河南东濮凹陷深层储层分析

从砂岩岩石学特征、砂体类型、成岩作用、孔隙特征、储层类型及储层发育的控制因素等诸方面对河南东濮凹陷深层储层进行了分析。东濮凹陷深层 (沙三3 -4 亚段 )岩性以粉砂、细砂岩为主 ,成分成熟度中等 ,结构成熟度较高 ,成岩作用强烈 ,碳酸盐胶结和长石的溶蚀是最主要的成岩事件。深层砂岩经历了 5个成岩阶段。砂岩孔隙度明显受深度控制 ,深层砂岩发育 4种类型的孔隙 ,以残余溶蚀孔隙为主。深层储层可划分为常规储层和非常规致密储层。深层储层主要受成岩作用、砂体类型、地层压力及油气藏形成的控制。

DEEP RESERVOIR ANALYSIS OF THE DONGPU DEPRESSION IN HENAN PROVINCE

This paper analyzes the deep reservoirs in the Dongpu sub basin on the basis of the sandstone petrographic features, sand body types, diageneses, pore features, reservoir types and the controlling factors for reservoir development. Lithologies of deep layers in the Dongpu sub basin (S 3 4 4 sub interval) are dominantly siltstone and fine sandstone, with the content of middle mature, structure of higher mature, and strong diagenesis. Carbonate sementing and feldspar corrosion are the main diagenetic events.The sandstones in the deep layers experienced five diagenetic phases and its porosity is obviously controlled by the depth to it. Four types of pores are developed of which remanent corrosive pores play a most important role.The deep layers can be divided into two types: normal reservoir and abnormal compacted reservoir.The deep reservoirs are mainly controlled by four factors: diageneses, sand body types, formation pressure, and oil and gas reservoir formation.