炮检距属性的非均匀性系数分析  

The nonuniformity coefficient analysis for offset attribute

作　　者：赵虎[1,2] 尹成[2] 陈光明 李轩波 

机构地区：[1]成都理工大学"油气藏地质与开发工程"国家重点实验室,四川成都610059 [2]西南石油大学资环学院,四川成都610500 [3]川庆钻探地球物理勘探公司,四川成都610213

出　　处：《石油地球物理勘探》2011年第1期22-27,164+168,共6页Oil Geophysical Prospecting

基　　金：国家重点基础研究计划(973)"南海深水区复杂地质结构地震采集基础理论研究"(2009CB219403)项目;西南石油大学科技基金联合资助

摘　　要：三维地震观测系统中炮检距均匀分布一直是野外地震采集设计的目标,炮检距分布对速度分析和叠加成像精度都有很大影响。目前人们对三维地震观测系统属性进行定性分析和评价的主要手段是炮检距分布属性图。本文将炮检距分布与覆盖次数和最大炮检距联系起来,提出了定量化分析公式和非均匀性系数的新概念,用以描述每一个面元炮检距分布的均匀性状况。通过对四种不同类型束状观测系统和四种不同横纵比正交观测系统的炮检距非均匀性系数分析,定量地推断出炮检距相对最为均匀的观测系统,为地震勘探观测系统设计中炮检距均匀分布评价提供了新的方法和手段。Offset uniform distribution is always the goal in geometry designing for seismic acquisition as the offset distribution has severe influence to velocity analysis and stacking imaging precision.Nowadays our main tool to evaluate a geometry designing and to conduct qualitative analysis for the performance of the geometry is the offset distribution attribute map.In this paper by linking the offset distribution and folds/maximum offset,the quantitative analysis formula and the nonuniformity coefficient new concept were introduced,and they are used to describe the offset uniformity status for each bin.By conducting analysis of offset nonuniformity coefficient for 4 kinds of track group recording geometry and orthogonal geometry with different aspect ratios,the most evenly distributed geometry was quantitatively derived,providing the new method and means for geometry designing in seismic acquisition.

关 键 词：三维观测系统 炮检距 非均匀性系数 观测系统设计 覆盖次数 

分 类 号：P631[天文地球—地质矿产勘探]