Near surface models derived from ground roll, guided waves and Scholte waves

Near surface models derived from ground roll guided waves and Scholte waves Everhard Muyzert (Schlumberger Cambridge Research) SUMMARY____________________________________________________________ In normal exploration practice we make strenuous efforts to remove the effect of ground roll and other sources of self noise from the recorded data. We do this in the field with arrays and in the computer with sometimes complex processing schemes. Most of this so called self noise is a representation of the source wave field's response to the Earth and hence it should be usable as signal to provide extra information about the Earth and in particular about the near