The Research Of Micro Parameters Of The Pore Effect On Oil Displacement Based On Network Model

In order to explore the complex block from the microscopic laws of oil field water seepage, high water cut stage of exploration in the core changes in the micro pore structure on displacement efficiency, the main reservoir for the Jidong Oilfield real core two blocks of three different watery stage.first of all, Using CT imaging technology, through the different stages of the core sections of water CT scan, get the corresponding digital core analysis porosity, shape factor, the coordination number of stages with different water content changes ; Secondly, through the simulation results with corresponding core physical simulation experiment contrast, shows that the digital core the validity and reliability, and on this basis to construct the pore network model.Through 3d reconstruction, constructs the accord with real topology structure, the pore network model for three-dimensional network model parameters are configuration, can simulate the real reservoir petrophysical, and the use of the pore network model to simulate the process of water flooding, analyze water displacement effect and residual oil distribution.In summary, moisture in the rock pores increase in the proportion of cases, the residual oil after water flooding percentage decreased; in the case of wetting the same, with the pore radius increases, increase in water flooding oil recovery, the remaining Oil percentage decreased; the greater coordination number of pores of the rock, indicating that the better the connectivity of pores, the more fluid flow channels, can reduce the probability of the formation of the remaining oil, recovery higher percentage of residual oil Lower levels; the average pore shape factor larger more regular pore shape, corner less fluid flow more smoothly, resulting in improved displacement efficiency and reduce the percentage content of residual oil; moisture reservoir recovery Significantly higher than oil wet reservoir recovery. Network model for further description of microscopic pores to lay a theoretical foundation for research in high water cut oil changes of pore structure on displacement efficiency of guiding significance and application value.