Improved Method of Seismic Data Processing for Exploring Offshore Oil/Gas Field in the South China Sea

This paper mainly introduces a procedure to improve seismic data processing method for offshore oil and gas field exploration in the South China Sea. It includes not only researches on the marine seismic exploration system of large-scale multi-channel synchronous acquisition but also application of AVO (Amplitude Versus Offset) prediction method in seismic data processing. Firstly, this paper discusses a new method based on AVO prediction method to attenuate near-offset and residual multiples. Secondly, to achieve high performance of data acquisition synchronously, techniques of high precise clock distribution, real time propagation delay compensation algorithm implemented in FPGA hardware chip and high efficient system control protocol are designed. The propagation delay discrepancy of each digitizing module can eliminated automatically with the help of this method, and the whole system can achieve good performance of synchronization, real-time processing and reliability.