Abstract: To address technical challenges such as the deficiencies of traditional cement quality inspection tools in evaluating low-density cement and the distortion of casing eccentricity detection results in well intervention operations, and to achieve the goals of annular medium type detection, cement top measurement, cement quality evaluation, and casing eccentricity detection during well intervention, a drill-string-conveyed circumferential ultrasonic imaging logging tool was designed (with a multi-sector strip-type transducer design), and the influences of factors such as the tool body, operating frequency, casing thickness, annular media behind the casing, and casing eccentricity on the tool’s detection characteristics are simulated and analyzed. The results indicate that the impact of the strip-style tool body on Lamb wave and resonance wave signals is negligible. The combination of Lamb wave array four-receiver attenuation rate and resonance efficiency measurement methods can effectively distinguish the media behind the casing and evaluate casing eccentricity. Casing eccentricity significantly affects the secondary reflection echoes of Lamb waves and causes measurement deviations in resonance efficiency on the eccentric side. The findings provide valuable guidance and theoretical support for instrument design, data processing, and interpretation.