滩浅海地区海底电缆地震采集正交束线观测系统分析

摘要

The rapid development of seismic exploration equipment and technology made it possible for using high-density single point seismic acquisition technology. The differences of single point acquisition and array receiving were explored by using comparative analysis of Box wave data, single point acquisition, array receiving field test data and stack section in the middle mountainous area of Guizhou Province. It shows that the array receiving would reduce the domain frequency of seismic wave, and then impacts the resolution of the stack section) single point acquisition keeps the frequency components of the effective seismic waves, but the signal-to-noise ratio of seismic data was relatively low.%通过分析研究8L4S176T正交束线观测系统及其在复杂滩浅海区域施工时对接收设备、震源激发、二次定位和采集方法的要求,论证了该观测系统对于实现以提高中深层复杂构造成像精度和分辨率、衰减采集脚印为目的的地震采集在复杂海底应用的可行性.正交观测系统横向一次只滚动一个排列,有效避免了采集脚印的产生；根据不同水深采用不同的激发和接收方式,提高了轻型海底电缆地震资料的品质；声学定位、沿检波线激发等措施保障了采集效率.实际应用结果表明,该观测系统及其采集方法有效提高了地震资料信噪比,获得了更加丰富的波场信息,改善了成像精度.