Abstract: The characteristics of the low resistivity oil layers in Baobei Block in Baolang oilfield, Yanqi Basin are studied in respect to the lithological, electrical, physical and oiland gas bearing properties and microscopic reservoir properties. Medium to high formation water salinity andhigh irreducible water saturation are the main factorsresulting in the low resistivity oil layers in this block. This paper presents some qualitative methods applied to recognize these oil layers in this block which provide geologic basis for more accurately identifying this kind of oil layers through logging.