摘要
根据已钻井成果,结合岩石薄片、铸体薄片、扫描电镜、阴极发光等化验分析资料,以储层微观特征及孔隙结构分析为手段,对庙西南凸起沙河街组低渗透砂岩储层特征进行了描述,从沉积环境和成岩作用两方面对影响低渗砂岩储层因素进行了分析。结果表明:庙西南凸起沙河街组储层岩石类型以长石岩屑砂岩、岩屑长石砂岩为主。已钻井处于扇三角洲沉积体系边缘相带,沉积物粒度细、分选差是形成低渗透储层的基础,碳酸盐岩多期次胶结作用是影响储层物性的主要因素,而溶蚀作用和构造应力作用对低渗透储层的改善作用有限。
According to the drilling results,combination of rock slice,casting thin-section,scanning electron microscope,and so on,analysis datas,by means of microcosmic reservoir characteristics and pore structure analysis,describe the low permeability sandstone reservoir characteristics of Shahejie Formation in the south uplift of Miaoxi.This paper analyses the effects of low permeability reservoir factors from sedimentary environments and rock action two respects.The results show that reservoir rock types of shahejie group in the south uplift of Miaoxi is mainly lithic sandstone feldspar and lithic feldspar sandstone.Drilling is in the sedimentary system marginal facies.Small sediment particle size,poor sorting,high shale content are the foundation of forming the low permeability reservoir.Multiple stage cementation of carbonate rock is the main influence factor of reservoir while the denudation and tectonic stress in reservoir improvement action are limited.
出处
《地质科技情报》
CAS
CSCD
北大核心
2013年第2期58-61,共4页
Geological Science and Technology Information
基金
"十二五"国家科技重大专项"近海大中型油气田形成条件与分布"(2011ZX05023-006)
关键词
渤海海域
庙西南凸起
低渗储层
控制因素
the south uplift of Miaoxi
low porosity and low permeability
reservoir characteristics
controlling factor
