Refined Experimental Studies for Improving the Reduced-scale Physical Modeling of Seismic Subsurface Measurement

The potential of experimental seismic modeling at reduced scale is explored since several years because it provides an intermediate step between numerical tests and geophysical campaigns on field sites. The MUSC system is designed as a reliable tool, able to produce multi-sources and multi-receivers experimental seismic data suitable for high-resolution imaging techniques like Full Waveform Inversion. However, experimental seismic modeling has limitations such as finite dimensions models used instead of realistic half-space models and three-dimensional seismic data generated by the point-source whereas most of wave propagation and imaging algorithms make use of two-dimensional forward modeling for numerical cost reasons. The main objective of the presented study is thus to improve the experimental seismic modeling to generate reproducible, realistic and suitable data which will be distributed in the scientific community. In this scope, we have: 1) refined the comparison between numerical and experimental data by generating experimental two-dimensional line-sources, 2) assessed the reproducibility of the source emitted in a model by the piezzo-electric transducer and 3) reduced efficiently the boundary reflections with the help of an adapted new geometry of the edges which absorbs a large band of the incident waves spectrum.