PC-based acquisition and processing of high-resolution marine seismic data

摘要

We have improved the quality of high-resolution marine seismic data using a simple PC-based acquisition and processing system. The system consists of a PC, an A/D converter, and a magneto-optical disk drive. The system has been designed to acquire single-channel data at up to 60 000 samples per second and to perform data processing of seismic data by a simple procedure. Test surveys have been carried out off Pohang, southern East Sea of Korea. The seismic systems used for the test were an air gun and a 3.5 kHz sub-bottom profiling system. Spectral characteristics of the sources were analyzed. Simple digital signal processes which include gain recovery, de-convolution, band-pass filter, and swell filter were performed. The quality of seismic sections produced by the system is greatly enhanced in comparison to analog sections. The PC-based system for acquisition and processing of high-resolution marine seismic data is economical and versatile.