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    FAST VISCOACOUSTIC AND VISCOELASTIC FULL-WAVEFIELD INVERSION
    3.
    发明公开
    FAST VISCOACOUSTIC AND VISCOELASTIC FULL-WAVEFIELD INVERSION 审中-公开
    快速粘声和粘弹性全波反演

    公开(公告)号：EP3158367A1

    公开(公告)日：2017-04-26

    申请号：EP15780966.6

    申请日：2015-04-22

    申请人： ExxonMobil Upstream Research Company

    发明人： DENLI, Huseyin ,  KANEVSKY, Alex

    IPC分类号： G01V1/28

    CPC分类号： G01V99/005 ,  G01V1/282 ,  G01V2210/614 ,  G01V2210/6161 ,  G01V2210/62 ,  G01V2210/675

    摘要： A method, including: obtaining an initial geophysical model; modeling a forward wavefield with viscoacoustic or viscoelastic wave equations; modeling an adjoint wavefield with adjoint viscoacoustic or adjoint viscoelastic wave equations, wherein the adjoint viscoacoustic wave equations are based on an auxiliary variable that is a function of pressure and a memory variable or the adjoint viscoelastic wave equations are based on a combination of stress and a memory variable, respectively; obtaining a gradient of a cost function based on a combination of a model of the forward wavefield and a model of the adjoint wavefield; and using the gradient of the cost function to update the initial geophysical model and obtain an updated geophysical model.

    摘要翻译： 一种方法，包括：获得初始地球物理模型; 用粘声或粘弹波方程建模前向波场; 使用伴随粘声波或伴随粘弹性波动方程模拟伴随波场，其中伴随粘弹性波方程基于作为压力和存储变量的函数的辅助变量，或者伴随粘弹性波方程基于应力和 内存变量，分别; 基于前向波场的模型和伴随波场的模型的组合来获得成本函数的梯度; 并使用成本函数的梯度来更新初始地球物理模型并获得更新的地球物理模型。

    TIME-LAPSE SIMULTANEOUS INVERSION OF AMPLITUDES AND TIME SHIFTS CONSTRAINED BY PRE-COMPUTED INPUT MAPS
    4.
    发明公开
    TIME-LAPSE SIMULTANEOUS INVERSION OF AMPLITUDES AND TIME SHIFTS CONSTRAINED BY PRE-COMPUTED INPUT MAPS 审中-公开
    按输入预消费额度上限的幅度和时间偏移逆转法同时LAPSE

    公开(公告)号：EP3084478A2

    公开(公告)日：2016-10-26

    申请号：EP14851439.1

    申请日：2014-12-11

    申请人： CGG Services SA

    发明人： LAFET, Yves ,  MICHOU, Laurene ,  ROURE,Benjamin ,  BORNARD, Raphaël

    IPC分类号： G01V1/30

    CPC分类号： G01V1/308 ,  G01V1/282 ,  G01V1/306 ,  G01V2210/612 ,  G01V2210/6122 ,  G01V2210/614 ,  G01V2210/6161 ,  G01V2210/622

    摘要： Global inversion of multi-vintage seismic data uses simulated annealing to minimize a cost function simultaneously for all vintages and all angle stacks to yield values of geophysical properties. Each vintage is generated from an independent seismic survey of a subsurface structure conducted over a distinct period of time and includes seismic traces and angle stacks. An initial model of the subsurface structure is used and includes values for geophysical properties and time shift maps between vintages. The time shift map contains shifts in the seismic trace between vintages. The cost function includes a time shift map term for the difference between the time shift map and a calculated time shift of the seismic trace between vintages and is based on a proposed perturbation to at least one of the geophysical properties. The time shift map is also used as a global constraint on proposed perturbations of subsurface properties.

