公开(公告)号：US20240176036A1

公开(公告)日：2024-05-30

申请号：US18551216

申请日：2022-03-17

申请人： Schlumberger Technology Corporation

发明人： Tao Zhao ,  Chunpeng Zhao ,  Anisha Kaul ,  Aria Abubakar

IPC分类号： G01V1/28 ,  G01V1/30 ,  G06N3/0464 ,  G06N3/08

CPC分类号： G01V1/282 ,  G01V1/303 ,  G06N3/0464 ,  G06N3/08 ,  G01V2210/51 ,  G01V2210/6222

摘要： A method includes receiving seismic data and an initial velocity model, generating a first seismic image based at least in part on the seismic data and the initial velocity model, training a machine learning model to predict salt masks based at least in part on seismic images, merging the initial velocity model and the first salt mask to generate a first modified velocity model, generating an updated velocity model based at least in part on the first modified velocity model, generating a second seismic image based at least in part on the updated velocity model, predicting a second salt mask based at least in part on the second seismic image and the updated velocity model, using the trained machine learning model, and merging the updated velocity model and the second salt mask to generate a second modified velocity model.

公开(公告)号：US11668848B2

公开(公告)日：2023-06-06

申请号：US17357386

申请日：2021-06-24

申请人： SAUDI ARABIAN OIL COMPANY

发明人： Ewenet Gashawbeza ,  Jianwu Jiao ,  Saleh M. Al-Saleh

IPC分类号： G01V1/30 ,  G01V1/28

CPC分类号： G01V1/303 ,  G01V1/282 ,  G01V2210/51 ,  G01V2210/614

摘要： A method may include obtaining a P-wave velocity model and velocity ratio data regarding a geological region of interest. The method may further include generating, based on the P-wave velocity model and the velocity ratio data, an initial S-wave velocity model regarding the geological region of interest. The method may further include determining various velocity boundaries within the initial S-wave velocity model using a trained model. The method may further include updating the initial S-wave velocity model using the velocity boundaries, an automatically-selected cross-correlation lag value based on various seismic migration gathers, and a migration-velocity analysis to produce an updated S-wave velocity model. The method further includes generating a combined velocity model for the geological region of interest using the updated S-wave velocity model and the P-wave velocity model.

公开(公告)号：US20180259663A1

公开(公告)日：2018-09-13

申请号：US15905929

申请日：2018-02-27

申请人： CHEVRON U.S.A. INC.

发明人： Kevin John Davies

IPC分类号： G01V1/34 ,  G01V1/38 ,  G01V1/30

CPC分类号： G01V1/345 ,  G01V1/301 ,  G01V1/302 ,  G01V1/308 ,  G01V1/3808 ,  G01V1/3861 ,  G01V2210/1212 ,  G01V2210/1293 ,  G01V2210/1423 ,  G01V2210/1427 ,  G01V2210/51

摘要： A method is described for processing Near Field Hydrophone (NFH) data including time or depth imaging for 3D and 4D high resolution geological interpretation. The method may include various combinations of source-NFH configurations, such as one or more NFH's mounted on both firing and or non-firing source arrays and source energy generated by cumulative air guns or air gun clusters firing on the active source array and/or individual air guns or air gun clusters firing on the active source array, whether fired simultaneously or non-simultaneously. The method may be executed by a system.

公开(公告)号：US09857489B2

公开(公告)日：2018-01-02

申请号：US14760731

申请日：2014-01-15

申请人： CGG SERVICES SA

发明人： Gilles Lambare ,  Thibaut Allemand

IPC分类号： G01V1/28 ,  G01V1/30

CPC分类号： G01V1/303 ,  G01V1/282 ,  G01V2210/51 ,  G01V2210/6222 ,  G01V2210/671 ,  G01V2210/675

摘要： Disclosed herein is a system and method for building a velocity model for a geographical area of interest (GAI). The system and method comprise determining a ray based tomography velocity image of said GAI using acquired data, determining a high resolution velocity guide (HRVG) image of said GAI, scaling said determined HRVG of said GAI, adding the scaled HRVG to the ray based tomography velocity image to determine an updated ray based tomography velocity image, and determining whether said updated ray based tomography velocity image has experienced convergence by determining whether a cost function of said ray based tomography velocity image does not improve compared to a previously determined cost function value of said ray based tomography velocity image.

