A numerically exact local solver applied to salt boundary inversion in seismic full-waveform inversion
نویسندگان
چکیده
s 2013, pp. 5180–5184. Keys, R. & Weglein, A., 1983. Generalized linear inversion and the first born theory for acoustic media, J. Math. Phys., 24,
منابع مشابه
Toward target-oriented FWI: An exact local wave solver applied to salt boundary inversion
Seismic full waveform inversion (FWI) uses the gradient of the objective function for computing model updates. This requires computation of the forward and adjoint wavefields on the current model estimate. Calculating the gradient on the full computational domain is wasteful when it is only required in a limited region of interest, as is the case in 4D seismic and salt boundary estimation, for ...
متن کاملDiscretized Adjoint State Time and Frequency Domain Full Waveform Inversion: A Comparative Study
This study derives the discretized adjoint states full waveform inversion (FWI) in both time and frequency domains based on the Lagrange multiplier method. To achieve this, we applied adjoint state inversion on the discretized wave equation in both time domain and frequency domain. Besides, in this article, we introduce reliability tests to show that the inversion is performing as it should be ...
متن کاملShape Optimization in Full Waveform Inversion with Sparse Blocky Model Representations
Abstract. We present a variational framework for shape optimization and shape reconstruction problems in seismic domains based full waveform inversion. We discuss general shape functionals in this framework, along with applications to shape optimization using the Helmholtz equation and image domain segmentation. We study the shape derivative in each case to express the variation of energy with ...
متن کاملRapid 4D FWI using a local wave solver
Much of the computational cost involved in full-waveform inversion comes from the solution of the wave equation in a large domain. These computations must be done for the entire domain through which we expect waves to pass for a particular survey, despite the fact that our region of interest is often significantly smaller. In addition to the wasted time spent propagating waves through less impo...
متن کاملSeismic Full-waveform Inversion of Salt Geometry Using a Level Set Approach
SUMMARY An accurate definition of geometry of complex subsurface bodies, such as salt intrusions, is crucial for imaging below such targets. Full-waveform inversion (FWI) is a method for building high-resolution seismic velocity models from nonlinear iterative minimization of the misfit between observed and synthetic seismic data. The ability of FWI to accurately recover the geometry of salt bo...
متن کامل