利用模型技术研究观测系统

LAYOUT STUDY BY MODELLING

地质矿产部第二物探大队

The 2nd Geophsical Exploration Parly, Ministry of Geology and Mineral Resources

本文用射线追踪程序对川东典型地质构造模型进行模拟采集,获得与各种简单观测系统相应的地震资料,分析讨论了影响复杂构造地区地震数据采集的不利因素.经反复修改和试验,设计出一种比较合理的灵活的复杂观测系统。结果表明,这种观测系统是提高埋藏浅、倾角陡、速度差异大的复杂构造地区野外地震数据采集质量的有效手段。

By using the technique of ray-tracing,a simulative data acquisition was carried out for a gelological structural model true to form in the eastern part of Sichuan Province. A large number of data were acquired with a series of different simple layouts. Disadvantageous factors effected on the data acquisition in areas with complex structures were examined. A complicated but appropriate and effective layout was designed after many experiments and modifications were made. It has been proved by practice that such a flexible complex layout is a useful tool in improving the data acquisition in areas with sleep-dipping shallow reflectors and great velocity differences.