Technical Feasibility Studies Of The Microbial Enhanced Oil Recovery In Low Permeability Reservior

With the increasing scale of oil exploration，the number of China’s giant ready oversizeoil fields are shrinking，while at the same time the rapid development of national economy andthe demand for oil is increasing. In order to adapt to the current economic situation，the goal ofChina’s oil industry has gradually shifted to the development and construction of low-yield，low-voltage and low-permeability oil fields. Applying new technologies to improve oilrecovery has currently become an important issue in China’s oil industry.As an important means of tertiary oil recovery，microbial enhanced oil recovery (MEOR)technology has been widely implemented because of its low cost，adaptability，simpleprocess，without injury and environmental problems to the production floor，etc， especiallysuitable for the EOR of conventional waterflood reservoir，and has a wide range ofapplications.In view of the characteristics of the bifurcation oil fields at the Jian valley in Zibei，thispaper compares the domestic and foreign screening criteria for Microbial Enhanced OilRecovery and the conditions of oil reservoirs where the MEOR have been implemented; basedon indoor studies and numerical simulation， this paper also explores the reasonableconcentration，injection volume and injection methods of live MEOR programs，and carriesout the most feasible solution to proceed the analysis and prediction of the microbial waterflooding effect; while carrying out the preliminary test of the MEOR in the bifurcation oilfields at the Jian valley in Zibei，discussing the technological adaptability of the MEOR to thisoil field，and confirming the feasibility of using MEOR to improve the oil recovery at the JianValley in Zibei.