Application of the Broadband Seismic Acquisition in Huizhou Sag, Pearl River Mouth Basin, China

Abstract

The Huizhou sag of the Pearl River Mouth Basin is one of the first areas to try to operate the broadband seismic acquisition with variable-depth streamer in the offshore seismic exploration of China. Different from the conventional acquisition, the streamer of the broadband seismic acquisition is depth variable. Through broadband seismic acquisition and processing, the ghost waves can be effectively identified and removed to broaden the seismic frequency band. In order to make good use of the broadband seismic data, we firstly test the reliability of broadband seismic data through a forward model and post-stack seismic inversion. Then the targets in Huizhou sag is taken as an example to do the inversion experiments. The results show: the broadband seismic acquisition can effectively suppress the interference of the wavelet side-lobe and the multiples and can obviously improve the signal-to-noise ratio; meanwhile, it can enhance the accuracy to identify the thickness of the reservoir and can improve the fidelity of seismic data.