The combined technology of biological oxidation and biological competition was developed and used to treat oil field produced water to increase viscosity of polymer solution. The running results show that the technology can remove all of the reducible substances, such as hydrogen sulfide etc. The viscosity of the polymer solution prepared with the treated produced water can be maintained＇ above 20 mPa-s and keep stable,which meets the needs of production.%采用生物氧化去除还原性物质和生物竞争抑制硫酸还原菌的集成技术处理油田采油污水用于配制聚合物溶液。运行结果表明：采用处理后的采出水配制聚合物溶液，黏度达20mPa·s以上，且长时间保持稳定，能够满足现场生产需求。
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