关键词: 测井, 测井解释, 碳酸盐岩, 储层类型, 导电效率

Abstract: This paper puts forward a method to distinguish reservoir types in carbonate formation based on the electrical conduction efficiency.Relationships between the rock electrical conduction efficiency and the cave size,fracture width,and throat diameter are presented.These relationships show that, 1) In the condition that only fractures and caves exit,the electrical conduction efficiency of the rock increases rapidly along with the increasing of fracture width, especially when caves are small; 2)When only throats and caves exist,the electrical conduction efficiency of the rock increases along with the increasing of throat diameter; 3) The electrical conduction efficiency of the rock decreases along with the increasing of cave size.Thus,the rocks electrical conduction efficiency is high when fractures exit in rocks,while low when caves exits. Electrical conduction efficiency can be used to distinguish types of carbonate reservoir.This method has been applied in the Ordovician carbonate reservoir located in the middle of the Tarim Basin of China with good results.

Key words: well logging, well logging interpretation, carbonate rock, reservoir type, electrical conduction efficiency