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公开(公告)号：US10739480B2
公开(公告)日：2020-08-11
申请号：US15893898
申请日：2018-02-12
摘要： A computer-implemented method for updating subsurface models including: using an offset continuation approach to update the model, and at each stage defining a new objective function where a maximum offset for each stage is set, wherein the approach includes, performing a first stage iterative full wavefield inversion with near offset data, as the maximum offset, to obtain velocity and density or impedance models, performing subsequent stages of iterative full wavefield inversion, each generating updated models, relative to a previous stage, wherein the subsequent stages include incrementally expanding the maximum offset until ending at a full offset, wherein a last of the stages yields finally updated models, the subsequent stages use the updated models as starting models, and the full wavefield inversions include constraining scales of the velocity model updates at each stage of inversion as a function of velocity resolution; and using the finally updated models to prospect for hydrocarbons.
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2.发明申请公开(公告)号：US20180275300A1
公开(公告)日：2018-09-27
申请号：US15893898
申请日：2018-02-12
CPC分类号： G01V1/282 , G01V1/303 , G01V1/306 , G01V99/005 , G01V2210/614 , G01V2210/6222 , G01V2210/6224 , G01V2210/6226 , G01V2210/675
摘要： A computer-implemented method for updating subsurface models including: using an offset continuation approach to update the model, and at each stage defining a new objective function where a maximum offset for each stage is set, wherein the approach includes, performing a first stage iterative full wavefield inversion with near offset data, as the maximum offset, to obtain velocity and density or impedance models, performing subsequent stages of iterative full wavefield inversion, each generating updated models, relative to a previous stage, wherein the subsequent stages include incrementally expanding the maximum offset until ending at a full offset, wherein a last of the stages yields finally updated models, the subsequent stages use the updated models as starting models, and the full wavefield inversions include constraining scales of the velocity model updates at each stage of inversion as a function of velocity resolution; and using the finally updated models to prospect for hydrocarbons.
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公开(公告)号：US20180045839A1
公开(公告)日：2018-02-15
申请号：US15614954
申请日：2017-06-06
申请人： Yaxun Tang , Sunwoong Lee , Anatoly I Baumstein , Volkan Akcelik
发明人： Yaxun Tang , Sunwoong Lee , Anatoly I Baumstein , Volkan Akcelik
摘要： A computer-implemented method for updating a physical properties model of a subsurface region in an iterative inversion of seismic data using a gradient of a cost function that compares the seismic data to model-simulated data, said method comprising: obtaining a contrast model of a subsurface physical parameter that is sensitive to data dynamics and a kinematic model of a subsurface physical parameter; determining a gradient of a cost function using the contrast model and the kinematic model, wherein the cost function compares seismic data to model-simulated data; updating the kinematic model using a search direction derived from the gradient; adapting the contrast model according to an update to the kinematic model performed in the updating step; iteratively repeating the determining, updating, and adapting steps until a predetermined stopping criteria is reached, and generating a subsurface image from a finally updated kinematic model; and using the subsurface image to prospect for hydrocarbons.
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公开(公告)号：US10698126B2
公开(公告)日：2020-06-30
申请号：US15614954
申请日：2017-06-06
申请人： Yaxun Tang , Sunwoong Lee , Anatoly I Baumstein , Volkan Akcelik
发明人： Yaxun Tang , Sunwoong Lee , Anatoly I Baumstein , Volkan Akcelik
摘要： A computer-implemented method for updating a physical properties model of a subsurface region in an iterative inversion of seismic data using a gradient of a cost function that compares the seismic data to model-simulated data, said method comprising: obtaining a contrast model of a subsurface physical parameter that is sensitive to data dynamics and a kinematic model of a subsurface physical parameter; determining a gradient of a cost function using the contrast model and the kinematic model, wherein the cost function compares seismic data to model-simulated data; updating the kinematic model using a search direction derived from the gradient; adapting the contrast model according to an update to the kinematic model performed in the updating step; iteratively repeating the determining, updating, and adapting steps until a predetermined stopping criteria is reached, and generating a subsurface image from a finally updated kinematic model; and using the subsurface image to prospect for hydrocarbons.
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5.发明申请Krylov-Space-Based Quasi-Newton Preconditioner for Full-Wavefield Inversion 审中-公开用于全波场反演的Krylov-Space-based准牛顿预处理器公开(公告)号：US20170003409A1
公开(公告)日：2017-01-05
申请号：US15190222
申请日：2016-06-23
申请人： Volkan Akcelik , Huseyin Denli
发明人： Volkan Akcelik , Huseyin Denli
摘要： A method, including: storing, in a computer memory, seismic data acquired from a seismic survey of a subsurface region; and generating, with a computer, a final subsurface physical property model of the subsurface region by processing the seismic data with an iterative full wavefield inversion method, wherein the iterative full wavefield inversion method generates the final subsurface physical property model by iteratively applying a linear solver with a preconditioner that is generated from information from one or more previous iterations of the linear solver.
摘要翻译： 一种方法，包括：在计算机存储器中存储从地下区域的地震勘测获取的地震数据; 并通过用迭代全波场反演方法处理地震数据，通过计算机生成地下区域的最终地下物理属性模型，其中迭代全波场反演方法通过迭代应用线性求解器生成最终的地下物理属性模型 具有从线性求解器的一个或多个先前迭代的信息产生的预处理器。
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公开(公告)号：US10416327B2
公开(公告)日：2019-09-17
申请号：US15071393
申请日：2016-03-16
申请人： Volkan Akcelik , Jerome R. Krebs
发明人： Volkan Akcelik , Jerome R. Krebs
IPC分类号： G06F19/00 , G01V1/40 , G01V3/18 , G01V5/04 , G01V9/00 , G01N15/08 , G01V1/28 , G01V1/38 , G01V1/30
摘要： A method, including: storing, in a computer storage device, geophysical seismic data that has been separated into a multiple-free component and a multiple contaminated component; performing, with a processor, a first full wavefield inversion process on the multiple-free component of the seismic data, wherein a first subsurface physical property model is generated; determining, with a processor, an extended target reflectivity, wherein the extended target reflectivity includes a reflectivity for each of a plurality of shots; separately performing, with a processor, a second full wavefield inversion process with the multiple contaminated component of the seismic data for each of the plurality of shots using the reflectivity corresponding to each of the plurality of shots, wherein a second subsurface physical property model is generated; and generating, with a processor, multiple-free final subsurface physical property model by combining the first subsurface physical property model and the second subsurface physical property model.
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