公开(公告)号：US10656300B2

公开(公告)日：2020-05-19

申请号：US15110352

申请日：2014-01-08

Applicant: STATOIL PETROLEUM AS

Inventor： Torgeir Wiik ,  Eirik Øverland Dischler ,  Janniche Iren Nordskag ,  Anh Kiet Nguyen

IPC: G01V3/08

Abstract: A method of estimating electromagnetic parameters of a geological structure, comprising: providing controlled source electromagnetic, CSEM, data of the structure, calculating a numerical model representing electromagnetic parameters of the structure and generating simulated CSEM data, discretising the numerical model based on prior knowledge of the structure, defining a functional for minimising the distance between said simulated CSEM data and said CSEM data, wherein the functional comprises a regularisation term which depends on prior knowledge of said structure.

公开(公告)号：US11143788B2

公开(公告)日：2021-10-12

申请号：US15572444

申请日：2015-05-08

Applicant: STATOIL PETROLEUM AS

Inventor： Emmanuel Causse ,  Anh Kiet Nguyen ,  Janniche Iren Nordskag ,  Frank Agnar Maaø

IPC: G01V99/00 ,  G01V3/08 ,  G06F17/16 ,  G06F111/10 ,  G01V3/165

Abstract: A method of solving a geophysical inverse problem for estimating a physical parameter, the method comprising providing a model vector representing the physical parameter, transforming the model vector by a first operator to provide a first transformed model vector, solve the inverse problem for the first transformed model vector to provide a first solution, transforming the model vector by a second operator to produce a second transformed model vector, solve the inverse problem for the second transformed model vector to provide a second solution, calculating a weighted sum of the first solution and the second solution.