塔河缝洞型油藏溶洞相多点统计学建模方法

塔河油田奥陶系缝洞型碳酸盐岩储集空间多样，非均质性极强，其储集体发育并非受控于沉积相，而是受控于构造岩溶作用，因此常规储层建模思路和方法很难适用。在缝洞单元研究的基础上提出了岩溶相的概念，进行了单井岩溶相划分，通过训练图像建立了溶洞相模式，采用多点统计学方法模拟了溶洞相分布，以岩相分布模型作为约束，利用序贯算法实现了溶洞相孔隙定量建模，为此类油藏的储层建模和剩余油研究提供了有效手段。

Multi-point Geostatistical Approach to Model Karst Facies of Fracture-cavity Reservoir in Tahe Oilfield

The Ordovician fractured-vuggy Carbonate reservoirs in Tahe Oilfield are typically complicated ones with varioustypes of reservoir spaces and very strong heterogeneity. Studies reveal that the distribution of the reservoir spaces have strongrelation to the sedimentary condition but is determined by the tectonic karstification. Therefore the convention model method，such as two point statistical methods，cannot provide accurate three-dimensional geology models. In this paper，one new conceptof karst phase is defined according to the characters of the the fractured-vuggy units. After the karst phases of the single wellsas wells as the training image model are studied，the 3D karst phase modes are established by using multi-point geostatisticalmethods to simulate the karst phase distribution. Finally，taking the distribution as a constraining data，we create a reasonablethree-dimensional geology models with sequential algorithm.