公开(公告)号：US20210063590A1

公开(公告)日：2021-03-04

申请号：US16913385

申请日：2020-06-26

Applicant: CGG SERVICES SAS

Inventor： James COOPER ,  Andrew RATCLIFFE ,  Gordon POOLE

IPC: G01V1/28 ,  G01V1/34 ,  G01V1/30

Abstract: Methods and apparatuses for seismic exploration of an underground structure obtain improved images by integrating partial match filtering in an FWI. Filtered (auxiliary) data replaces one of the observed data and the synthetic data in the FWI's objective function to avoid cycle skipping.

公开(公告)号：US20170254914A1

公开(公告)日：2017-09-07

申请号：US15440438

申请日：2017-02-23

Applicant: CGG SERVICES SAS

Inventor： Risto SILIQI ,  Gordon POOLE

IPC: G01V1/38

CPC classification number: G01V1/3817

Abstract: Seismic survey system and method for adjusting positions of plural autonomous receiver nodes (ARNs) of a seismic survey system. The method includes calculating first travel-times of direct arrivals of seismic waves, based on (i) offsets between shooting positions of seismic sources and recording positions of the plural ARNs, and (ii) a speed of the seismic waves in water; estimating second travel-times of the direct arrivals, based on seismic data recorded by the plural ARNs; estimating, in a computing device, positioning errors of one or more of the plural ARNs by applying an inversion algorithm to a misfit between the first and second travel-times; and adjusting the recording positions of the one or more ARNs with the positioning errors.

公开(公告)号：US20170219732A1

公开(公告)日：2017-08-03

申请号：US15409938

申请日：2017-01-19

Applicant: CGG SERVICES SAS

Inventor： Gordon POOLE

IPC: G01V1/36 ,  G01V1/38

CPC classification number: G01V1/36 ,  G01V1/282 ,  G01V1/301 ,  G01V1/364 ,  G01V1/38 ,  G01V2210/532 ,  G01V2210/56 ,  G01V2210/614

Abstract: Computing device, computer instructions and method for correcting an image, of a surveyed surface, due to a free-surface reflection. The method includes calculating a free surface reflection operator for a seismic source displaced in water based on a position of the source, and an air-water interface datum; receiving recorded seismic data d recorded with seismic sensors (r), wherein the recorded seismic data is associated with a pressure and/or a particle motion produced by a seismic wave in earth; correcting the recorded seismic data d based on the free surface reflection operator to obtain transformed seismic data; and generating an image of the surveyed subsurface, based on the transformed seismic data, wherein the image is indicative of various layers of the earth. The free surface reflection operator varies while a source signal is being emitted by the source.

公开(公告)号：US20240184004A1

公开(公告)日：2024-06-06

申请号：US18358357

申请日：2023-07-25

Applicant: CGG SERVICES SAS

Inventor： Gordon POOLE

IPC: G01V1/28

CPC classification number: G01V1/282 ,  G01V2210/675

Abstract: A method for internal multiple attenuation of seismic data associated with a subsurface. The method includes receiving seismic data d associated with the subsurface, wherein the seismic data d includes primaries and internal multiples, receiving a first reflectivity r1 associated with a first formation in the subsurface, calculating a second reflectivity r2 associated with a second formation in the subsurface, based on wavefield extrapolation of the seismic data d and a reflection in the first reflectivity r1, wherein the second formation is different from the first formation, calculating the internal multiples using (1) wavefield extrapolation of the seismic data d, (2) the reflection in the first reflectivity r1, and (3) a reflection in the second reflectivity r2, attenuating the internal multiplies from the seismic data d by subtraction, and generating an image of the subsurface indicative of geophysical features associated with oil or gas resources.

公开(公告)号：US20170248716A1

公开(公告)日：2017-08-31

申请号：US15521647

申请日：2015-11-13

Applicant: CGG SERVICES SAS

Inventor： Gordon POOLE

IPC: G01V1/28 ,  G01V1/36 ,  G01V1/32

CPC classification number: G01V1/282 ,  G01V1/28 ,  G01V1/32 ,  G01V1/364 ,  G01V2210/21 ,  G01V2210/22 ,  G01V2210/23 ,  G01V2210/30 ,  G01V2210/46

Abstract: Computing device, computer instructions and method for processing input seismic data d. The method includes receiving the input seismic data d recorded in a data domain, solving a linear inversion problem constrained by input seismic data d to obtain a model domain and its energy, wherein the linear inversion problem is dependent on sparseness weights that are simultaneously a function of both time and frequency, reverse transforming the model domain energy to the data domain, and generating an image of a surveyed subsurface based on the reverse transformed model domain energy.

