非均质河道砂体多级相控建模方法探讨

Multiple Facies-controlled Modeling for Anisotropic Channel Sands

采用多学科信息集成约束的储层建模思路,提出了针对南堡油田非均质河道砂体的多级相控建模方法。通过密井网区的解剖,建立了研究区储层地质知识库,用确定性信息限定随机模拟过程,建立河道砂体骨架模型;在河道砂体骨架模型的严格约束下,分析基准面旋回控制下的河道砂体构成、砂体叠置规律、岩相相序及相比例等河道内部非均质特征,用相控建模思路建立河道砂体岩相模型;最后用变差函数将上述各类信息有机综合在一起,用岩相模型约束,建立高精度的储层参数模型。

Multidisciplinary information was used to integrate the idea of reservoir modeling,the multi-stage facies-controlled methods was proposed for modeling the anisotropic channel sand bodies in combination with Nanpu Oilfield.A reservoir geologic knowledge base was firstly built for the studied area by dissecting the sands of dense well pattern and the framework model of channel sands was established by using determinacy message to restrict the probabilistic simulation;also the relationships among the structure,the overlying pattern,the retention grade,phase sequence,and facies proportion of the channel sand bodies were analyzed in the process of the base level cycle.Under the constraint of the framework of sand body,the lithofacies distributing model was established.And the information stated above is integrated with variable function,finally the attribute model is obtained based on the restraint of lithofacies model.