层间非均质大型平面模型水驱波及系数室内实验研究

为认清层间非均质性油藏注水开发动态波及过程，依据中原油田的非均质特征，制作了层间非均质大型平面物理模型。通过室内三维物理模拟驱油实验，量化研究了正韵律高含水油藏地质模型不同注入体积及不同驱替压差下含油饱和度与波及系数的变化特征。结果表明，层间非均质模型三层的动用程度存在明显的差异；动用程度与储层渗透率正相关。当注入体积从0.10 HCPV提高到1.15 HCPV时，高渗层波及效率从36.73%变化到100%，中渗层从24.49%增大到76.60%，而低渗层仅从14.24%变化到44.90%。驱替压差提高时，对低渗层的采出程度提高幅度远大于高渗层。通过后期分层调整措施，可以提高中、低渗层的采出程度，层间调整是层间非均质油藏改善开发效果的有效措施。 

Laboratory experimental research on waterflooding sweep efficiency of large-scale and two-dimensional inter-layer heterogeneous physical model

In order to recognize the dynamic sweep process of heterogeneous reservoir in water injection development, a large-scale, two-dimensional heterogeneous physical model was made for the first time on the basis of Zhongyuan Oil Field. Through the three-dimensional physical simulation experiment in laboratory, the quantitative research on the variation characteristics of oil saturation and sweep efficiency of the geological model of positive rhythm and high water-cut reservoir under different injection volume and displacement pressure was made. The results showed that there were obvious differences among the three layers’ producing degree of the heterogeneity model and there was a positive correlation between producing degree and reservoir permeability. When the injection volume was raised from 0.10 HCPV to 1.15 HCPV, the sweep efficiency increased from 36.73% to 100% in high permeability layer, from 24.49% to 76.60% in middle permeability layer, and from 14.24% to 44.90% in low permeability layer. When the displacement pressure difference was raised, the recovery percentage of low permeability layer was significantly higher than that of high permeability. Through hierarchical ordering measures, the recovery percentage of middle permeability layer and low permeability layer can be increased, and the interlayer adjustment is an effective measure for improving the development result of heterogeneous reservoir.