公开(公告)号：US10670751B2

公开(公告)日：2020-06-02

申请号：US15080729

申请日：2016-03-25

申请人： CGG SERVICES SA

发明人： Botao Qin ,  Gilles Lambare

IPC分类号： G01V1/28 ,  G01V1/30

摘要： A preserved-amplitude RTM-based FWI method is used to obtain an image of an explored subsurface formation. Model data corresponding to detected data is generated using a velocity model of the formation. Residuals representing differences between the modeled data and the detected data are back-propagated to then update the velocity model a local optimization based on a deconvolution formula employing a backward propagating wavefield and a forward propagating wavefield. Geophysical features of the formation are imaged based on the updated velocity model.

公开(公告)号：US10466376B2

公开(公告)日：2019-11-05

申请号：US14889063

申请日：2014-06-02

申请人： CGG SERVICES SA

发明人： Julien Meunier ,  Thomas Bianchi ,  Fabien Espeute

IPC分类号： G01V1/30 ,  G01V1/28 ,  G01V1/32

摘要： Methods and systems for deriving S-wave velocity information from the low-frequency content of ambient noise are described. The ambient noise can be collected on a dedicated record or on a production record associated with the receivers of a three-dimensional seismic survey. The methods and systems use one of a plurality of analysis models selected based on quality factors of the ambient noise data. The methods and systems analyze the data at a plurality of single frequencies then transform the velocity versus frequency data into velocity versus depth data.

公开(公告)号：US10338241B2

公开(公告)日：2019-07-02

申请号：US14945895

申请日：2015-11-19

申请人： CGG SERVICES SA

发明人： Brice Tayart De Borms

IPC分类号： G01V1/04 ,  G01V1/00

摘要： Sweep signals for vibrators used to generate seismic signals for seismic surveys are described. By selecting a certain amount of one or more odd order harmonic components to be included in the sweep signal, the amplitude of the seismic signal generated by the vibrator can be increased.

公开(公告)号：US10310122B2

公开(公告)日：2019-06-04

申请号：US14957949

申请日：2015-12-03

申请人： CGG SERVICES SA

发明人： Ross Haacke ,  Lorenzo Casasanta ,  Benoit De Cacqueray

IPC分类号： G01V1/36 ,  G01V1/32 ,  G01V1/30

摘要： A method for increasing similarity between a first seismic dataset and a second seismic dataset from at least one seismic survey of a subsurface. The first and second seismic datasets are migrated to a dip angle image domain. The migrated first and second seismic datasets are used in the dip angle image domain to calculate a set of decimating weights to be applied to the first seismic dataset and the second seismic dataset to maximize a similarity between the first seismic dataset and the second seismic dataset. The decimated weights are applied to the first and second seismic datasets, and an image of the subsurface is generated using the first seismic dataset and the second seismic dataset following application of the decimated weights.

公开(公告)号：US10302789B2

公开(公告)日：2019-05-28

申请号：US15124484

申请日：2015-03-13

申请人： CGG SERVICES SA

发明人： Yuan Ni

IPC分类号： G01V1/38 ,  G01V1/36

摘要： In order to use near-field measurements to obtain signature of a signal penetrating seafloor in a shallow water surveyed area, the water-bottom reflections' effect is removed. The removal is performed by obtaining first a far-field initial estimate from stacked primary pulses in the near-field measurements, and then estimating water-bottom reflection portions for different depths using differences between the near-field measurements and the far-field initial estimate. The signature of the air-gun for each shot is then deblended from the near-field measurement for the shot using the one of the water-bottom reflection portions according to a water-bottom depth associated with the shot location.

公开(公告)号：US10267935B2

公开(公告)日：2019-04-23

申请号：US14912247

申请日：2014-09-08

申请人： CGG SERVICES SA

发明人： Florian Duret ,  Julien Cotton

IPC分类号： G01V1/28 ,  G01V1/36

摘要： Method and device for generating an induced source shot point gather. The method includes receiving seismic data at least partially generated by an unintentional seismic source; calculating plural reconstructed receiver traces (RGi) based on pairing traces from the seismic data; and generating the induced source shot point gather based on the plural reconstructed receiver traces (RGi).

公开(公告)号：US10209381B2

公开(公告)日：2019-02-19

申请号：US15119224

申请日：2015-02-17

申请人： CGG SERVICES SA

发明人： Eric Forgues ,  Peter Maxwell ,  Jason Jurok ,  Julien Cotton

IPC分类号： G01V1/00 ,  G01V1/28 ,  G01V1/32 ,  H04W4/38 ,  G01V1/22 ,  G01V1/24 ,  H04W4/00 ,  H04W84/18

摘要： Systems and methods for wireless data acquisition in seismic monitoring systems are disclosed. The method includes obtaining a signal table for an emitted seismic signal, receiving seismic signal data from a receiver configured to transform seismic signals into seismic signal data, and storing the seismic signal data on a storage system. The method also includes determining a time span for the seismic signal data and generating a reduced data set based on the seismic signal data, the signal table, and the time span.

公开(公告)号：US10191165B2

公开(公告)日：2019-01-29

申请号：US14993579

申请日：2016-01-12

申请人： CGG SERVICES SA

发明人： Vetle Vinje

IPC分类号： G01V1/00 ,  G01V1/28 ,  G01V1/36 ,  G01V1/38

摘要： A method for using an offset vector tile gather to image a subsurface defines an offset vector tile gather by selecting a plurality of seismic traces from recorded seismic data. Each seismic trace in the offset vector tile includes reflections from subsurface reflectors and reflection points at depths below the surface of the subsurface. Each reflection point is in a given seismic trace, and each given seismic trace extends from a seismic source to a seismic receiver. The reflection points define an offset vector tile having a source line span and a receiver line span. The source line span is equal to or greater than a distance between adjacent seismic receiver lines, and the receiver line span is less than a distance between adjacent seismic source lines. The offset vector tile gather is used to produce a three dimensional image of the subsurface.

公开(公告)号：US10169652B2

公开(公告)日：2019-01-01

申请号：US14050064

申请日：2013-10-09

申请人： CGG Services SA

发明人： Gordon Poole

IPC分类号： G06K9/00 ,  G01V1/30

摘要： A method for processing seismic data may include receiving input seismic data (di) comprising N spatial coordinates, where the input seismic data is in a first spatial domain, expanding the N spatial coordinates of the input seismic data (di) to N′ modified spatial coordinates, where N′ is greater than N, to provide spatially expanded seismic data (de) that is in a second spatial domain, transforming the spatially expanded seismic data (de) to a model domain to provide model domain data (dm), and generating a final image (df) of a subsurface using the model domain data (dm).

公开(公告)号：US10054706B2

公开(公告)日：2018-08-21

申请号：US15124881

申请日：2015-03-13

申请人： CGG SERVICES SA

发明人： Tony Noss

IPC分类号： G01V1/38

CPC分类号： G01V1/3835 ,  G01V1/3852

摘要： Seismic data recorded on an ocean bottom node (OBN) is used to determine observed direct arrival times at the OBN from a set of seismic source shots having a time span that is only a portion of an entire span time for a shot line. The observed direct arrival times for each shot in the set of seismic source shots are compared statistically with a plurality of predicted direct arrival times for each shot in the set of seismic source shots to derive a statistical measure of differences across all shots. Each predicted direct arrival time is associated with a unique proposed position of the OBN. The unique proposed position that minimizes the statistical measure of differences between the observed direct arrival times and the predicted direct arrival times is selected for each shot in the set of shots as a corrected OBN position.