微生物提高石油采收率 (MEOR)技术 ,是一项具有良好发展前景的三次采油技术。就MEOR增油机理、影响因素、现场注入方案、现场监测方案、现场试验取样分析及试验效果分析 ,进行了较详细的论述。在关井期间CO2 含量上升 ,开井生产后产出水中有机质含量增加、pH值下降、细菌浓度及种类增加。 2 9口试验井中有 2 0口见到试验效果 ,见效率达 69% ,试验效果较好。 Microbial enhanced oil recovery (MEOR) technology, is a good prospect for the tertiary recovery technology. The MEOR oil-enhancing mechanism, influencing factors, on-site injection scheme, on-site monitoring program, field test sampling analysis and test effect analysis were discussed in more detail. During the shut-in period, the CO2 content increased. After open-pit production, the organic matter content in the produced water increased, the pH decreased, and the bacterial concentration and species increased. Twenty-two of the 9 test wells saw the test effect, and the efficiency was 69%. The test effect was good.