公开(公告)号：US20170299745A1

公开(公告)日：2017-10-19

申请号：US15508957

申请日：2015-10-16

申请人： Korea Institute of Geoscience and Mineral Resources

发明人： Byoung Yeop Kim ,  Joong Moo Byun ,  Soon Jee Seol ,  Ho Young Lee

IPC分类号： G01V1/36 ,  G01V1/32 ,  G01V1/28

CPC分类号： G01V1/362 ,  G01V1/28 ,  G01V1/282 ,  G01V1/286 ,  G01V1/30 ,  G01V1/32 ,  G01V2210/51 ,  G01V2210/512 ,  G06T11/00

摘要： The present invention relates to a one-way wave equation prestack depth migration method using an elastic generalized-screen (EGS) wave propagator capable of efficiently expressing the movement of an elastic wave passing through a mutual mode conversion between a P-wave and an S-wave while propagating boundary surfaces of an underground medium, by expanding, to an elastic wave equation, a conventional scalar generalized-screen (SGS) technique capable of quickly calculating the propagation of a wave in a medium in which there is a horizontal speed change, and according to the present invention, provided is a prestack EGS migration method for seismic wave multi-component data, which: can calculate a wave field with higher accuracy in a medium having a complex structure by expanding up to a second term of a Taylor series expansion of a vertical slowness term of a propagator; includes a mode separation operator in the propagator so as to directly use a shot gather as a migration input, without the need to separate multi-component data into a P-wave and an S-wave, enabling P-wave and S-wave image sections to be generated; and is configured to improve the quality of an S-wave migration image by correcting a polarity conversion in a wave number-frequency domain prior to S-wave imaging.

公开(公告)号：US20170242141A1

公开(公告)日：2017-08-24

申请号：US15503773

申请日：2015-09-08

申请人： CGG SERVICES SAS

发明人： Julien COTTON ,  Eric FORGUES

IPC分类号： G01V1/30 ,  G01V1/28 ,  G01V1/36

CPC分类号： G01V1/30 ,  G01V1/282 ,  G01V1/36 ,  G01V2210/51

摘要： Systems and methods for performing seismic migration using an indexed matrix are disclosed. The method includes receiving a seismic trace from a receiver, determining a discretized position of the receiver, and determining a discretized position of a seismic source. The method also includes determining a set of migration indexes based on a matrix, the discretized position of the receiver, and the discretized position of the seismic source, and determining a set of amplitude weights based on the matrix, the discretized position of the receiver, and the discretized position of the seismic source. The method further includes migrating the seismic trace based on the set of migration indexes and the set of amplitude weights.

公开(公告)号：US20170184748A1

公开(公告)日：2017-06-29

申请号：US15312863

申请日：2014-05-21

申请人： SCHLUMBERGER TECHNOLOGY CORPORATION

发明人： Vasily Grigoryevich BAYDIN ,  Leonid Evgenyevich DOVGILOVICH ,  Ivan Lvovich SOFRONOV

IPC分类号： G01V1/36

CPC分类号： G01V1/36 ,  G01V1/282 ,  G01V2210/161 ,  G01V2210/51 ,  G01V2210/679 ,  G06T17/05

摘要： Data of vertical seismic profile in the geological formation are recorded and at least one estimation of a geological formation local model dip is performed, also at least one dynamic dip estimation is performed for at least one wavetype excited by sources and registered by receivers using directionally-based vectors. A difference between the local model dip estimation and the dynamic dip estimation is calculated. Based on the calculated difference between the local model dip estimation and the dynamic dip estimation at least one weighting coefficient is calculated. The calculated at least one weighting coefficient is used for determining at least one formulae for imaging with the use of elastic waves at reverse time migration conditions taking into account a dip angle of the geological formation. The determined at least one formulae is applied to the obtained vertical seismic profile data and at least one image of the geological formation is produced.

