大倾角山地三维地震勘探采集难点及其对策

Difficulties and Countermeasures Regarding the Three-Dimensional Seismic Exploration in the Mountains with High Inclination Angle

长久以来,在地层倾角较大的山地地区开展三维地震勘探工作一直面临着野外数据采集方面的技术难点,这些难点在很大程度上制约了三维地震勘探技术本身的发展以及这一勘探手段在这类地区解决实际地质问题方面的能力。而作为野外数据采集过程中最基本的环节,观测系统的设计也就成为了最大的难点之一。结合山西某典型的大倾角山地地区三维地震勘探实例针对这一难点进行了探讨,通过对这一勘探实例在野外地震资料采集中观测系统设计方法及相应效果的分析,总结得出了在此类地区进行三维地震勘探时针对这些采集难点所采取的有效对策。

As is known to us all,the three-dimensional seismic exploration method has been faced with a large quantity of difficulties in the aspect of data acquisition in the mountains with high inclination angle for a long time,which restricted the development of the seismic exploration technology as well as its corresponding capability in solving the geological problems in such kind of area.As the elementary part of the procedure of data acquisition,observation system design has been proved to be one of the toughest difficulties.This paper based on a three-dimensional exploration example in a typical area with high inclination angle in Shanxi province,from the discussion of the effect of the observation system designing method adopted in this exploration example,the effective measures taken in dealing with the difficulties in data acquisition of the three-dimensional seismic exploration in such areas has been worked out,which may provide certain instructive significance to the seismic exploration technology in similar areas.