三维地震勘探固定排列与中点放炮观测系统

Field Setup of Fixed Array and Midpoint Shooting in 3-dimensional Seismic Prospecting

三维地震勘探观测系统的模式较多,以常规束状观测系统的应用较为广泛。针对勘探区目的任务选择合理的观测系统以有利于勘探效果,是勘探前期施工设计的基本要求。三维地震勘探固定排列与中点放炮两种新型观测系统,均可使炮点在勘探区内呈地段性分布,与常规束状观测系统炮点在勘探区呈分散分布有所不同。在满足多次叠加提高分辨率的同时,能够使施工排列的滚动次数明显减少,从而使野外数据采集工作效率得以有效提高,并降低了生产成本,扩充了施工设计选择观测系统的范围,在三维地震勘探行业具有一定的实用价值。

There are many modes of field setup in the3-dimensional seismic prospecting,and the conventional bunched field setup is applied more widely.Aim at prospecting object and task to elect reasonable field setup in favour of prospecting effect,is basic requirement of design and construction in earlier stage of prospecting.Both new types of field setup that fixed array and midpoint shooting of3-dimensional seismic prospecting,are all make shotpoints showing sectional distribution in prospecting area.In the meantime to satisfy multitime stack and heighten resolution,can be reduced clearly rolling frequency of constructional array,thereby heighten efficiency of data collection in the field,and reduced production cost,expand election scope of field setup in design and construction,there are certain practical value in the3-dimensional seismic prospecting profession.