第一菲涅尔带半径与地震资料的横向分辨力  

The first Fresnel zone radius and lateral resolving power of seismic data.

作　　者：王绪松[1] 钱雪峰[2] 李波涛[1] 

机构地区：[1]中国科学院地质与地球物理研究所,北京100029 [2]中国石油集团东方地球物理勘探有限责任公司,河北涿州072751

出　　处：《勘探地球物理进展》2006年第4期244-248,共5页Progress in Exploration Geophysics

基　　金：中科院重大创新项目(KZCX1-SW-18)。

摘　　要：对第一菲涅尔带半径的物理概念进行了剖析,指出它代表该带内地震能量同相加强,并不能代表两个砂体相隔多远时才能被认为是两个砂体这一物理过程。针对目前地震资料横向分辨力计算方法在概念上的混淆,从光学分辨力的定义出发,利用瑞利判据,推导了一种新的计算公式。推导结果表明,在实际资料处理中,这两个公式的数值结果相差无几。可以将第一菲涅尔带半径作为地震资料横向分辨力的一种近似。The physical concept of the first Fresnel zone radius was dissected. It was pointed out that the first Fresnel zone radius means cophase seismic energies enhanced in the zone, and it is unable to manifest the physical process of two isolated sands integrating into a single big sand when the two sands get closer. To clarify the conceptual misunderstandings of current lateral resolving power computing methods, the author deducted a new computing formula from Rayleigh criterion and the definition of optical resolving power. It is showed that those two formulae are equivalent numerically. The first Fresnel zone radius can be treated as lateral resolving power of seismic data approximately.

关 键 词：横向分辨力 第一菲涅尔带 衍射孔径 瑞利判据 

分 类 号：P631.4[天文地球—地质矿产勘探]