地震采集观测系统设计分析与探讨  

Analysis and study of seismic acquisition geometry design

作　　者：郭树祥[1] 

机构地区：[1]胜利油田分公司物探研究院,257022

出　　处：《油气地球物理》2009年第4期1-4,11,共5页Petroleum Geophysics

摘　　要：精细地震勘探需要有效合理的野外地震采集观测系统，排列长度和宽度是决定观测系统是否有效合理的重要参数之一。确定排列长度和宽度值，通常观测系统的设计主要考虑勘探地质目的层埋深、速度、动校正拉伸以及反射系数的要求，而对纵横向地质构造的成像需求忽略考虑。从叠前时间地震偏移成像理论出发，利用地层深度、构造倾角、地层层速度、反射时间和偏移距等信息，综合计算偏移孔径，导出野外采集排列长宽尺度计算方法。实例计算分析证明该方法具有可行性。An effective and rational geometry is necessary for fine seismic exploration. Array length ＆ width are important parameters to determine the efficacy of geometry system. Usually, geometry design consider target depth, velocity, NMO stretching, as well as reflection coefficient, in orderto decide the length ＆ width of the array, which didn＇t take vertical ＆ horizontal structure imaging into account. In this paper, based on the theory ofpre-stack time migration imaging, the target depth, structural dip, interval velocity, travel time, offset and other information to calculate the migration aperture comprehensively, and export calculation method for field array length ＆ width. An example is used to illustrate illustrates the feasibility of this method.

关 键 词：排列分析 成像孔径 排列长度 排列宽度 实例分析 

分 类 号：P631.443[天文地球—地质矿产勘探] P618.13[天文地球—地质学]