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Since July 2008, CO2 is injected into a saline aquifer near the town of Ketzin in Germany. For monitoring the CO2- migration close to the injection well, TNO installed a fixed 2D seismic array of 120 meters length in 2009, with 3- component geophones at the surface, 4-component receivers at 50 meters depth and a central vertical array of 4- component receivers. This specific test acquisition set-up...
The mathematics of the propagation of seismic energy relevant in seismic reflection experiments is assumed to be governed by the linear acoustic wave equation, in which the coefficient is the speed of sound in the subsurface. If the speed of sound suddenly changes, the seismic signal is (partly) reflected. To find the position of these changes one considers first the so-called forward map, which...
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