【摘要】 振动波衰减系数是正演射孔信号评估射孔质量的重要参数之一,本文基于振动力学的冲击衰减振荡模型,提出了一种基于包络检波的射孔振动信号衰减系数计算方法。根据射孔振动信号的特点,设计了不同参数Butterworth带通滤波器处理射孔信号,以减小噪声对衰减系数计算的影响。研究结果表明:在适当的滤波参数条件下,套管中振动衰减系数最小相对误差可达6.56%。更多还原

【Abstract】 Vibration attenuation coefficient is one of the important parameters for evaluating perforation quality by forward perforation signal. A new calculation method of perforation vibration wave attenuation coefficient is put forward based on the impact attenuation oscillation model of vibration mechanics. According to the characteristics of perforating vibration wave and its noise,the Butterworth band-pass filters with different parameters are designed and they are used for processing these signals to decrease the influence of the noise on the attenuation coefficient calculation. The research result shows that the minimum relative error of casing vibration attenuation coefficient can reach to 6. 56% under appropriate filter parameters.更多还原