Abstract: Distribution of sand body in CⅢ Formation Tazhong 40 well block is complicated and reservoir heterogeneity is strong. Taking deterministic modeling and stochastic modeling method into consideration, the structural model, sedimentary microfacies model and attribute model controlled by microfacies of CⅢ Formation Tazhong 40 well block were established by Petrel software in which the sedimentary microfacies model was established under four restrained mechanisms, then the recalculation of the geological reserves was also completed on the basis of the models. Research shows that the microfacies which can store the oil was dominated by highenergy foreshore sandsheet, the porosity and permeability of the third layer were better than that of the first and second layer in research area obviously. What's more, the value of geological reserves calculated by threedimensional geological model was objective and reasonable, which layed the foundation for further development and adjustment of CⅢ Formation Tazhong 40 well block. In general, it owned reference significance for the application of faciescontrolled modeling insimilar area.

Key words: Sedimentary microfacies model, Four restrained mechanisms, Attribute model, Recalculation of the geological reserves, Tazhong 40 well block

摘要： 针对塔中40井区CⅢ油层砂体展布复杂,储层非均质性强的特点,运用Petrel建模软件,采用确定性建模与随机建模结合的方法,建立了研究区块的构造模型、沉积微相模型、属性模型,其中沉积微相模型的建立采用了四种约束机制,并利用上述模型对地质储量进行复算。结果表明,塔中40井区CⅢ油层的主力储油微相为高能前滨沙坪微相,研究区第3小层的孔隙度、渗透率等物性参数明显优于1、2小层。以三维地质模型为基础计算所得的储量值客观合理,为油田的后续开发调整奠定了基础,研究成果对类似地区的相控建模研究具有很好的借鉴意义。

关键词: 沉积微相模型, 四种约束机制, 属性模型, 储量复算, 塔中40井区