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白碱滩油田六中区克下组为冲积扇沉积,储集层非均质性严重,在对这类储层进行综合评价时,除了用到孔隙度、渗透率和泥质含量等常规评价参数外,在这里增加了变异系数、突进系数和级差三个参数,使得非均质性的作用在储层综合分类评价中得到充分体现;然后应用聚类分析将储集层分为三种类型,其中Ⅰ类储层最好,Ⅱ类储层次之,Ⅲ类相对较差;最后对每个单层中三类储层的分布进行了分析,进而指导油田的进一步开发。
The Lower Cretaceous Karst Formation in the BaiZhongtan Oilfield is characterized by alluvial fan deposition and serious reservoir heterogeneity. In general evaluation of such reservoirs, conventional evaluation such as porosity, permeability and shale content are used In addition to the parameters, the coefficient of variation, the coefficient of abrupt change and the level difference are added here so that the heterogeneity can be fully reflected in the comprehensive classification and evaluation of the reservoir. Then, the cluster analysis is used to classify the reservoirs into three types Among them, the type I reservoirs are the best, the type II reservoirs are second, and the type III ones are relatively poor. Finally, the distribution of the three kinds of reservoirs in each single layer is analyzed, which will guide the further development of the oilfield.