HH油田C8储层污水回注水质标准研究

Research on the Water Quality Standard of Produced Water Reinjection in C8 Reservoir of HH Oilfield

目前国内对低孔特低渗储层注水开发中注入水水质标准的研究较少,具体指标没有系统的实验数据作为支撑。对HH油田C8储层以污水作为回注水源的注入水水质标准进行研究,主要采用岩心驱替实验及动态腐蚀实验得出注入水中的悬浮物粒径中值、悬浮物含量、含油量、细菌含量等主要控制指标。结果表明:悬浮物粒径中值指标<2.0μm;悬浮物含量指标<3 mg/L;含油量指标<15 mg/L;细菌含量指标<24个/mL。该结果为HH油田污水回注水质标准提供了具体依据,也为类似区块的注水水质研究提供了参考。

Presently, research on the standard of water quality for water injection in low porosity low permeability oil reservoirs is less. Also, there are no systemic data of experiment to support specific indicators. The water quality standard of produced water reinjection in C8 reservoir of HH oilfield was researched, the main control indicators including solid suspended particle size, suspended matter content, oil content and bacteria content were obtained by core flooding experiment and dynamic corrosion test. The result shows that, the standard of median particle size of SS is 2.0 μm; the standard of content of SS is 3 mg/L; the standard of content of suspended oil is 15 mg/L; the standard of content of SRB is 24/mL. The result can provide a specific basis for water injection development in HH oilfield. It also can be seen as a reference for water injection development in other reservoirs.