TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractAs production logging technology advances, more confident results are achieved in multiphase horizontal wells. There are a number of wells with unfavorable completions for production logging. In addition, operational difficulties are observed from time to time posing challenges. In any case, confidence in the determination of fluid entry intervals is required. Because of dynamic data acquisition, real time decisions are needed.