This paper introduces three kinds of bacteria which are the most hazardous for oilfield water injection, namely sulfate reducing bacteria, iron bacteria and saprophytic bacteria.

• 摘要油田注入水中硫酸盐还原菌、铁细菌、腐生菌是危害最大的细菌，这三种细菌特性各异，相互之间还存在一定的联系。