Toward an automatic full-wave inversion: Synthetic study cases
نویسندگان
چکیده
منابع مشابه
Source Estimation by Full Wave Form Inversion
We consider the inverse problem of estimating the parameters describing a seismic source, based on time-dependent ground motion recordings at a number of receiver stations. The source is modeled as a point moment tensor forcing, characterized by its location, moment tensor components, start time, and frequency parameter in the time function. In total, there are 11 unknown parameters. We use a n...
متن کاملFull waveform inversion of crosswell seismic data using automatic differentiation
Full waveform inversion (FWI) is an effective and efficient data-fitting technique that has been widely used to produce accurate estimation of model parameters in Geophysics. The efficiency and accuracy of FWI are determined by the three main components: numerical solution for forward problem, gradient calculation and model update which usually involves the optimization method. The success of t...
متن کاملAn integrated inversion of seismic refraction and reflection data using combined wave-equation tomography and full waveform inversion
We have developed an integrated method to obtain highresolution subsurface elastic parameters using combined wave equation tomography (WET) and full waveform inversion (FWI). Both refraction and reflection data are used. During parameterization, long wavelength and short wavelength structures are separated and mapped into velocity and density to account for kinematics and dynamics, respectively...
متن کاملToward 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 کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Leading Edge
سال: 2016
ISSN: 1070-485X,1938-3789
DOI: 10.1190/tle35121047.1