摘要
综合应用物性及孔隙结构分析数据,并结合沉积岩普通薄片、铸体薄片以及X-射线衍射等资料,对歧口凹陷滨海地区沙河街组深层储层特征及影响因素进行了分析,结果表明:深层碎屑岩储层属于中低孔—(特)低渗型,沙一段储层物性好于沙三段,孔隙度在纵向上的演化具有明显的分带性,具有多个次生孔隙发育带;沉积相带、成岩作用和超压作用是影响深部储层物性的3大主要因素,而建设性的溶解作用是次生孔隙发育的关键因素;裂缝的发育对深部储层的改造也具有重要的作用。
In this paper we discuss the characteristic and formation of deep clastic reservoir in the Binhai area of Qikou sag by means of integration of data of physical property and pore structure, thin section, epoxy resin-impregnated thin sections, SEM and X ray. The result shows that the deep clastic reservoir is low- middle porosity and micro low permeability, and the reservoir quality of Es1 is better than that of Es3. Meanwhile, there is a vertical zonal distribution of porosity for deep clastic reservoir, with secondary pore zone. The physical property of deep clastic reservoir is constrained by sedimentary facies, diagenesis and abnormal pressure function, and the constructive dissolution is a main factor of controlling the secondary pore. Additionally, the occurrence of fractures does the reservoir reconstruction.
出处
《天然气地球科学》
EI
CAS
CSCD
北大核心
2010年第4期566-571,共6页
Natural Gas Geoscience
基金
中国石油股份公司科技管理部"歧口富油凹陷大油气田勘探及综合配套技术研究"项目(编号:2008-030603)资助
关键词
深层
碎屑岩
储层
物性
成岩作用
歧口凹陷
Deep layers
Clastic rock
Reservoir
Property
Diagenesis
Qikou sag.
