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. 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。
Results show that main microbial populations in the reservoir are saprophytic bacteria, hydrocarbon-oxidizing bacteria and ferment bacteria. 结果表明,腐生菌、烃类氧化菌、发酵菌等是油藏中存在的主要微生物群落;
The specific methods: 1.to ascertain five control indications including suspended solid content, grain diameter median, oil content, iron bacteria and saprophytic bacteria by carrying out the experiment of core flow; 具体的做法是:采用岩心流动试验确定悬浮固体含量、颗粒直径中值、含油量、铁细菌和腐生菌五项控制指标;