Abstract: The Lower Paleozoic dolomite reservoir in sub-salt and buried hill is widely distributed in Tarim Basin, with multiple types of oil and gas reservoirs, which is the characteristics of typical superimposed composite basin and have good prospects for petroleum exploration. Fracture-vuggy type reservoir is the most representative and favorable among dolomite reservoirs. Fine evaluation of fracture-vuggy type reservoir is helpful to improve geological understandings and reservoir identifi cation in the region. First, the fracture-vuggy type reservoir can be classifi ed into two sub-categories based on the pore features by core observation both microscopically and macroscopically, as well as petrophysical experiments, i.e., simple combination type and dissolution enlargement type. Then, the logging response characteristics of two sub-categories of fracture-vuggy type reservoirs are analyzed by using electrical imaging logging and conventional logging data, and the characteristic parameters are extracted, such as peak of porosity spectrum, width of porosity spectrum, deviation of acoustic velocity, fracture porosity and matrix permeability. Finally, the semi-quantitative discrimination chart for classifi cation of reservoir type is established by combining with application examples. The results show that the method of combining electrical imaging logging and conventional logging has good application result in identifying reservoir types. The dissolution enlargement type fracture-vuggy dolomite reservoir of sub-salt is the most developed in Tazhong area, while the simple combination type fracture-vuggy reservoir is dominated in Tabei area. This classifi cation method is of great practicability and generalization.