复杂地表条件下震源组合的应用

摘要

Excitation and reception are two main factors affecting the quality of the seismic field data collection,especially the choice of excitation parameters directly determine the success or failure in a work construction area,in the area with complex geological condi⁃tions,sometimes it seems to be powerless to use explosive as excitation modes,and this becomes bottlenecks of improving signal⁃to⁃noise ratio and resolution of seismic data.The vibroseis may be better than dynamite source to collect seismic data.On the basis of careful anal⁃ysis of previous data,through the comparation of explosive source and vibroseis,explosives and vibroseis were combined and excitated alternatively according to their respective application conditions of two sources.Using the forward model to determine the parameters of the reception,it made a good geological effects.%激发和接收是影响地震野外数据采集质量的2个主要因素，尤其是激发参数的选择直接决定了一个工区施工的成败，在地震地质条件复杂的地区，以炸药为震源的激发方式有时显得无能为力，成为提高地震资料信噪比和分辨率的瓶颈，而可控震源可能要比炸药震源采集到的地震数据质量更好。在分析以往资料的基础上，通过炸药与可控震源的试验对比，依据2种震源各自的应用条件，进行炸药与可控震源组合交替激发，采用正演模型确定的接收参数，取得了良好的地质效果。