黄骅坳陷官195断块孔一段扇三角洲沉积及储集层特征  

Sedimentary and Reservoir Characteristics Analysis of the First Member of Kongdian Formation in Faulted Block Guan 195,Huanghua Depression

作　　者：李春晓[1,2] 侯加根[1,2] 李永强[1,2] 王庆魁[3] 季岭 孙建[3] 

机构地区：[1]中国石油大学(北京)地球科学学院,北京102249 [2]中国石油大学(北京)油气资源与探测国家重点实验室,北京102249 [3]中石油大港油田公司采油三厂地质研究所,河北沧州061723

出　　处：《延安大学学报（自然科学版）》2017年第4期5-11,共7页Journal of Yan'an University：Natural Science Edition

基　　金：国家基金项目重大专项"断陷湖盆三角洲单砂体构型表征技术"(2016ZX05010001-004)

摘　　要：综合利用岩心分析、岩石薄片、铸体薄片、扫描电镜、X衍射及物性测试等分析化验资料,对黄骅坳陷南部官195断块孔一段下部枣Ⅳ、枣Ⅴ油组沉积及储层特征进行系统研究,并分析了影响储层质量的主要因素。研究表明:研究区孔一段枣Ⅳ、枣Ⅴ油组为扇三角洲沉积,可识别出水下分支河道、水下分支河道间、席状砂和河口坝等4种扇三角洲前缘微相,以及辫状水道、水道侧翼和漫滩沼泽3种扇三角洲平原微相。孔一段下部枣Ⅳ、枣Ⅴ油组岩性为中砂岩、细砂岩和中-细砂岩,岩石类型以长石砂岩和岩屑质长石砂岩为主,杂基含量少,颗粒支撑;储层平均孔隙度为25.9%,平均渗透率为252.9×10^(-3)μm^2,为中孔、中高渗储层;储集空间以原生粒间孔隙为主。沉积相带和成岩作用是影响储层质量的主要控制因素:沉积方面,岩屑和胶结物的含量、粒径以及颗粒分选性影响储层的渗流性能,沉积微相对储层孔隙度影响不大,但是对渗透率影响明显,辫状水道、水下分支河道以及河口坝控制高渗储层的分布;成岩方面,机械压实作用和胶结作用使原生粒间孔隙减小,降低储层质量。The sedimentary and reservoir characteristics of Zao-Ⅳ and Zao-Ⅴ oil reservoirs in the lower part of the first member of kongdian formation of faulted block Guan 195,southern Huanghua depression,are comprehensively analyzed by using core analysis,thin rock slice,cast thin slice,scanning electron microscope,X-ray diffraction and physical property test system research.The main factors influencing reservoir quality are analyzed.The study shows that the Zao-Ⅳ and Zao-Ⅴ oil formations in the first member of kongdian formation of the study area are fan delta sediments,which can identify four fan delta front microfacies,such as underwater branch channel,underwater branch channel,silt sand and estuary dam,and three kinds of fan delta plain microfacies of braided channel,waterway flank and floodplain.The lithology of Zao-Ⅳ and Zao-Ⅴ oil groups in the lower member of the first member of kongdian formation is medium-sandstone,fine-sandstone and medium-fine sandstone.The types of rocks are mainly feldspar sandstone and feldspathic-feldspar sandstone with less miscellaneous content and particle support.The average porosity of the reservoir is 25.9% and the average permeability is 252.9 × 10^(-3)μm^2,which is a medium-porosity and medium-high permeability reservoir.The reservoir space mainly consists of primary intergranular pores.Sedimentary facies belt and diagenesis are the main controlling factors affecting reservoir quality: in terms of sedimentation,the content of cuttings and cements,particle size and particle sorting affect the reservoir seepage performance.Sedimentary microfacies have little effect on reservoir porosity,but have obvious influence on permeability.Braided channel,underwater branch channel and estuarine dam control high permeability reservoir.In diagenesis,mechanical compaction and cementation reduce the intergranular pores and reduce the reservoir quality.

关 键 词：黄骅坳陷 官195断块 孔一段 扇三角洲 储集层特征 

分 类 号：TE122.1[石油与天然气工程—油气勘探]