地震剖面分类与浅层三种波的层位对比

3种波指的是反射纵波,折射纵波,瑞雷面波.层位对比指的是3种波波场特征对比和它们各自反演所得的波速对比.对比的目的是为了确定剖面中形成3种波的地层及其层位,为3种波交叉渗透的联合反演奠定基础.本文所述内容是同时应用3种波,进行多波勘探方法理论的重要组成部分.为适应这种新型多波勘探的正、反演,文中首先以剖面中层数和相邻层之间波速大小关系为依据,介绍剖面分类与命名的方法,而后针对本文主题,论述利用3种波的波场特征和波速关系,进行层位对比的方法.

CLASSIFICATION OF SEISMIC PROFILES AND HORIZONTAL CORRELATION OF THREE SHALLOW WAVES

Three seismic waves illustrated in this paper refer to reflected compressional wave, refracted compressional wave and Rayleigh wave. The horizontal correlations means correlation of properties between wave fields of the three waves and correlation between seismic velocities obtained from their inversion results. The aim of the correlation is to determine the horizons as well as the strata that form the three waves in seismic sections and to provide theoretical basis for comprehensive inversion by means of cross association of the three waves. This paper is an important part of method and theory which can be used in simutaneous multitype wave exploration. It recounts the classification method and naming method based on the relation between velocity values in strata and between horizons in the section with the purpose of adopting this new forward and inversion technique for multitype wave exploraton. Finally, the paper discusses the horizontal correlation in the light of relationship between the wave field characteristics and the velocity values.