Study On The Migration Rule Of Microorganism In Porous Medium

Since its Beckmann suggests that microbes could be used for enhanced oil recovery, after nearly a century of practice and study microbial enhanced oil recovery technology will continue to improve, gradually entered the scientific field in oil. MEOR has the following advantages: oil displacement mechanism of unique, simple operation process, the characteristics of no harm to the formation and environment, as well as the selection of microbes and nutrient solution is determined by the formation environment, so caused the attention of microbial technology in the world, and in-situ practice widely, and achieved very significant to improve oil recovery effect. Especially, for benefit less well, has a very significant role in extend the economic life of the well. Although in practice and theory research of microbial enhanced oil recovery technology achieved excellent results, there is still a lack of biological characteristics of microorganisms. Therefore, in the later practice and theoretical study, we should constantly improve the technology; strive for maximum microbial enhanced oil recovery technology to play role in enhanced oil recovery.Firstly, in this paper, screening of excellent strains; and then, the thermal stability, pH value of adaptability, resistance to salt performance and other aspects for two kinds of screened bacteria to evaluate, screening of excellent surfactant producing bacteria-bnsp-3. To analyze the migration of target strains in porous media, to explore the influence of permeability, pore radius, roar radius and pore throat ratio for the microbial fluid flow in porous media. To study microbial bacilli in the core distribution, suitable for microbial bacilli in the core distribution of the theoretical equation by microbial bacilli in long core models of migration in a way that to prove accuracy one dimensional convection transfer formulas.