华庆油田长81储层成岩相类型及微观孔隙结构特征  

Types of Sandstone Reservoir Diagenetic Facies and Microscopic Pore Structure Characteristics of Chang 8_1 Reservoir in Huaqing Oilfield

作　　者：任大忠[1] 孙卫[1] 魏虎 周树勋[3] 张一果[1] 张茜[1] 

机构地区：[1]大陆动力学国家重点实验室、西北大学 地质学系,陕西 西安 710069 [2]陕西延长石油 集团 有限责任公司 研究院,陕西 西安710075 [3]低渗透油气田勘探开发国家工程实验室,陕西 西安710018

出　　处：《现代地质》2014年第2期379-387,共9页Geoscience

基　　金：国家科技重大专项大型油气田及煤层气开发(2011ZX05044);陕西省科技统筹创新工程(2011KTZB01-04-01)

摘　　要：为探讨华庆油田长81储层成岩相类型及相内微观孔隙结构特征,在储层沉积特征背景上,开展物性、铸体薄片、扫描电镜、常规压汞、图像孔隙、X线衍射、油水相渗等测试实验,并结合试油及试采数据资料验证。研究表明,不同成岩相类型具有建设性与破坏性双重作用,具体表现在压实作用、胶结作用、溶蚀作用的差异上。室内实验对成岩相与微观孔隙结构的定性分析与定量描述具有一致性以及与试油、试采数据吻合性,指出依据微观孔隙结构特征能够预测并评价该类储层有利空间。长81储层水下分流河道沉积微相中绿泥石衬边残余孔溶蚀相粒间孔发育,为优势储集带;强压实-碳酸盐+伊利石胶结相孔隙被破坏,损失严重,储集性较差。In order to characterize the diagenetic facies and microscopic pore structure characteristics of low/ul-tra-low permeability sandstone reservoir in Chang 8 1 segments of Huaqing Oilfield,this paper discusses the dia-genetic process,cement type of each diagenetic facies,pore evolution,the effect of pore structure on the physi-cal property and fluid seepage characteristics.On the background of reservoir sedimentary characteristics,the test analysis methods are used and the testing oil exploration results for dynamic data validation is made,such as,physical property,casting lamella,scanning electron microscope （SEM）,conventional pressure mercury, image pore,X-ray diffraction,oil-water relative permeability.Establishing the reservoir evolution frame in time and space：deposition （sedimentary facies）-diagenesis （diagenetic facies）-pore evolution are the controls of microscopic pore structure of reservoir physical property and seepage characteristics.Different diagenetic facies type have both constructive and destructive dual effects,specificing in the degrees of differences of compaction, cementation,function,dissolution.The qualitative analysis and quantitative description of indoor experiment of diagenetic facies microscopic pore structure have a consistency with testing for oil exploration results and experi-mental data.It is pointed out that the diagenetic facies and microscopic pore structure characteristics of this kind of reservoir can predict and evaluate favorable space.Chang 81 reservoir underwater distributary channel micro-facies with chlorite lining edge residual pore-dissolution phase combination of intergranular pore development is the most favorable reservoir belt.Pore of forced compaction-carbonate ＋illite cementation facies association is damaged too seriously to be an invalid reservoir zone.

关 键 词：华庆油田 成岩相 微观孔隙结构 优势储集带 

分 类 号：TE122.2[石油与天然气工程—油气勘探]