Practice showed that the combination of CBL and ultrasonic impedance log provides accurate information about the cementation of cement sheath and the coupling of the cement to pipe and formation.

• 同时使用超声脉冲和CBL测井仪可以精确地确定水泥壳的胶结情况及水泥与套管、水泥与地层的胶结质量。用实例说明了基于超声脉冲声阻抗测井的声阻抗差分技术在检测泡沫水泥固井质量的应用效果。