2-D time-domain waveform inversion using Gauss-Newton methodology in elastic media, case study: complex marmousi2 model

Full-Waveform Inversion (FWI) can be defined as an iterative fitting data procedure for obtaining physical properties of the Earth based on the full wave-field data simulation. Hence, FWI is widely known as a comprehensive way to solve the complex structure below the earth surface, it performed a high-resolution image, and very powerful when it combined with the good prior model.

In this research, we especially focusing on how we worked with the 2-D Full-Waveform Inversion (FWI) using Gauss-Newton approach in elastic media. The steps included the forward modeling problem based on the finite-difference and staggered grid scheme that bounded by free-surface boundary condition (on the top of model) and Perfectly Matched Layer (PML) for the rest, also, we applied the Gauss-Newton inversion that exploit the approximate-Hessian into this methodology. For the result, we tested the inversion modeling in simple layer cake model and complex marmousi2 model, both of those models are located in the shallow area.