Topic description

Context 

Seismic imaging offers a unique way of finely characterising the subsurface by sending waves from the surface. In the context of CO2 injection and storage, the subsurface properties vary over time. It is therefore essential to repeat the acquisition and to analyse any modifications. However, 4D dense acquisitions (repeated 3D imaging over time) are not affordable for economic reasons.

Based on an initial 3D image, SpotLight Earth has developed a strategy for deploying a few sources and receivers at optimal locations to detect the evolution of the CO2 plume within the subsurface. This makes it possible to repeat the acquisition monthly, for example, rather than every two years for the standard approach. This is an important factor for controlling the integrity of the reservoir and for preventing any CO2 leakage towards the surface. 

Currently, the analysis of such sparse acquisition data sets is based on ref...