公开(公告)号：US11988789B2

公开(公告)日：2024-05-21

申请号：US17247503

申请日：2020-12-14

Applicant: ExxonMobil Technology and Engineering Company

Inventor： Junzhe Sun ,  Valeriy V. Brytik ,  Lingxiao Zhang ,  Erik R. Neumann

IPC: G01V1/28 ,  G01V1/36 ,  G06F30/20

CPC classification number: G01V1/282 ,  G01V1/362 ,  G06F30/20

Abstract: A method for approximating an inverse Hessian is provided. One methodology to generate the inverse Hessian is to precondition the gradient, such as by using point-spread function deconvolution, T-power, or source-illumination compensation, prior to using non-stationary matching filters (NMF) to generate the inverse Hessian. Various types of NMF are contemplated, including using filters for different windows in the subsurface or using filters assigned to specific locations in the subsurface. Further, the number of filters for NMF may vary from iteration to iteration. For example, the filters assigned to the specific locations in the subsurface may be generated in a multi-scale manner, in which an initial iteration uses longer scale/longer wavelength features for inversion and subsequent iterations use finer scale/smaller wavelength features for inversion.