Comparative Analysis of Remaining Oil Characteristics in Water Flooding and ASP Flooding Based on Micro-CT Scanning Displacement Experiments
摘要
In this paper, a combination test of microscopic multiphase flow displacement and micro-CT scanning equipment was conducted to study the distribution characteristics of remaining under different development modes. The internal pore structure and fluid distribution was observed, the filling characteristics of oil at different statge were studied, the residual oil occurrence status was obtained and quantitatively characterized by micro CT scanning at displacement stage by water flooding or ASP flooding. The results show that the oil displacement efficiency of water flooding is 56.75%, and that of ASP flooding is 63.49%. The remaining oil of water flooding is mainly clustered type, and the remaining oil of ASP flooding is mainly porous type. The study provides a basis to study the distribution of remaining oil and the potential exploitation in the future.