Abstract: At the late stage of oil development, oil remaining detection could become a tough problem to solve during the reservoir monitoring. RMT logging technique has been effectually applied in Huabei oilfield. It's been proved that C/O mode measurement of RMT logging tool could be well used for the reservoir evaluation in the condition of above 12% porosity and middle or low salinity. By RMT logging data, the fluid property or oil sheet could be distinguished. Also the water flooded zone and the oil remaining saturation could be obtained. At the same time, the oil reservoir could be found out, which could not be detected be conventional logging technique. Truly RMT logging tool has the unique performance which could not be substituted by any other logging tool.