靖安油田大路沟二区长6储层特征及其控制因素研究

Reservoir Characteristics and Control Factors in Chang6 Reservoir of Dalugou Area2 of Jing'an Oilfield

根据岩心观察、岩石薄片、铸体薄片、压汞分析、测试、测井等资料的分析,对大路沟二区长6储层的岩石学特征、孔喉特征、孔隙结构及孔渗特征等进行了深入研究,并分析了其控制因素。研究表明,大路沟二区长6储层岩性主要为中-细粒长石砂岩,其次为岩屑长石砂岩。储集空间主要为粒间孔及溶蚀孔,小孔细喉及小孔微喉的组合为基本渗流通道,为典型的低孔储层。储层物性平面上受沉积相带控制,垂向上压实作用和胶结作用使储层物性变差,溶蚀作用在一定程度上改善了储层物性。根据岩性和物性分析可将储集岩分为好、中、差3类,主力油层621主要为好储层。

By analyzing the data of core observation,thin sections of sandstones,thin section of cast,mercury penetration analysis,testing and logging data analysis,petrological characteristics,pore throat feature,gap composition and characteristics of porosity and permeability are studied in Chang6 Reservoirs of Dalugou Area2,and its control factors are analyzed.Research shows that the main reservoirs lithology of Chang6 Dalugou Area2 is mid-chondro arcose,the second is lithic arkose.The main reservoir space is intergranular pores and corrosion pores,the association of microbore slenderlarynx and microbore tinyarynx which is fundamental and infiltrating fluid passageway,representative low hole reservoir.reservoir physical property in plane is controlled by sedimentary facies,vertical compaction and cementation make reservoir physical property became worse,denudation improves reservoir physical properties at a certain extent.According to the lithology and physical property,reservoir rocks can be divided into three types of good,middle and poor,main oil layer 612 is a good reservoir.