Numerical Simulation Of Microbial Enhanced Oil Recovery Research

As an important technique, microbial enhanced oil recovery (MEOR) has wined more and more attention and application in tertiary oil recovery for its superiority. Some questions in MEOR are discussed in this dissertation. Considering microbial functions of profile control and viscosity reduction, a three-dimensional, two-phase and four-component mathematical model is presented to describe porous flow in MEOR process. Numerical solution to the model is performed using IMPESIMC(implicit pressure, explicit saturation, implicit concentration). According to the study of lab experiments, the relation curves between microbial concentration and oil viscosity is matched. The software has been established.Lab experiments of microbial flooding are studied. Viscosity reduction, oil-water interfacial tension reduction, and the pH variety of nutrient about two kinds of microbe are studied. The study about temperature tolerant, barotolerant, salt tolerant of the microbe are performed. By core flooding experiment using compounded microbes, the result of vary injection impact on oil recovery is obtained.The model of microbial profile control is established. Both mechanism and its influencing factors are investigated while a series numerical calculation is implemented by using the model established.Based on experiment data, the relationship between microbial concentration and oil viscosity is matched. Themodel of microbial viscosity reduction is established and the sensitivity analysis about parameters is carried.A field calculation example, numerical simulation of the block of J22 in Hua-Bei oil field, has been presented by taking advantage of continent software for MEOR simulation. Based on the history match of water flooding, evaluation and optimum of MEOR projects are donated together with results from the research of mechanism.