中原油田文东沙三中为深层低渗油藏 ,通过应用普通薄片、铸体薄片、扫描电镜、岩石物性、压汞试验等资料 ,对孔隙和喉道的类型及特征研究和评价 ,提出了研究区具三种孔隙结构类型 ,并作了应用数学地质方法进行孔隙结构分类的探索 ,对相同类型油藏的储层微观结构研究具有重要指导作用。 The Middle East Oilfield Wandongsan 3 is a deep reservoir with low permeability. Through the study and evaluation of the types and characteristics of pores and throats by using ordinary thin slices, cast thin slices, SEM, petrophysical properties and mercury intrusion tests, There are three types of pore structure in this area, and the application of mathematical geologic methods to explore pore structure classification is of great guiding significance to the study of reservoir micro-structure in the same type of reservoirs.