Well performance evaluation is crucial for enhancing hydrocarbon recovery, particularly in mature and geologically complex reservoirs. This study applies Stingray Production Logging Tool (PLTs) to evaluate zonal inflow contributions and identify flow anomalies in a producing well from the Messla Field, located in the Sirt Basin, southwestern Libya. The well, completed in a shaly sandstone reservoir with variable porosity and water saturation and was logged using a suite of PLTs including spinner, temperature, pressure, and fluid identification sensors. Interpretation of the PLT data revealed that approximately 60% of the total oil and gas production of 2650 STB/D and 1189 Mscf/D originated from the second perforations (8761' - 8770'), while the other intervals contributed 40 % despite favorable petrophysical characteristics with no water cut. Temperature and spinner profiles also indicated no cross flow in, behind casing, or from plug. During shut in and flowing regime, spinner data indicated that there is not cross flow observed between intervals. The integrated analysis provided actionable insights for zonal shutoff recommendations and optimization of well productivity. These findings demonstrate the practical value of PLT-based diagnostics in identifying hidden production inefficiencies and guiding reservoir management decisions in the Messla Field.................... Keywords: ................Capacitance sensors, Gradiomanometer, Pressure Sensors, Spinner Flowmeter, Temperature Log Production logging tool.