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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
Author(s): 
Pages: 694-706
Year: Issue:  4
Journal: Acta Sedimentologica Sinica

Keyword:  diagenetic facieslogging crossplotChang 7 oil layertight sandstone oil reservoirHuachi area;
Abstract: 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.
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