摘要
通过对安塞油田取芯井的岩心观察和大量样品的铸体薄片、扫描电镜分析,对本区长6油层组储层取得以下认识:(1)安塞油田长6油层组储层砂岩以细粒长石砂岩和岩屑质长石砂岩为主,碎屑以长石为主,具有成分成熟度较低,结构成熟度较高的特点;(2)本区与孔隙的形成和演化关系密切的的成岩作用有压实作用、胶结充填作用和溶解作用三种类型;(3)砂岩中发育有粒间溶孔、粒内溶孔、微裂缝、晶间孔等孔隙类型,前两种溶孔构成了本区的有效孔隙。(4)储层物性主要受沉积微相及成岩作用的影响。沉积作用决定了砂岩中碎屑的矿物成分和结构,而成岩作用又可使其矿物成分和孔隙结构发生重大变化。
Through the core observation of core wells and a large number of samples thin sections,scanning electron microscopy analysis of the Chang 6 reservoir,oil Ansai oilfield, the result shows that：（1）The main sandstone of the reservoir sandstone of Chang 6 oil,Ansai Oilfield is fine-grained arkose and lithic feldspathic sandstone,detrital feldspar-based, characteristics of low compositional maturity,high structure maturity.（2）The diagenesis which closely related to formation and evolution of pore,in this field including compaction, filling cementation and dissolution.（3）The sandstone pore type including intergranular dissolution pores,intragranular dissolved pores,micro cracks and intercrystal pore,ect.The frist two types are effective opening of the area.（4）Reservoir physical properties impact on depostion microfacies and diagenesis.Deposition determined the mineral composition and structure of the debris,and diagenesis can make its mineral composition and pore structure produces major change.
出处
《石油化工应用》
CAS
2011年第3期38-42,共5页
Petrochemical Industry Application
关键词
长6油层组
成岩作用
物性
影响因素
Chang 6 reservoir
diagenesis
physical property
influence factors
