Development and Application of Numerical Simulation Technology in Chemical Flooding

Chemical flooding is a key technology for enhanced oil recovery, its flooding mechanism involves multiphase seepage, interfacial chemistry and complex chemical reactions, which are highly nonlinear and multi-scale. The application of numerical simulation technology in chemical flooding has become an important means for enhanced oil recovery, which can quantitatively characterize the physical and chemical phenomena in the process of oil flooding, and provide theoretical basis for the study of oil flooding mechanism, program optimization and effect prediction. In order to clarify the research status and development trend of numerical simulation technology in chemical flooding, the article systematically reviewed the technical development and application progress in this field in recent years. The article first introduces the basic principle of chemical flooding, the displacement mechanism of common chemical flooding systems (such as polymer flooding, surfactant flooding, alkali flooding and composite flooding) and the technical bottlenecks faced. By combing the relevant literature at home and abroad and field tests, the commonly used numerical simulation methods are analyzed, the applicable conditions and accuracy differences of different simulation methods are compared, and the application of numerical simulation methods to various mathematical models in chemical flooding (such as multiphase flow model, chemical reaction kinetics model) are analyzed. The application examples of numerical simulation technology in optimizing flooding scheme and predicting flooding effect in different flooding systems are also summarized. Finally, the challenges of current numerical simulation technology are discussed, and the future research directions are put forward, in order to provide important technical support for the numerical intelligence development and field application of chemical flooding, and provide scientific basis for promoting the efficient development of oil fields.