3D Seismic Data Processing Technology for Near Surface Effects Compensation Using Surface Waves Frequency Dispersion Curves

Seismic data processing nowadays meets new requirements during conventional 3D surveys. The key idea to meet these requirements is to use new seismic data processing approaches. One of the approaches is to use surface wave as a useful signal which is treated as noise in conventional seismic data processing. Surface waves travel along free surface and carry information about near surface properties which are expressed mainly in frequency dispersion. Surface waves area dispersion study may allow us to build detailed near surface velocity model. Joint surface and refraction waves velocity model may be built and further used for statics calculation and prestack depth migration. Another possible application of built velocity model may be direct linear waves modeling and consequent subtraction. This approach may help to preserve reflected waves signal especially at low frequencies and near offsets which can improve further low frequency inversion response and AVO-behavior