二维地震勘探满覆盖次数均匀性理论设计的研究

Research on the Theoretical Design of Full Fold Number in 2D Seismic Survey

二维地震勘探观测系统设计时,满覆盖次数理论设计应该为常数,均匀分布,但当最小偏移距大于0.5倍道距时,满覆盖区域覆盖次数理论设计可能出现变化现象。通过对此现象发生的原理分析、总结,最终得出了满覆盖区域覆盖次数理论设计稳定时影响满覆盖次数的3个关键因素,即最小偏移距、炮间距和接收道数,及其对应的关系,在实际应用中得到了较好的效果。

The theoretical design of full fold number should be a constant, distributed uniformly in the geometry design of 2D seismic survey. The fold number maybe change in the full fold area when the minimum offset is more than half of receiver interval. The paper obtains the relationship about the minimum offset, source point interval and the number of active channels by analyzing and concluding the principles appeared in the stable period of the theoretical design of full fold area, achieving good results in the actual application.