公开(公告)号：US20170176616A1

公开(公告)日：2017-06-22

申请号：US14975997

申请日：2015-12-21

申请人： CHEVRON U.S.A. INC.

发明人： Yonghe Sun ,  Guojian Shan ,  Yue Wang ,  Craig Alan Barker

IPC分类号： G01V1/30 ,  G01V1/36

CPC分类号： G01V1/306 ,  G01V1/362 ,  G01V2210/51 ,  G01V2210/514

摘要： A method is described for seismic imaging of the subsurface using dip-guided optimized stacking. The method computes weighting functions for a plurality of single-shot migrated images, unstacked seismic images, or partially stacked seismic images based on a slant stack performed using an input dip dataset; applying the plurality of weighting functions to the plurality of single-shot migrated images, unstacked seismic images, or partially stacked seismic images, or a plurality of dip-filtered images to create a plurality of weighted images; and summing the plurality of weighted images into a stacked seismic image. The method may be executed by a computer system.

公开(公告)号：US20160356905A1

公开(公告)日：2016-12-08

申请号：US15171067

申请日：2016-06-02

申请人： CGG SERVICES SA

发明人： Habib ALKHATIB

IPC分类号： G01V1/30

CPC分类号： G01V1/308 ,  G01V2210/51 ,  G01V2210/6122

摘要： A method for monitoring a subsurface during a 4-dimensional (4D) survey. The method includes obtaining an area of the subsurface that needs to be monitored; identifying receiver and source locations for the area and source frequencies to be emitted into the area based on demigration or inverse ray tracing; performing a light base survey for the area; performing a light monitor survey for the area; and generating an image of the area based on a comparison of (i) the light base survey, and (ii) the light monitor survey for the area.

摘要翻译： 在四维（4D）调查期间监测地下的方法。 该方法包括获得需要监测的地下区域; 基于去迁移或反向光线跟踪识别要发射到该区域的区域和源频率的接收器和源位置; 对该地区进行轻型基地调查; 对该地区进行轻型监测调查; 并且基于（i）轻型基础测量和（ii）该区域的光监视器调查的比较来生成该区域的图像。

公开(公告)号：US20160202374A1

公开(公告)日：2016-07-14

申请号：US14994908

申请日：2016-01-13

申请人： WesternGeco L.L.C.

发明人： Sribharath Kainkaryam ,  David Nichols ,  Robert Bloor ,  Marvin Decker

IPC分类号： G01V1/30 ,  G01V1/28

CPC分类号： G01V1/303 ,  G01V2210/51

摘要： Systems, methods, and computer-readable media for determining a velocity model. The method includes receiving a first velocity model having a first symmetry approximation of a media of a subterranean domain, receiving seismic data representing a subterranean formation, and determining, by operation of a processor, a second velocity model having a second symmetry approximation of the media, the second symmetry approximation being less symmetric than the first symmetry approximation. The second velocity model is determined based on an estimate of residual moveout as a function of azimuth and one or more differentials that relate one or more changes in residual moveout as a function of azimuth to one or more orthorhombic parameters. The method also including migrating the seismic data using the second velocity model.

摘要翻译： 用于确定速度模型的系统，方法和计算机可读介质。 该方法包括接收具有地下域的介质的第一对称近似的第一速度模型，接收表示地下地层的地震数据，以及通过处理器的操作确定具有介质的第二对称近似的第二速度模型 ，第二对称近似与第一对称近似较不对称。 第二速度模型基于作为方位角和一个或多个差异的函数的残余移动的估计来确定，所述差异将残余移动中的一个或多个变化作为方位角的函数与一个或多个正交参数相关联。 该方法还包括使用第二速度模型迁移地震数据。