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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
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。