Abstract: Pore structure in carbonate reservoir influence greatly conductance, distribution of pore fluid, productivity and reserves. To distinguish the type of carbonate reservoir is the first step in evaluation of this reservoir. Ordovician strata in Tahe oilfield belong to carbonate reservoir with well developed fractures and dissolution pores. Using conventional well log data to calculate the conductance can be able to well recognize the reservoir type. In light of Tahe oilfield, the method and standard to recognize the reservoir type by conductance are presented. Case study shows that this method is suitable to Tahe oilfield.

Key words: Tahe oilfield, carbonatite, well log, conductance, reservoir type