurface geologic region of interest, where the image represents at least in part ghost energy that is attributable to reflections caused by a reflecting interface. The technique includes deghosting the image, which includes processing data representing the image in a processor-based machine to determine at least one impulse response of a modeling and migration of at least one point scatterer for the region and use the impulse response(s) to attenuate the ghost energy.
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公开(公告)号：US09915745B2
公开(公告)日：2018-03-13
申请号：US15084748
申请日：2016-03-30
申请人： PGS Geophysical AS
发明人： Stian Hegna , Tilman Kluver
CPC分类号： G01V1/364 , G01V1/36 , G01V1/38 , G01V1/3808 , G01V2210/56
摘要： At least some embodiments are directed to a system. The system includes a processor and a memory coupled to the processor. The memory stores a program that, when executed by the processor, causes the processor to calculate a pressure response of a first sensor, and correct pressure wavefield data obtained from the first sensor responsive to a first acoustic wavefield. The correction is based on the calculated pressure response of the first sensor. The pressure response of the first sensor is responsive to a second acoustic wavefield having a propagation path between a source of the second acoustic wavefield and the first sensor, in which the propagation path includes no reflection from a subsurface formation.
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公开(公告)号：US09829590B2
公开(公告)日：2017-11-28
申请号：US15084830
申请日：2016-03-30
发明人： Bob A. Hardage
CPC分类号： G01V1/286 , G01V1/38 , G01V1/42 , G01V2210/125 , G01V2210/1297 , G01V2210/1427 , G01V2210/56
摘要： A system and method of processing seismic data obtained using a plurality of towed single-component receivers in a marine environment is described, the towed single-component receivers configured to measure compressional P waves. The method comprises retrieving seismic data from a storage device, the seismic data comprising P-P data and shear mode data, wherein the P-P data and shear mode data were both received at the towed single-component receivers configured to measure compressional P waves to generate the seismic data. The method further comprises processing the seismic data to extract SV-P shear mode data and generating shear mode image data based on the extracted shear mode data.
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公开(公告)号：US09791581B2
公开(公告)日：2017-10-17
申请号：US14891765
申请日：2014-06-06
申请人： CGG SERVICES SA
发明人： Risto Siliqi , Karine Desrues
CPC分类号： G01V1/364 , G01V1/201 , G01V1/362 , G01V1/3808 , G01V2210/56
摘要： A marine streamer spread for acquiring seismic data, the spread including a streamer having a first portion and a second portion; the first portion including both first pressure sensors and pressure derivative sensors for acquiring the seismic data; and the second portion including second pressure sensors. The first portion imparts ghost diversity to the seismic data by having a variable-depth profile and the pressure derivative sensors impart polarity diversity to the seismic data.
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公开(公告)号：US20170269245A1
公开(公告)日：2017-09-21
申请号：US15504733
申请日：2015-08-28
申请人： PGS Geophysical AS
发明人： Tilman KLUEVER , Hocine TABTI , Neil TURNBULL
CPC分类号： G01V1/36 , G01V1/32 , G01V1/38 , G01V2210/32 , G01V2210/34 , G01V2210/56
摘要： This disclosure is directed to methods and systems to evaluate noise contend of seismic data received during a marine survey. The seismic data includes pressure and particle motion data generated by collocated pressure and particle motion sensors of a seismic data acquisition system. The pressure and particle motion data are cross ghosted and temporal and spatial wavelet transforms are applied to the cross-ghosted pressure and particle motion data in order to compute pressure energies and particle motion energies in temporal and spatial scales of a temporal and spatial scale domain. The pressure and particle motion energies may be compared to evaluate noise content in the pressure and particle motion data, evaluate changes in the noise content during the marine survey, and adjust marine survey parameters to reduce the noise content.
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公开(公告)号：US20170235002A1
公开(公告)日：2017-08-17
申请号：US15518474
申请日：2015-10-23
申请人： WESTERNGECO LLC
CPC分类号： G01V1/364 , G01V1/325 , G01V1/368 , G01V1/38 , G01V2210/1293 , G01V2210/1423 , G01V2210/21 , G01V2210/44 , G01V2210/56 , G01V2210/57
摘要： Systems, methods, and computer-readable media for estimating a component of a seismic wavefield. The method may include accessing marine seismic data comprising a plurality of discrete measurements of a seismic wavefield; processing the marine seismic data to determine a relationship between a plurality of components of the seismic wavefield and each of the discrete measurements; and estimating from the marine seismic data processed via the one or more processors, each component of the seismic wavefield separated from each of the other plurality of components of the seismic wavefield and evaluated at a predetermined position.
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公开(公告)号：US20170176612A1
公开(公告)日：2017-06-22
申请号：US14975076
申请日：2015-12-18
发明人： Clement Kostov , Scott A. Slaton
CPC分类号： G01V1/282 , G01V1/301 , G01V1/303 , G01V1/36 , G01V1/3808 , G01V2210/1293 , G01V2210/1423 , G01V2210/56 , G01V2210/67
摘要： A method includes receiving a seismic dataset from a survey, wherein the seismic dataset represents a portion of a subsurface geological formation and includes primary and multiple data. The method further includes the steps of conditioning the seismic dataset and estimating a model of the multiple data in the conditioned seismic dataset based on a user-defined parameter to derive a primary data set. Further, the method includes the steps of computing a velocity model from the primary data set using the user-defined parameter and updating the estimated multiple model based at least on a modification of the user-defined parameter. In addition, the method includes the steps of recomputing the primary data and the velocity model based on the modified user-defined parameter and generating an image of the primary data.
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