黄土塬斜坡带三维地震数据采集难点及对策

发布时间：2018-01-08 12:10

本文关键词：黄土塬斜坡带三维地震数据采集难点及对策　出处：《地质科技情报》2016年06期 　论文类型：期刊论文

【摘要】：针对黄土塬斜坡带地震采集的技术难点,分析了斜坡效应及其主要影响因素,提出了地震波激发"能量窗"及"波场矢量叠加"的理论,采用"优选点位法"微测井技术,准确建立了地震地质模型,应用谱元法对激发-接收参数进行了系统的数值模拟。在此基础上,开展点-线结合的野外试验,量化分析试验的效果,确定了以超多井、小药量、线性组合、聚能层激发为特点的激发参数,以多检波器、矩形面积、中等基距组合、高叠加次数为特点的接收参数,获得了高分辨率的三维地震资料。
[Abstract]:In view of the technical difficulties of seismic acquisition in the slope zone of loess plateau, the slope effect and its main influencing factors are analyzed, and the theory of "energy window" and "wave field vector superposition" of seismic wave excitation is put forward. The seismogeological model is established accurately by using the micro-logging technique of "optimal location method", and the excitation and receiving parameters are systematically simulated by the spectral element method. On this basis, the field experiments of point-line combination are carried out. The effect of quantitative analysis is analyzed, and the excitation parameters characterized by ultra-multi-well, small charge, linear combination and shaped layer excitation are determined. The combination of multi-geophone, rectangular area and medium base distance is used. High resolution three-dimensional seismic data are obtained by receiving parameters with high stacking times.
【作者单位】：中国地质大学(武汉)地球物理与空间信息学院;中国石油化工集团公司华北分公司勘探开发研究院;中国石油化工股份有限公司油田勘探开发事业部;
【基金】：国家重大科技专项“大型油气田及煤层气开发”(2011ZY05002-001)
【分类号】：P631.4
【正文快照】： 黄土塬区地震勘探是一个长期攻关的难题[1-3]。二维地震勘探阶段,在冲沟区弯线采集、黄土塬直线观测、黄土塬宽线观测等方面,以强化组合法[4-6]为特征的采集及相应的处理方法[7-9]取得了较大的进展。然而,对于黄土塬斜坡带关注较少。同样,在三维地震勘探阶段,一般采用优化设计

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