摘要
本文简要介绍了井孔声场二维谱的计算方法,实现了对不同井径井孔中的声场二维谱和声场模拟计算,得到了不同井径井孔声场二维谱的分布图以及声压波形图.通过对不同井径井孔中声场二维谱的特征分析,讨论了不同井孔中的声波场中的纵波、横波以及各种模式渡的特征.通过对比二维谱可以明显地看出纵波、横波以及各种模式波均受井径变化的影响.实践证明井孔声场二维谱能够直观地显示出不同井径中声场传播的特征.
This article briefly introduces the method on the numerical calculation for the two-dimensional spectrum about acoustic wave propagation in a borehole and accomplishes the two-dimensional spectrum and the receiving acoustic pressure waveform with different diameters. According to the images of two-dimensional spectrum of different well diameters it discusses the characters of the P-wave, S-wave, and mode waves with the change of the well diameter. The practice proves that the two-dimensional spectrum can he used to display the characters of acoustic wave propagation in different boreholes with different well diameters.
出处
《地球物理学进展》
CSCD
北大核心
2009年第3期988-993,共6页
Progress in Geophysics
基金
国家自然科学基金项目(40874059)资助.
关键词
井径
声波测井
二维谱
well diameter,acoustic logging,2-D spectrum
