西湖凹陷深层储层特征及控制因素研究

利用岩心薄片、物性、扫描电镜、X衍射等分析资料,对西湖凹陷深层储集层进行了详细的物性特征、成岩特征及影响储层发育的主控因素的研究。结果表明,西湖凹陷深层储层以低孔低渗储层为主,深层普遍存在次生高孔带的"甜点";压实作用和胶结作用是导致深部储层物性变差的主要成因;溶蚀作用和超压作用是形成深层储层"甜点"的主要控制因素。

Study about Reservoir Characteristics and the Controlling Factors on the Deep Tight Gas Reservoir in Xihu Sag

Study has been conducted on reservoir physical property,diagenetic characteristics and the main controlling factors on the development of deep tight gas reservoir in Xihu Sag with the data of thin-sections of core,physical property data,scanning electron microscopy,X-ray diffraction and other analytical data.The study results show that the deep reservoirs of Xihu Sag are low porosity and low permeability reservoirs.Reservoir "dessert" with secondary pores is common.Compaction and cementation are the main factors leading to deep tight reservoir.Dissolution and overpressure are the main controlling factors for the development of these deep reservoir "dessert".