Key techniques for slant streamer wide-band and wide-azimuth seismic data processing and their application to P Gas Field of Xihu Sag

In the P Gas Field of the Xihu Sag, the slant streamer broadband and multi-ship wide azimuth acquisition techniques are applied, which produced continuously ghost waves with various trap frequencies. Efforts are devoted to suppress the ghost wave as much as possible to obtain the broadband wide azimuth seismic data with high signal-to-noise ratio and high fidelity. The wavelet zero-phase and de-bubble processing techniques are adopted. As the results, the one dimensional filter operator inversion technique and sparse τ-p inversion technique suppressed effectively the ghost waves of seismic source, removed the multiple waves, broadened low-frequency and high-frequency information, both the signal-to-noise ratio and the resolution of seismic data are improved. Through comparison with actual data, it is concluded that this method can obtain better processing results, and produce better seismic profiles.