利用测井交会图法定量表征致密油储层成岩相——以鄂尔多斯盆地华池地区长7致密油储层为例  

Quantitative Characterization of Diagenetic Facies of Tight Sandstone Oil Reservoir by Using Logging Crossplot: A case study on Chang 7 tight sandstone oil reservoir in Huachi area,Ordos Basin

作　　者：冉冶[1] 王贵文[1,2] 赖锦[1] 周正龙[1] 崔玉峰[1] 代全齐 陈晶[1] 王抒忱 

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]中国石油大学(北京)非常规天然气研究院,北京102249

出　　处：《沉积学报》2016年第4期694-706,共13页Acta Sedimentologica Sinica

基　　金：国家科技重大专项(2011ZX05020-008);国家自然科学基金(41472115)~~

摘　　要：根据岩芯观察并综合利用普通薄片、铸体薄片、阴极发光、扫描电镜等资料结合物性分析,对鄂尔多斯盆地华池地区长7致密油储层成岩作用、成岩矿物等进行了研究。根据储层成岩作用类型及强度、成岩矿物组合特征等,将研究区成岩相定性划分为不稳定组分溶蚀相、黏土矿物充填相、碳酸盐胶结相以及压实致密相四类。通过常规测井中对成岩相具有较高灵敏的伽马、密度、声波时差、补偿中子孔隙度、电阻率的测井曲线分析,利用密度—伽马交会图法进一步对四类成岩相进行定量划分,并建立研究区成岩相的测井定量识别标准。以华池地区城96井为例,其单井纵向的成岩相测井定量识别划分结果与取样点薄片鉴定结果、试油结论和物性分析等均具有良好的对应,验证了模型的可靠性。成岩相测井定量表征方法的研究,为后期致密油储层综合评价以及有利发育区带预测提供了理论指导和技术支持。Huachi area is located in the southwest of Shanbei slope of Ordos Basin in China,with a flat strata and simple structure. Yanchang Formation of the Upper Triassic is terrigenous clastic rock series of fluvial facies and lacustrine facies,formed in the process of continuous depression and stable settlement in Ordos Basin,and vertically divided into 10 oil layers. During the deposition of Chang 7 member,the basin was in the maximum lake flooding period,developing sandy debris flow and turbidite fans in the center and on the slope. Having experienced long diagenetic evolution,Chang 7 member formed current reservoir characteristics. Diagenetic facies is the material reflection of diagenetic environment,and the combination of diagenesis and diagenetic minerals,and it is also the production of diagenesis and evolution stages in specific sedimentary,physical and chemical environment. Diagenetic facies includes the characteristics of rock particles,cement,fabric and cracks-holes,which highly generalizes diagenesis,diagenetic minerals,diagenetic environment,diagenetic events,and diagenetic evolutionary sequence during the period between the formation of sediment and the occurrence of metamorphism. The research on cores of diagenetic facies are diagenesis and diagenetic minerals. What＇s more,diagenetic facies plays an important role in the formation of effective reservoir,therefore to study diagenetic facies of tight sandstone oil reservoir has a broad application prospects. In this paper,diagenesis and diagenetic minerals of Chang 7 tight sandstone oil reservoir in Huachi area of Ordos Basin are studied by using core observation,thin section examination,scanning election microscope data,cathode luminescence and physical property analysis. According to the types and intensity of diagenesis and the combination feature of diagenetic minerals,diagenetic facies in the study area is qualitatively divided into four types,including instable components dissolution facies,clay minerals filling facies,and carbonate cementation fac

关 键 词：成岩相 测井交会图 长7油层组 致密油储层 华池地区 

分 类 号：P618.13[天文地球—矿床学]