摘要
针对H油田沙二段储层内部非均质严重、剩余油分布不均等问题,本文对其水下分流河道储层中隔夹层进行了层次结构特征研究。将本区隔夹层划分为砂层组间隔层、小层间隔层、水下分流河道之间夹层及单一水下分流河道内部夹层4类,利用岩心资料、测井资料和测试资料,划分了隔夹层物性和电性标准,结合该区沉积微相、高分辨率层序地层学的研究,进行了隔夹层展布分析。结果表明,隔夹层分布与水下分流河道不同部位关系密切,隔层厚度从水下分流河道边缘到中心依次减薄,而夹层在水下分流河道分叉口部位和河道边缘部位发育程度较高,水下分流河道中心主流线部位夹层发育程度较低,进而影响了研究区的剩余油分布情况。
The hierarchical structures of the intercalations in braided river delta front underwater distributary are studied in view of the problems such as strong heterogeneity and uneven distribution of remaining oil in the reservoirs of the Es2 of H Oilfield. The intercalations are divided into four types （intercalation of sand group, intercalation of sublayer, intercalation between the underwater distributary channels and intercalation in single underwater distributary channel）. The standards of the petrophysical property and electrical property of the intercalation are classified based on core analysis, logging information and testing data. The distribution of the intercalation of the underwater distributary channel is described by sedimentary microfacies and high-resolution sequence stratigraphy analysis. The result shows that the distributions of the intercalation are closely associated with the different parts of the underwater distributary channel, the thickness of the intercalation thinning from the edge to the center of the underwater distributary channel, however, the level of the intercalation development in the crotches and edge of the underwater distributary channel is higher than that in the central main stream line of the underwater distributary channel, which affect the distribution of remaining oil in the study area.
出处
《油气地球物理》
2013年第1期54-56,共3页
Petroleum Geophysics
关键词
水下分流河道
层次结构
隔夹层
沉积微相
underwater distributary channel, hierarchical structure, intercalation and sedimentary mierofacies
