公开(公告)号：US20190235112A1

公开(公告)日：2019-08-01

申请号：US16379875

申请日：2019-04-10

Applicant: PGS Geophysical AS

Inventor： Tilman Kluver ,  Stian Hegna

IPC: G01V1/36 ,  G01V1/37 ,  G01V1/38 ,  G01V1/48

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：US20190113645A1

公开(公告)日：2019-04-18

申请号：US16154876

申请日：2018-10-09

Applicant: PGS Geophysical AS

Inventor： Stian Hegna ,  Tilman Kluver ,  Jostein Lima

IPC: G01V1/38 ,  G01V1/00

Abstract: Techniques are disclosed relating to performing marine surveys with non-uniform spacing of survey elements in a cross-line direction. This may include, for example, performing a survey pass in a multi-pass survey by towing a plurality of sources and sensors in a towing pattern with non-uniform spacing between adjacent ones of the sources. In some embodiments, the non-uniform spacing between adjacent ones of the sources is determined based on a common mid-point (CMP) spacing parameter for the survey pass in the cross-line direction. The spacing parameter may relate, for example, to difference in average CMP spacing for different parts of the survey spread, variance in CMP spacing, and/or width of the survey spread for which a threshold CMP spacing distance is satisfied. In various embodiments, the disclosed techniques may improve survey resolution and/or accuracy and may require a smaller number of survey passes and/or a reduced amount of survey equipment relative to traditional techniques.

公开(公告)号：US09696445B2

公开(公告)日：2017-07-04

申请号：US13826008

申请日：2013-03-14

Applicant: PGS Geophysical AS

Inventor： Tilman Kluver ,  Anthony James Day

IPC: G01V1/38 ,  G01V1/36

CPC classification number: G01V1/38 ,  G01V1/364 ,  G01V2210/44

Abstract: Computational systems and methods that combine global frequency-wavenumber-domain (“f-k domain”) filters with localized eigenimage based event selection to generate a resulting wavefield with reduced filter imprints on gather edges, reduced noise, and correct treatment of aliased energy are disclosed. The methods are executed by applying filters to the full set of seismic gather data in the f-k domain in order to obtain a resulting wavefield from recorded pressure and/or particle velocity data. The output of the filter is iteratively decomposed according to local dip values using eigenimage processing based on singular value decomposition (“SVD”). The same sample locations are extracted using SVD from the input in addition to generating input for a subsequent iteration with already processed data removed. Eigenimage processing methods allow for correct treatment of spatially aliased energy in f-k domain filtering.

公开(公告)号：US20200271806A1

公开(公告)日：2020-08-27

申请号：US16793093

申请日：2020-02-18

Applicant: PGS Geophysical AS

Inventor： Stian Hegna ,  Tilman Kluver

IPC: G01V1/38

Abstract: An inline source can be used for a marine survey. For example, a marine survey vessel can tow source units in line. The source units can be actuated near-continuously to cause a respective signal emitted by each of the source units to be uncorrelated with signals emitted by other of the source units.

公开(公告)号：US20190293817A1

公开(公告)日：2019-09-26

申请号：US16437128

申请日：2019-06-11

Applicant: PGS Geophysical AS

Inventor： Stian Hegna ,  Tilman Kluver

IPC: G01V1/36

Abstract: Noise can be attenuated in marine seismic data from a marine seismic survey. A first near-continuous measurement of a wavefield and a second near-continuous measurement of the wavefield recorded from a marine seismic survey can be equalized, a coherent portion of the equalized second near-continuous measurement can be collapsed, and a noise model can be derived. The noise model can be subtracted from the second near-continuous measurement.

公开(公告)号：US20160377756A1

公开(公告)日：2016-12-29

申请号：US15084748

申请日：2016-03-30

Applicant: PGS Geophysical AS

Inventor： Stian Hegna ,  Tilman Kluver

IPC: G01V1/36 ,  G01V1/38

CPC classification number: G01V1/364 ,  G01V1/36 ,  G01V1/38 ,  G01V1/3808 ,  G01V2210/56

Abstract: 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.

Abstract translation: 至少一些实施例涉及系统。 该系统包括处理器和耦合到处理器的存储器。 存储器存储程序，当由处理器执行时，使处理器计算第一传感器的压力响应，并且响应于第一声波场来校正从第一传感器获得的压力波场数据。 校正是基于计算出的第一传感器的压力响应。 第一传感器的压力响应响应于具有第二声波波段的源和第一传感器之间的传播路径的第二声波场，其中传播路径不包括来自地下地层的反射。

公开(公告)号：US11125900B2

公开(公告)日：2021-09-21

申请号：US16379875

申请日：2019-04-10

Applicant: PGS Geophysical AS

Inventor： Tilman Kluver ,  Stian Hegna

IPC: G01V1/36 ,  G01V1/37 ,  G01V1/38 ,  G01V1/48

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：US10338255B2

公开(公告)日：2019-07-02

申请号：US15412135

申请日：2017-01-23

Applicant: PGS Geophysical AS

Inventor： Stian Hegna ,  Tilman Kluver

IPC: G01V1/36 ,  G01V1/28 ,  G01V1/38

Abstract: Noise can be attenuated in marine seismic data from a marine seismic survey. A first near-continuous measurement of a wavefield and a second near-continuous measurement of the wavefield recorded from a marine seismic survey can be equalized, a coherent portion of the equalized second near-continuous measurement can be collapsed, and a noise model can be derived. The noise model can be subtracted from the second near-continuous measurement.

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：US20140269183A1

公开(公告)日：2014-09-18

申请号：US13826008

申请日：2013-03-14

Applicant: PGS GEOPHYSICAL AS

Inventor： Tilman Kluver ,  Anthony James Day

IPC: G01V1/38

CPC classification number: G01V1/38 ,  G01V1/364 ,  G01V2210/44

Abstract: Computational systems and methods that combine global frequency-wavenumber-domain (“f-k domain”) filters with localized eigenimage based event selection to generate a resulting wavefield with reduced filter imprints on gather edges, reduced noise, and correct treatment of aliased energy are disclosed. The methods are executed by applying filters to the full set of seismic gather data in the f-k domain in order to obtain a resulting wavefield from recorded pressure and/or particle velocity data. The output of the filter is iteratively decomposed according to local dip values using eigenimage processing based on singular value decomposition (“SVD”). The same sample locations are extracted using SVD from the input in addition to generating input for a subsequent iteration with already processed data removed. Eigenimage processing methods allow for correct treatment of spatially aliased energy in f-k domain filtering.

Abstract translation: 公开了将全局频率 - 波数域（“f-k域”）滤波器与基于局部特征图像的事件选择相结合的计算系统和方法，以在收集边缘上减少滤波器印记，降低噪声和对混叠能量的正确处理产生结果波场。 通过对f-k域中的全部地震采集数据应用滤波器来执行这些方法，以便从记录的压力和/或粒子速度数据获得所得到的波场。 使用基于奇异值分解的特征图像处理（“SVD”），根据局部dip值迭代地分解滤波器的输出。 除了为已经处理的数据移除的后续迭代生成输入之外，使用SVD从输入中提取相同的采样位置。 特征图像处理方法允许在f-k域过滤中正确处理空间混叠能量。