公开(公告)号：US20170199289A1

公开(公告)日：2017-07-13

申请号：US15402830

申请日：2017-01-10

Applicant: CGG SERVICES SAS

Inventor： Can PENG ,  Arash JAFARGANDOMI ,  Henning HOEBER ,  James COOPER ,  Gordon POOLE

IPC: G01V1/36 ,  G01V1/30 ,  G01V1/28

CPC classification number: G01V1/362 ,  G01V1/282 ,  G01V1/307 ,  G01V1/375 ,  G01V2210/512 ,  G01V2210/632

Abstract: Generating spectrally enhanced seismic data expresses seismic data as a convolution of reflectivity and a seismic source wavelet. This seismic source wavelet varies over a sampling interval and defining a total amount of energy over the sampling interval. An enhanced seismic source wavelet that is a single-valued energy spike that yields the total amount of energy over the sampling interval is generated. In addition, the reflectivity is modified to preserve amplitude variation with angle. The reflectivity is convoluted with the enhanced seismic source wavelet and residual energy is added to the convolution to generate the spectrally enhanced seismic data.

公开(公告)号：US20240184008A1

公开(公告)日：2024-06-06

申请号：US18456862

申请日：2023-08-28

Applicant: CGG SERVICES SAS

Inventor： Gordon POOLE ,  Milad FARSHAD

IPC: G01V1/36

CPC classification number: G01V1/362 ,  G01V2210/59

Abstract: A method for removing multiples m from seismic data d associated with a subsurface, the method including receiving the seismic data d associated with the subsurface, forward propagating the seismic data d into the subsurface to form forward propagated data dΦ; receiving angular dependent reflectivities rθ, associated with an angular range Δθ, in the subsurface, for a given point; generating an angle dependent reflecting wavefield DΦθrθ based on the forward propagated data dΦ and the angular dependent reflectivities rθ; calculating a multiple model ΦDΦθrθ by forward propagating the angle dependent reflecting wavefield DΦθrθ to the receiver; attenuating multiplies m associated with the multiple model, from the seismic data d, by subtraction of the multiple model to calculate demultiple data dd; and generating an image of the subsurface.

公开(公告)号：US20240069233A1

公开(公告)日：2024-02-29

申请号：US18504336

申请日：2023-11-08

Applicant: CGG SERVICES SAS

Inventor： Gordon POOLE ,  Ross HAACKE

IPC: G01V1/32

CPC classification number: G01V1/325 ,  G01V2210/144 ,  G01V2210/56

Abstract: A method for processing seismic data, the method including receiving seismic data acquired by at least one receiver over a water-covered subsurface formation; generating, based on the seismic data, a down-going wavefield; generating, based on the seismic data, a partial down-going wavefield with attenuated water-wave; estimating a subsurface reflectivity R using multi-dimensional deconvolution, which equates (1) a convolution of the down-going wavefield with the subsurface reflectivity R to (2) the partial down-going wavefield; and generating an image of the water-covered subsurface formation based on the subsurface reflectivity R.

公开(公告)号：US20210364666A1

公开(公告)日：2021-11-25

申请号：US17394543

申请日：2021-08-05

Applicant: CGG SERVICES SAS

Inventor： Gordon POOLE ,  Henning HOEBER ,  Adel KHALIL

IPC: G01V1/36 ,  G01V1/32 ,  G01V1/28

Abstract: A non-blended dataset related to a same surveyed area as a blended dataset is used to deblend the blended dataset. The non-blended dataset may be used to calculate a model dataset emulating the blended dataset, or may be transformed in a model domain and used to derive sparseness weights, model domain masking, scaling or shaping functions used to deblend the blended dataset.

公开(公告)号：US20190271789A1

公开(公告)日：2019-09-05

申请号：US16419342

申请日：2019-05-22

Applicant: CGG SERVICES SAS

Inventor： Chris DAVISON ,  Gordon POOLE ,  Ziqin YU ,  Yuan NI

IPC: G01V1/36 ,  G01V1/38

Abstract: A method for estimating a time variant signal representing a seismic source obtains seismic data recorded by at least one receiver and generated by the seismic source, the recorded seismic data comprising direct arrivals and derives the time variant signal using an operator that relates the time variant signal to the acquired seismic data, the operator constrained such that the time variant signal is sparse in time.