Study on fracture-cavity reservoir fracture-cavity unit division method in Tahe oilfield 4 block

With the development of Tahe oilfield Ordovician reservoir, the division of fracture- cavity unit shows great importance gradually.However there is no uniform model for fracture -cavity unit division of fracture- cavity carbonate reservoir. In this paper,three methods has been listed as examples, which are reservoir pressure trend analysis approach, well interference testing,tracer test respectively.These three methods has been applied in Tahe oilfield for unit division.