用有限元法研究了当井中存在水平裂缝时的声波全波列 ,并对裂缝宽度对低频斯通利波的影响进行了数值分析。当井中存在水平裂缝时 ,在接收的声波全波列波形中 ,既有直达的斯通利波 ,也存在来自裂缝的反射斯通利波。数值计算结果与实验测量结果具有很好的一致性。计算结果表明 ,裂缝宽度越大 ,反射斯通利波的幅度也越大 ,而直达波幅度变小 Finite element method is used to study the full wave train of sound waves when there is a horizontal crack in the well and the numerical analysis of the effect of crack width on low frequency Stoneley wave is made. When there is a horizontal crack in the well, there are both the direct Stoneley wave and the reflected Stoneley wave from the crack in the received full wave train of sound waves. The numerical results are in good agreement with the experimental results. The calculation results show that the larger the crack width is, the larger the amplitude of reflected Stoneley wave is and the smaller the direct wave amplitude is