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本文较详细地介绍了大港板桥油田300m~3/d海水处理及注入试验站的工艺流程及试验情况。大量试验数据说明:海水经过沉淀、过滤后,悬浮物的含量可下降到2～3mg/l,且99.9％的颗粒小于5.5μm,膜滤因数均大于15;海水经水射器一级真空脱氧和化学脱氧后,含氧量可下降为0.05mg/l,腐蚀率可下降到 0.044mm/a;投加次氯酸钠后海水中的硫酸盐还原菌和腐生菌可降低到100个/ml以下;经计算和室内试验,原海水注入地层后易结垢,可投加5mg/l ATMP防垢剂进行防垢。从而证明了处理后的海水完全可以代替地下水用于油田注水。
This paper introduces the process and test of 300m ~ 3 / d seawater treatment and injection test station in Banqiao Oilfield in detail. A large number of experimental data show that after the seawater is precipitated and filtered, the content of the suspended matter can be reduced to 2-3mg / l, 99.9% of the particles are smaller than 5.5μm, and the membrane filtration factors are all greater than 15. The seawater is vacuum deoxygenated And chemical deoxidation, the oxygen content can be reduced to 0.05mg / l, the corrosion rate can be reduced to 0.044mm / a; adding sodium hypochlorite in seawater after the sulfate-reducing bacteria and saprophytic bacteria can be reduced to less than 100 / ml; Calculation and laboratory tests, the original seawater into the stratum after scaling, cast 5mg / l ATMP scale inhibitor for scale. This proves that treated seawater can completely replace groundwater for oilfield waterflooding.