基于方位声波固井质量检测仪的 Ⅱ界面窜槽响应特性分析.

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. [ABSTRACT FROM AUTHOR]