摘要
利用铸体薄片、扫描电镜、压汞曲线及普通薄片等资料对储层特征进行了研究,发现砂岩类型主要为长石石英砂岩、长石岩屑石英砂岩及长石砂岩,成分成熟度、结构成熟度中等偏高;填隙物主要为泥质、碳酸盐;粘土矿物主要为伊利石及高岭石,偶见蒙脱石。孔隙类型主要为原生粒间孔、粒间溶孔、粒内溶孔、铸模孔、晶间孔等,偶见微裂缝。喉道主要有孔隙缩小型、缩颈型、片状、弯片状喉道等,其中以缩颈喉、片状组合类型为主。各微相砂体中水下分流河道、河口砂坝微相物性较好,前缘席状砂物性次之,浅湖砂坝及远砂坝砂体物性相对较差。综合分析储层总体特征为中孔-细喉-中渗储层。今后的开发、提高采收率及增加产能应针对该类中孔-细喉-中渗储层采取相应的措施。
Thin sections,scanning electron microscopy,mercury intrusion curve and general thin section data and other characteristics of the reservoir were used and it was found out that the main types sandstones included feldspar-quartz,feldspar and feldspathic lithic sandstones,compositional maturity,medium to high maturity structure;there were mainly of mudstones and carbonate fillings;clay minerals were illite and kaolinite,and montmorillonite was occasionally occurred.The main pore types included primary intergranular pores,intergranular dissolvedpores,intragranular dissolved pores,moldic pores,intercrystal pores and occasional micro-cracks.There are narrow pore throat type,contraction type,sheet,curved sheet throat,in which contracted throat,sheet combinations are dominated.Physical properties of microfacies in the distributary channel sand body and mouth bar facies are better,front sheet sand is nest,shallow lake sand bar and distal bar sand are relatively poor.Comprehensive analysis shows that general characteristics of the reservoirs are medium pore-fine throat-the medium permeability ones.For future oilfield development,enhanced oil recovery and increase production capacity,appropriate measures should be taken in medium pore-fine throat-medium permeability reservoirs.
出处
《石油天然气学报》
CAS
CSCD
北大核心
2011年第9期47-51,166,共5页
Journal of Oil and Gas Technology
基金
国家自然科学基金项目(40872099)
关键词
濮城油田
沙一段
孔隙结构
储层物性
Pucheng Oilfield
Es1
pore structure
reservoir physical property
