三种纵横波检波点静校正方法应用对比  

作　　者：刘劲松 黄培东 夏璠 范秦军 吴志芳 

机构地区：[1]中国地质大学(北京)地球物理与信息技术学院“多波多分量”研究组,北京100083 [2]黄河勘测规划设计研究院有限公司,河南郑州450003 [3]仲恺农业工程学院信息科学与技术学院,广东广州510225

出　　处：《科技创新与应用》2022年第9期1-6,共6页Technology Innovation and Application

基　　金：国家自然科学基金项目(U1839208,41425017)资助。

摘　　要：PS波携带的信息能弥补单纯应用PP反射波的不足,但PS波处理流程复杂,其中静校正是一个主要难点。介绍3种主要的PS波检波点静校正方法——比例系数法、基于共检波点道集的单层位与多层位约束Trim静校正法;并以山西武乡复杂地表和浅层结构试验区采集的二维三分量地震数据和淮南地区三维三分量地震数据的PS波静校正处理为例,对比3种方法的叠加效果。测试表明,传统比例系数法存在较大局限性;基于非地表一致性,转换波检波点静校正量随时间和空间变化;Trim校正方法以纵波同相轴形态为约束,用统计方法来计算检波点PS波静态时移,较好地解决PS波的检波点静校正问题,提高PS波的成像精度;但该方法需要PP波反射层位的约束。The information carried by PS wave can make up for the deficiency of simple application of PP reflected wave, but the processing flow of PS wave is complex, in which static correction is a main difficulty. This paper introduces three main PS wave detection point static correction methods-proportional coefficient method, single-layer and multi-layer constrained Trim static correction method based on common detection point gather, and compares the superposition effects of the three-dimensional PS wave static correction processing of two-dimensional three-component seismic data collected from complex surface and shallow structure test area in Wuxiang, Shanxi Province and three-dimensional three-component seismic data in Huainan area. The test results show that the traditional proportional coefficient method has great limitations;based on the non-surface consistency, the static correction of the converted wave detection point varies with time and space;the Trim correction method is constrained by the shape of the longitudinal waves in-phase axis, and the statistical method is used to calculate the static time shift of the PS wave at the detection point, which more effectively solves the problem of static correction of the PS wave and improves the imaging accuracy of the PS wave;but this method needs the constraint of the reflection layer of the PP wave.

关 键 词：三分量 PS波 静校正 共检波点道集 Trim法 

分 类 号：P631.4[天文地球—地质矿产勘探]