Application of Molecular Simulation Technology in Improving Oil Recovery

Abstract

Abstract With the continuous development of oil exploitation, the research on the oil industry has gradually shifted from macro to micro. Molecular simulation technology has attracted wide attention due to its advantages of saving costs, shortening the experimental period, and realizing the limit simulation conditions that are almost impossible under physical experimental conditions. Petroleum workers use molecular model to study the effects of different properties on adsorption and desorption. The results show that the adsorption capacity of CH4 increases with the increase of pore size and pressure, and decreases with the increase of temperature and water content. The interaction between clay minerals and CO2 was discussed, and various reactions formed after CO2 was inserted into clay minerals were discussed. Exploring the adsorption and aggregation behavior of surfactants on the interface and analyzing the influence of various properties of surfactants on oil displacement effect are helpful to optimize surfactants and improve oil displacement efficiency. Scientific research on microscopic seepage of polymer flooding has been carried out, and a large number of studies have been carried out on light hydrocarbon diffusion, polymer viscoelasticity and diffusion properties of small molecules in pores, which makes the evaluation of oil displacement effect more accurate. The application of molecular simulation technology in the above studies has obtained the properties that cannot be extracted from many macro experiments, which provides an effective method for the study of theoretical mechanism and better guides the actual production.