首波、模式波及井孔全波时域波列的数值模拟与分析

The numerical simulation and analysis on the head wavesmodes and full waveform in borehole

运用准弹性地层下的点声源裸眼井模型,分别采用SMF支割线积分围道和竖直路径积分围道,用科希定理计算了分波(首波、横波及模式波),并同时用实轴积分法计算了全波.结果表明,不同积分围道的分波之和都与全波相符合.通过对比和分析,揭示了井孔声波中不同成分波的相互转换和作用规律.

<Abstrcat>In this paper,the borehole model with point source under the quasi-elastic formation is adopted.According to Kexi rule,the SMF branch-cut integral path and the vertical integral path and calculated the head waves and mode waves are chosen.With comparison and analysis,the regulations of interaction and their conversion are found.