The effects of MEOR include as follows: being favorable to oil-gas percolation, changing wettability of rocks, improving hydrocarbon migration, reducing surface tension of emulsified oil, decreasing crude viscosity and improving sweep efficiency, etc.

• 采油微生物具有自身的优势，有利于油气渗流及提高采收率，尤其是微生物能改变岩石润湿性、改善油气运移、乳化原油降低表面张力，微生物及代谢产物还对原油具有降粘作用，对地层水产生有利影响，提高波及系数。