公开(公告)号：US20240159930A1

公开(公告)日：2024-05-16

申请号：US18503846

申请日：2023-11-07

申请人： BP Corporation North America Inc.

发明人： Hu JIN

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

CPC分类号： G01V1/282 ,  G01V1/303 ,  G01V1/362 ,  G01V2210/512 ,  G01V2210/614 ,  G01V2210/6222 ,  G01V2210/667 ,  G01V2210/67

摘要： A method for implementing a full waveform inversion (FWI) process using angle gathers includes; receiving observed seismic data associated with a subsurface region and captured by one or more seismic receivers, constructing based on the observed seismic data, a scalar velocity model and one or more vector velocity model partitions, where the one or more vector velocity model partitions correspond to one or more unique seismic angles. The method further includes determining one or more vector gradients using the scalar velocity model and the observed seismic data, and updating the one or more vector velocity model partitions using the one or more vector gradients. Additionally, the method also includes determining residual data by comparing synthetic data produced by the scalar velocity model with the observed seismic data, migrating the residual data backwards through time to determine one or more vector gradients, and determining the one or more unique seismic angles as the residual data is migrated backwards through time.

公开(公告)号：US20240125957A1

公开(公告)日：2024-04-18

申请号：US18275303

申请日：2022-02-02

申请人： Vita KALASHNIKOVA ,  PRE STACK SOLUTIONS-GEO AS

发明人： Vita KALASHNIKOVA ,  Rune ÖVERÅS

IPC分类号： G01V1/28 ,  G01V1/30

CPC分类号： G01V1/282 ,  G01V1/303 ,  G01V2210/512 ,  G01V2210/514 ,  G01V2210/614

摘要： The present invention relates to geophysics, and more particularly processing of seismic data for analysis and interpretation. A computer implemented method for extracting or estimating rock properties from seismic traces is disclosed. This method assists in understanding the interpretation of post-stack and pre-stack seismic data by predicting density and velocity. The computer implemented method comprising the follow steps: (1) preparing an initial model with initial functions of velocity and density and synthetic traces; (2) generating synthetic traces from the velocity and density functions with added artificial kinematic constraints; (3) creating updated synthetic traces using randomly updated velocity and density functions; for each iteration, artificial waves traveling from a source point to a reflection point and back are simulated as constraint; (4) performing a search of the misfit object function of any norm, and (5) using probabilistic techniques for approximating the global optimum and minimizing the cost function.

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：US09632192B2

公开(公告)日：2017-04-25

申请号：US14119664

申请日：2011-05-23

申请人： Reda Baina ,  Laurence Nicoletis ,  Matteo Giboli

发明人： Reda Baina ,  Laurence Nicoletis ,  Matteo Giboli

IPC分类号： G01V1/28

CPC分类号： G01V1/28 ,  G01V1/282 ,  G01V2210/512

摘要： The method processes input including, for each of a plurality of shots at respective source locations, seismic traces recorded at a plurality of receiver locations. Offset-modulated data are also computed by multiplying the seismic data in each seismic trace by a horizontal offset between the source and receiver locations for said seismic trace. A depth migration process is applied to the seismic data to obtain a first set of migrated data, and to the offset-modulated data to obtain a second set of migrated data. For each shot, offset values are estimated and associated with respective subsurface positions, by a division process applied to the first and second sets of migrated data.

公开(公告)号：US20170097432A1

公开(公告)日：2017-04-06

申请号：US15276961

申请日：2016-09-27

申请人： CGG SERVICES SA

发明人： Gordon POOLE

IPC分类号： G01V1/36 ,  G01V1/28

CPC分类号： G01V1/36 ,  G01V1/282 ,  G01V1/325 ,  G01V1/368 ,  G01V1/38 ,  G01V2210/1293 ,  G01V2210/1423 ,  G01V2210/244 ,  G01V2210/32 ,  G01V2210/43 ,  G01V2210/46 ,  G01V2210/47 ,  G01V2210/512 ,  G01V2210/56 ,  G01V2210/677 ,  G01V2210/679 ,  G01V2210/74

摘要： Computing device, computer instructions and method for up-down separation of seismic data. The method includes receiving the seismic data, which includes hydrophone data and particle motion data; performing a first up-down separation, which is independent of a ghost model, using as input the hydrophone data and the particle motion data, to obtain first up-down separated data; performing a second up-down separation by using as input a combination of (i) the hydrophone data and/or the particle motion data and (ii) the first up-down separated data, wherein an output of the second up-down separation is second up-down separated data; and generating an image of the subsurface based on the second up-down separated data.

公开(公告)号：US08116168B1

公开(公告)日：2012-02-14

申请号：US12214342

申请日：2008-06-18

申请人： Mingqiu Luo ,  Shengwen Jin

发明人： Mingqiu Luo ,  Shengwen Jin

IPC分类号： G01V1/00

CPC分类号： G01V1/282 ,  G01V2210/512 ,  G01V2210/67

摘要： A migration method using hybrid one-way and full-way (HOF) wave equation propagation. The HOF method extrapolates seismic wavefields in less complex media with a one-way wave equation propagator and extrapolates seismic wavefields in extremely complex media with a full-way wave equation propagator. For prestack depth migration, the HOF extrapolates source-side and receiver-side wavefields independently. Frequency-space domain and time-space domain imaging conditions are applied to the one-way and the full-way extrapolated wavefields, respectively. A suitable amplitude matching factor is introduced to combine the one-way and full-way images. The HOF method is a cost-effective migration that produces superior image quality with less noises and less computational resources.

