砂体融合的定量表征及其对储集层连通性的控制

发布时间：2018-07-27 16:26

【摘要】：以浊积朵叶体沉积为例,介绍了砂体融合现象的类型与形成原因,讨论了砂体融合现象对沉积环境及砂体叠置样式的指示作用,并应用砂体融合比定量描述了砂体之间相互融合的程度。在以砂泥为主的碎屑沉积中,砂体之间的相互融合非常普遍,其包括砂体对泥质隔夹层的侵蚀并与其他砂体融合两个方面。对已有文献的统计分析表明,砂体融合比在不同的构型层次有显著差异,在此基础上,用基于目标的建模方法建立了3组砂地比、单砂层尺寸相同但具有不同层次与不同砂体融合比的朵叶体三维模型。对模型的连通性分析表明:模型引入的沉积层次越多,连通性越差;对沉积层次一致的模型而言,砂体融合比越高,连通性越好。
[Abstract]:Taking turbidite flower leaf body deposition as an example, the types and forming reasons of sand body fusion phenomenon are introduced, and the indicative effect of sand body fusion phenomenon on sedimentary environment and sand body superposition style is discussed. The degree of sand body fusion is quantitatively described by using sand body fusion ratio. In the detrital sediments dominated by sand and mud, the mutual fusion between sand bodies is very common, which includes erosion of muddy intercalation and integration with other sand bodies. The statistical analysis of the previous literatures shows that the sand body fusion ratio is significantly different at different configuration levels. On this basis, three groups of sand / land ratios are established by using the method of object-based modeling. A 3D model of a single sand bed with the same size but different fusion ratios of different layers and different sand bodies. The connectivity analysis of the model shows that the more sedimentary layers are introduced into the model, the worse the connectivity is, and the higher the sand fusion ratio is, the better the connectivity is for the model with consistent sedimentary levels.
【作者单位】：北京大学地球与空间科学学院;中国地质大学(北京)能源学院;中国地质调查局油气资源调查中心;
【基金】：中国博士后科学基金(2016M591016)
【分类号】：P618.13

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