    摘要翻译： 多老式地震数据的全局反演使用模拟退火，为使所有老式同时最小化的成本函数和所有角度叠层，得到的地球物理属性的值。 每个老式从在传导在一段不同周期的地下结构的独立地震勘测中产生，并包括地震记录道和角度叠加。 地下结构的初始模型被使用并且包括用于老式之间地球物理性质和时移映射值。 时移映射包含在老式之间的地震道的变化。 成本函数包括用于所述时间变速图和复古和基于一个建议的扰动的地球物理性质中的至少一个之间的地震道的计算的时间偏移之间的差的时间变速图的术语。 因此，时移图被用作地下特性的建议扰动的全局约束。

    SIMULTANEOUS SOURCING DURING BOTH SEISMIC ACQUISITION AND SEISMIC INVERSION
    5.
    发明公开
    SIMULTANEOUS SOURCING DURING BOTH SEISMIC ACQUISITION AND SEISMIC INVERSION 有权
    同时源测定时的地震数据采集和地震反演

    公开(公告)号：EP3036566A2

    公开(公告)日：2016-06-29

    申请号：EP14744730.4

    申请日：2014-07-11

    申请人： ExxonMobil Upstream Research Company

    发明人： KROHN, Christine, E. ,  ROUTH, Partha, S.

    IPC分类号： G01V1/00 ,  G01V1/38

    CPC分类号： G01V1/282 ,  G01V1/003 ,  G01V1/005 ,  G01V1/247 ,  G01V1/303 ,  G01V1/362 ,  G01V1/368 ,  G01V1/38 ,  G01V1/3808 ,  G01V2210/1212 ,  G01V2210/127 ,  G01V2210/1423 ,  G01V2210/32 ,  G01V2210/6161 ,  G01V2210/6222 ,  G01V2210/66

    摘要： Method for acquiring, at reduced acquisition cost, seismic data using simultaneous, field-encoded sources in the field (702), and then constructing pseudo source-records (703) that better meet the requirements for using additional simultaneous computer-encoded sourcing for computer simulations or forward modeling (706) as part of (707) iterative FWI (Full Wavefield Inversion) or RTM (Reverse Time Migration), with additional reduction in computational costs. By better meeting the requirements of simultaneous sourcing for FWI or RTM (701), artifacts and crosstalk are reduced in the output. The method can be used for marine streamer acquisition and other non-fixed spread geometries to acquire both positive and negative offsets and to mitigate the “missing data” problem for simultaneous-source FWI. It can also be used for land data to overcome issues with moving spreads and long continuous records.

    摘要翻译： 用于获取，在减压购置成本的方法，使用的地震数据中的字段（702）的同时，场编码的源，然后构建伪源记录（703）做更好地满足要求使用用于计算机的其他同时的计算机编码的采购 模拟或正演模拟（706）如（707）迭代FWI（全波场反转）或RTM（逆时偏移）的一部分，在计算成本进一步降低。 通过更好地满足用于FWI或RTM（701）同时进行采购的要求，工件和串扰在输出降低。 该方法可用于海洋拖缆采集和其它非固定扩散的几何形状以获得阳性和负偏移，并减轻用于同时源FWI“丢失数据”的问题。 因此，它可以用于国家的数据，以克服移动价差和长时间连续记录的问题。

    TWO COMPONENT SOURCE SEISMIC ACQUISITION AND SOURCE DE-GHOSTING
    6.
    发明公开
    TWO COMPONENT SOURCE SEISMIC ACQUISITION AND SOURCE DE-GHOSTING 审中-公开
    由两个部分组成来源和去重影震源地震采集

    公开(公告)号：EP2712427A2

    公开(公告)日：2014-04-02

    申请号：EP12783003.2

    申请日：2012-03-09

    申请人： ExxonMobil Upstream Research Company

    发明人： MEIER, Mark, A. ,  DUREN, Richard, E.

    IPC分类号： G01V1/04

    CPC分类号： G01V1/04 ,  E21B43/01 ,  G01V1/3808 ,  G01V2210/1293 ,  G01V2210/56 ,  G01V2210/6161

    摘要： Method for marine seismic acquisition using both monopole (91) and dipole (92) source types. Through a combination of source design and operation and/or combination or summing of the data in a processing step, the source ghost is either attenuated or, if desired, enhanced (93). The properties of the two different source types allow them to be adjusted so that the first down going wave from each has either opposite polarity or the same polarity, whereas the source-ghost wave will have, respectively same polarity or opposite polarity. This allows cancellation or enhancement of the source ghost. If the survey also employs two- component sensor acquisition, then the combined data sets may be both sensor de-ghosted and source de-ghosted.