靖安油田白于山西区长4+5_2储层特征研究

Research on characteristic of Chang 4+5_2 reservior in the west area of Baiyu mountain of Jing'an oilfield

通过铸体薄片,扫描电镜鉴定,以岩心物性、压汞实验等资料分析为基础,对白于山西区长4+52储层特征进行研究。结果表明:该段岩石类型为极细-细粒岩屑长石砂岩为主;孔隙结构以粒间孔和长石溶孔等次生孔隙为主;储层物性较差,为低孔特低渗储层,储层物性受沉积相、成岩作用及裂缝的控制。通过本次储层特征研究,为后续见产开发提供地质依据。

The charateristics of Chang 4＋52reservior in the west area of Baiyu mountain are studied based on the data analysis of casting thin-section,scanning electron microscope,core physical properties,mercury porosimetry measurements.The results show that the main rock type of the reservior is very fine-fine grained lithic arkose.The pore structure is mainly composed of secondary intergranular pore and feldspar dissolved pore.The reservior is of physical property of low porosity and super-low permeability.The physical property of the reservior is affected by sedimentary facies,diagenesis and fracture.Through the study of the reservoir characteristics,it can provide geological basis for subsequent production development.