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老油田开采中控制油井出水是一项主要支出。油层非均质性及渗透率变化会加剧出水，使采油效率大为降低。本文给出用能够产生聚合物的细菌进行试验的结果，这些细菌被分离并在不同温度及矿化度下进行了测试。岩芯驱试验表明微生物处理是有效的，由于就地生成了聚合物，使得有效渗透率减少了90％。非介入式成象技术。如磁共振成象（MRI）和计算机辅助层析成象（CT）、技术被用来观察多孔介质中的流体分布。高渗区被生成的生物聚合物封堵，结果盐水转向了渗透率较低的区域。
Control of oil well water outflows in old fields is a major expense. Reservoir heterogeneity and permeability changes will exacerbate the water, so that oil production efficiency is greatly reduced. This article presents the results of tests carried out on bacteria that produce polymers that have been isolated and tested at different temperatures and degrees of salinity. Core-drive tests showed that microbial treatment was effective, resulting in a 90% reduction in effective permeability due to in-situ polymer formation. Non-invasive imaging technology. Techniques such as magnetic resonance imaging (MRI) and computed tomography (CT) are used to observe fluid distribution in porous media. The hypertonic zone is plugged with the resulting biopolymer, with the result that the brine is diverted to areas of lower permeability.