海上双源随机激发采集处理技术研究及应用

Research and Application of Acquisition and Processing Technology of Marine Dual Seismic Source Random Shooting

海上双源随机激发的采集方式,是以两个气枪震源、以一定编码方式近似同时地随机激发的采集方式, 以获得时间空间相互干涉的琨叠炮记录,能极大地加快数据记录速度,提高采集效率;同时,可以满足宽方 位的地震资料采集对炮距、道距、方位角、偏移距分布等采集参数的最佳要求,是海上地震勘探技术的革新. 海上随机源地震技术实现的关键,是将采集到的多震源琨叠数据进行波场分离处理.此课题研究了海上双源 随机激发的采集作业方式和激发规则,开发了随机激发控制系统,实现了海上拖缆的双源随机激发地震资料 采集;同时,研制出基于多域迭代的自适应矢量中值滤波法分离混叠波场的软件,实现了海上随机激发地震 数据的处理.

In acquisition of random shooting of dual seismic source in marine seismic exploration, two air-gun sources are approximately synchronically excited by certain encoding, and then data of seismic source blended in time-space domain can be obtained. In this w a y, the speed of recording data is greatly enhanced, and acquisition efEiciency is improved. It can also fulfill the Acquisition parameters in azimuth seismic data acquisition , such as shot interval , channel interval , azimuth and offset are optimized. The key issue for marine seismic source random shooting is the separation of blended data with multiple shots. Acquisition method and shooting rule in marine seismic exploration are researched, and a random shooting control system is developed. Software based on multi-domain iterationis developed for separation of blended wave field and data processing.