摘要
在地球物理勘探中横波的实验室研究越来越受到重视。由于实验室中的横波受横波换能器及其性能、岩样尺寸及结构、测试位置及耦合剂等诸多因素的影响,所以在实验室中进行横波测试要比纵波观测困难得多。本文从介绍横波换能器的结构和性能着手,列举了不同类型横波换能器的使用方法和一些横波测试技巧。要获得高质量的横波测试效果必须注意以下事项:①仔细了解横波换能器的偏振特性;②蜂蜜和锡箔是最佳的耦合剂;③在均匀各向同性介质中,应使发收换能器的偏振重合;④岩样直径小于25mm时,要特别注意波振动模式的转换。
Study of S-wave in laboratory is paid more and more attention to in geophysical exploration. Affecting by many factors during test of S-wave in the laboratory, such as the characteristics of S-wave transducer, the size and structure of core sample,test position and coupler,the S-wave test and measurement in laboratory is more difficult than P-wave survey. Starting from knowing the structures and characteristics of S-wave transducer, the paper listed the use of various kinds of S-wave transducer and some skills of S-wave test and measurement. It's need to pay attention to follow-ing items in order to obtain high-quality of results of S-wave test: ①the polarizing characters of S- wave transducer is needed to carefully known; ②honey and tinsel are best coupler; ③the polariza-tion of transducer in transmitter and receiver must be coincident in uniform and homogeneous medi-um; ④it must pay attention to the conversion of vibrated mode when the radius of core sample is less than 25 mm.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2003年第6期630-635,共6页
Oil Geophysical Prospecting
基金
CNPC物探重点实验室基金项目(GPKL0205)。
关键词
地球物理勘探
横波测试
实验室
横波换能器
S-wave test and measurement, S-wave transducer, shear wave, torsional shear wave,polarization ,coupling
