摘要
台北凹陷第三系含油储层岩性以细砂岩为主,岩石学类型以岩屑长石砂岩和混合砂岩为主,含气储层岩性以砂砾岩为主,岩石学类型为岩屑砂砾岩。储层微观储集特征发育剩余原生粒间孔、粘土矿物杂基内的微孔隙及微裂缝等储集空间类型。孔隙结构以中孔、细喉道为主,为中高孔、中—低渗型储层。通过对储层物性影响因素的研究认为,岩石组构、沉积微相、成岩作用是影响该区储层物性的主要因素;碳酸盐胶结物及自生粘土矿物导致储层物性变差;粘土矿物在转化过程中释放的酸性水对碎屑颗粒和胶结物的溶蚀作用及烃类的后期注入在一定程度上起到了对储层原生孔隙的改善和保存作用。
Lithology of Tertiary oil bearing reservoir in Taibei Sag is mainly fine sandstone and petrological types are mainly lithic arkose and hybrid sandstone.Gas bearing reservoir lithology is mainly glutinite and petrological type is fragment glutinite.Reservoir micro-accumulation is featured by development of reservoir space types including remaining primary intergranular pores,micropores and microfractures in clay mineral matrix.The pore structure mainly consists of axial canals and fine throats,being medium-high porosity,medium-low permeability reservoir.Study on influential factors on reservoir properties indicates that rock texture,sedimentary microfacies,lithogenesis are main factors affecting reservoir properties in this area;carbonate cement and authigenetic clay mineral lead to poor reservoir properties;corrosion effect of the acidulous water released from conversion process of clay minerals on clastic particles and cement and later injection of hydrocarbon have improvement and storage effects on reservoir primary pores to certain degree.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2006年第6期18-21,共4页
Petroleum Geology & Oilfield Development in Daqing
关键词
冲积扇
细砂岩
碳酸盐
黄铁矿
原生孔隙
烃类注入
alluvial fan
fine sandstone
carbonate
pyrite,primary pores
hydrocarbon injection
