
%0 Journal Article
%A Egorov, Anton 
%A B&#x3cc;na, Andrej 
%A Pevzner, Roman 
%A Tertyshnikov, Konstantin 
%T Potential of full waveform inversion of vertical seismic profile data in hard rock environment
%J ASEG Extended Abstracts
%D 2018/02/26
%V 2018
%N 1
%P 1-3
%K 
%R https://doi.org/10.1071/ASEG2018ABW8_1F
%U https://www.publish.csiro.au/paper/ASEG2018ABW8_1F 
%X Complex structure of the subsurface in hard rock environment often complicates traditional processing and interpretation of seismic datasets based on the analysis of reflected waves. Full-waveform inversion (FWI), in turn, utilizes the whole wavefield, including the transmitted waves and reflections, to build the models of physical properties (such as P wave velocity and density), which is one of its main advantages over traditional methods of seismic imaging. We conduct a feasibility study of 2D full-waveform inversion (FWI) applied to vertical seismic profile (VSP) synthetic data computed in a model that is based on a real hard-rock survey site for the purpose of identification of heterogeneities. Using this complex model of the subsurface that contains steep interfaces, high seismic wave velocities and densities, we generate a synthetic VSP dataset with a finite-difference code. Multi-offset VSP geometry is considered due to the abundance of transmitted waves. We then apply FWI to this dataset. We use finite-difference modelling for the forward problem in FWI, optimization is conducted using the limited-memory BFGS method. FWI is applied in a multiscale manner, from 10 Hz to 190 Hz. Inversion results suggest that FWI of VSP data is a suitable tool for building the models of physical properties of the subsurface that are crucial for mineral exploration and mine planning. 
