三维观测系统采集脚印定量分析技术

"采集脚印"是三维地震勘探中的一种地震噪声,是三维地震观测系统的固有属性,严重影响采集资料的振幅保真度及处理和解释效果。本文论述的三维观测系统采集脚印定量分析技术可定量描述三维观测系统接收、激发参数及施工方式与采集脚印的关系,综合考虑道距、接收线距、炮点距、炮线距、排列滚动线数、地层深度及变观方式等因素对形成采集脚印的影响,提供了从设计源头压制采集脚印、优化三维观测系统的方法。该方法在地震勘探实践中取得了良好的应用效果。

Quantitative analysis of 3-D geometry footprint

"Footprint",a kind of noise of 3-D seismic,is mainly depend on seismic geometry.It harms amplitude fidelity during data acquisition,and affect badly processing and interpretation.In this article,we propose a quantitative analysis method of 3-D geometry footprint,which describe quantitatively the relationship between receiver parameter,source parameter and operation procedure.Considering the influence factors on footprint,such as receiver interval,receiver line interval,source interval,source line interval,number of rolling lines,target depth,and geometry changes,this method can effectively suppress footprint from geometry design and optimize 3-D seismic geometry.