【摘要】 Ⅱ界面(水泥-地层界面)窜槽探测是目前固井质量评价面临的技术难题之一。介绍了第二代方位声波固井质量检测仪(azimuthally acoustic bond tool 2.0,AABT2.0)的结构和原理，利用有限差分算法对不同Ⅱ界面窜槽情况进行了模拟，分析了该仪器在确定水泥窜槽的中心方位和角度范围的效果。数值模拟结果表明，通过分析相控圆弧阵声波接收站中不同方位阵元接收到的套管波首波幅度，可以获得窜槽的中心方位；与独立接收模式相比，基于相控圆弧阵声波接收站的扫描接收模式能够更为准确地获得窜槽的角度范围；通过对数归一化成像显示，可以直观地获得不同深度段的窜槽分布情况。研究结果为之后AABT2.0实际资料的处理奠定了理论基础。更多还原

【Abstract】 Channeling detection at the interface Ⅱ(cement-formation interface) is a key technical problem in the cementing quality evaluation. The structure and principle were introduced for the second generation of azimuthally acoustic bond tool(AABT2.0). Different channeling situations at the interface II were simulated using the finite difference algorithm, and the application effects of AABT2.0 were analyzed in determining the central azimuth and angle range of the channeling. The numerical simulation results show that the central azimuth of the channeling can be obtained by analyzing the amplitudes of casing waves received by different azimuth array elements in the arcuate phased array(APA) acoustic receiver station. Compared with the individual-reception mode, the measurement accuracy of the angle range is greatly improved when the APA acoustic receiver station works in the scanning-reception mode. The channeling distribution in different depth sections can be obtained intuitively by logarithmic normalized imaging. The work of this study lays a theoretical foundation for the processing of AABT2.0 actual data.更多还原