ADAPTIVE ENSEMBLE-BASED GAUSS-NEWTON OPTIMIZATION METHOD FOR SOLVING HIGHLY-NONLINEAR PROBLEMS

摘要

Device, medium and method for generating an image of a subsurface of theearth. The method includes generating (800) an ensemble of realizations (M)basedon data related to the subsurface; applying (802) an objective function (O) tomembers (m) of the ensemble of realizations (m) and corresponding estimateddatato estimate a mismatch; selecting (804) a best sensitivity matrix (G) from apluralityof sensitivity matrices associated with the objective function (O) and theensemble ofrealizations (M); updating (806) realization parameters (m pr), which are usedas inputfor a forward model (f), to calculate the corresponding estimated data, basedon thebest sensitivity matrix (G); and generating (808) an image of the subsurfacebasedon (1) the data related to the subsurface of the earth and (2) the forwardmodel (f)with updated realization parameters (m pr).