Method for evaluating influence of carbon dioxide flooding asphaltene precipitation on recovery ratio

The invention belongs to the technical field of oil and gas field development, and provides a method for evaluating the influence of carbon dioxide flooding asphaltene precipitation on the recovery ratio. The method fully combines oil reservoir geological research results, and analyzes the influence of carbon dioxide flooding asphaltene precipitation on the final recovery ratio through theoreticalanalysis and experimental research by adopting numerical simulation calculation. According to the method, on the basis of an experiment of asphaltene precipitation caused by CO2 flooding, a one-dimensional numerical model is established by using numerical simulation software, and a rock core CO2 flooding experiment is simulated. An asphalt reaction model is utilized, and the influence of asphaltene deposition on a rock core in the CO2 flooding process is considered. Parameters are continuously adjusted in the numerical model and corrected by using a physical simulation experiment result, an asphaltene precipitation o