The basement carbonate reservoirs, in the Karabulak oilfield of the Southern Turgay basin, have the characteristics of complex structure, variety of pore type and strong heterogeneity. And the identification of such reservoirs by single conventional logging method is always a difficult point in logging interpretation. In this paper, the response characteristics of conventional logging curves such as deep lateral resistivity, acoustic time difference, density and compensated neutron are used for reconstruction. Combined with the improved method of curve change rate, the response laws of fractured carbonate reservoirs, pore-cave reservoirs and fractured vuggy reservoirs on conventional logging curves are summed up respectively. And a new logging evaluation method for carbonate fractured vuggy reservoirs in the Karabulak oilfield of South Turgay basin is proposed. This method is used to identify reservoirs in K8 and K34 wells of this oilfield. The results show that the carbonate reservoirs in this area are mainly fractured-vuggy  type. Compared with the oil test conclusion and imaging logging, the method proposed in this paper accurately divided the reservoir type. And the efficiency and accuracy of the reservoir division have been greatly improved.