Borehole Calibration of the High Frequencies Filtering and Attenuation in the Paris Basin

It is possible to widen the frequency content of the seismic by using vibrators which<br>are designed to generate sweeps up to 200 Hz. Emitting these high frequencies therefore<br>comes into conflict with the limitation imposed by their filtering at the surface (array,<br>weathered zone) and their attenuation as they propagate into the subsurface.