为了完善水驱油物理模拟相似理论,本文在前人研究基础上,针对特低渗透油藏的特点,并考虑特低渗透油藏中流体非线性渗流特征的基本方程,应用检验分析法推导出了特低渗透油藏水驱油物理模拟相似准则,分析了各相似准数的物理意义,确定了模型参数与油藏参数进行转换的关系.提出通过选取与实际油藏储层对应的露头岩心,可以实现模型与原型中两相渗流特征、毛管力特征和非线性渗流特征的相似.所得结论为特低渗透油藏水驱油物理模拟提供了理论指导.

In order to improve the water flooding physical simulation similarity theory, on the basis of previous studies, the similarity rules of water flooding in the ultra-low permeability reservoir are deduced with the basic equation considering the nonlinear seepage characteristic of fluid in ultra-low permeability reservoirs. By using the inspectional analysis method, the physical significance of each similar rule is analyzed, and the conversion relationships between the model parameters and reservoir parameters are determined. Through the selection of the corresponding outcrop rock with the actual reservoir, the simulation scheme is able to realize the similarity of two phase flow characteristics, capillary force characteristics, and nonlinear seepage characteristics in between the model and the reservoir prototype. The conclusions are able to provide the theoretical guidance for the physical simulation of water flooding in the ultra-low permeability reservoirs.