摘要翻译： 使用混合单向和全向（HOF）波方程传播的迁移方法。 HOF方法用单向波方程传播器外推较小复杂介质中的地震波场，并用全方位波方程传播器在非常复杂的介质中外推地震波场。 对于叠前深度偏移，HOF独立地外推了源侧和接收器侧波场。 频域和时空域成像条件分别应用于单向和全向外推波场。 引入合适的幅度匹配因子来组合单向和全向图像。 HOF方法是一种经济有效的迁移，可以产生出色的图像质量，噪音更小，计算资源更少。

公开(公告)号：US20100118652A1

公开(公告)日：2010-05-13

申请号：US12269994

申请日：2008-11-13

申请人： Jorg Friedrich Schneider

发明人： Jorg Friedrich Schneider

IPC分类号： G01V1/28

CPC分类号： G01V1/282 ,  G01V2210/512 ,  G01V2210/614

摘要： A method is disclosed for processing seismic data. The method includes prestack depth migrating seismic measurements to compute common angle domain image gathers with an initial depth model. Residual moveout analysis is performed in the common angle domain, moveout corrections are derived in terms of the residual radii of curvature at zero reflection angle. Corrections for larger reflection angles are obtained from separate analyses for the coefficients of suitable series expansions. The residual radii of curvature at zero reflection angle can be used to improve the signal to noise ratio of the migrated data and to assess or improve the velocity model used for the prestack depth migration.

摘要翻译： 公开了一种用于处理地震数据的方法。 该方法包括叠前深度迁移地震测量，以计算具有初始深度模型的共同角域图像采集。 残余移动分析在公共角域进行，偏移校正是根据零反射角的残余曲率半径得出的。 对于较大的反射角的校正是从适当的串联扩展的系数的分开的分析获得的。 零反射角的残余曲率半径可用于提高迁移数据的信噪比，并评估或改进用于叠前深度偏移的速度模型。

公开(公告)号：US20240310546A1

公开(公告)日：2024-09-19

申请号：US18671986

申请日：2024-05-22

申请人： CHINA UNIVERSITY OF PETROLEUM (EAST CHINA) ,  INSTITUTE OF ACOUSTICS, CHINESE ACADEMY OF SCIENCES SCIENCES

发明人： Keyu LIU ,  Jianlei GAO ,  Jianliang LIU ,  Xueshen CAO ,  Xiao HE

IPC分类号： G01V1/34 ,  G01V1/28

CPC分类号： G01V1/345 ,  G01V1/282 ,  G01V2210/21 ,  G01V2210/512

摘要： A real-time imaging system for a three-dimensional ultrasonic seismic model, which is used for three-dimensional real-time imaging of a seismic model in an indoor water tank experiment, comprising: an ultrasonic sensor network, comprising at least one emitting probe and at least one receiving probe spaced apart from each other to form a network, which is arranged above a seismic model; and a hardware subsystem, comprising a main control unit, an acquisition unit, an emitting unit, an industrial computer and a display, wherein the acquisition unit, the emitting unit and the industrial computer are electrically connected to the main control unit, the emitting probe is electrically connected to the emitting unit, the receiving probe is electrically connected to the acquisition unit, the display is electrically connected to the industrial computer, and a software subsystem is configured in the industrial computer.

公开(公告)号：US20240210582A1

公开(公告)日：2024-06-27

申请号：US18302119

申请日：2023-04-18

申请人： CGG SERVICES SAS

发明人： Min WANG ,  Yi XIE

IPC分类号： G01V1/28 ,  G01V1/30

CPC分类号： G01V1/282 ,  G01V1/303 ,  G01V2210/512 ,  G01V2210/6222 ,  G01V2210/675

摘要： A method for raw seismic data inversion includes receiving raw seismic data acquired over an underground formation, receiving an initial velocity model of the underground formation, performing a dynamic resolution full waveform inversion, DR-FWI, on the raw seismic data so that a tomography component of a velocity gradient G is compensated to generate a compensated tomographic component while a diving wave component and a migration component are preserved, outputting an updated velocity model based on an illumination compensated velocity gradient G′, which is calculated based on the compensated tomographic component), and locating natural resources in the underground formation using the updated velocity model updated by the DR-FWI.

公开(公告)号：US20240053502A1

公开(公告)日：2024-02-15

申请号：US18494921

申请日：2023-10-26

申请人： Southwest Petroleum University

发明人： Jianhua Dong ,  Lei Chen ,  Xiucheng Tan ,  Min Xiong ,  Tangxuan Liu

IPC分类号： G01V1/50 ,  E21B49/00

CPC分类号： G01V1/50 ,  E21B49/00 ,  G01V2210/512 ,  G01V2210/514 ,  G01V2210/622 ,  E21B2200/20

摘要： The present disclosure provides a TOC prediction method for shale gas reservoirs, including: determining by well-seismic calibration a top interface Ttop and a bottom interface Tbottom of the shale gas reservoirs, and performing layer tracking in the entire area; converting the pre-stack CRP gather into angle gather seismic data; performing spectral shaping processing on the pre-stack migration pure wave seismic data; establishing an initial model, and then performing pre-stack simultaneous inversion to obtain P-wave impedance, S-wave impedance, primary-to-shear wave velocity ratio and density data volume; obtaining a TOC inversion volume A through a post-stack inversion; obtaining a TOC inversion volume B by calculation; then adding the well data for correction, and finally determining a planar distribution law of TOC content. The method can eliminate the multiple solutions of pre-stack inversion and improve the accuracy of TOC content prediction of shale.