复合缓蚀剂在油田采出水中的缓蚀性能研究

发布时间：2018-10-26 09:05

【摘要】：目的为了解决油田采出水的腐蚀问题,制备一种复合缓蚀剂,并研究环境因素对缓蚀性能的影响规律,为油田采出水的科学防腐提供理论上的依据。方法采用含磷咪唑啉季铵盐和钨酸钠复配了一种绿色的油田采出水处理复合缓蚀剂,用动态失重法对复合缓蚀剂的缓蚀性能进行了评价,并系统地研究了介质的温度、pH值、矿化度及流速对缓蚀性能的影响。结果油田采出水的温度为55℃、pH值=7.0、流速为2.5 m/s和矿化度为36 g/L时,复合缓蚀剂的最佳投加质量浓度为60 mg/L。该条件下Q235钢的腐蚀速率为0.0269 mm/a,能够满足油田采出水回注的标准要求。腐蚀速率随着缓蚀剂质量浓度的增加而减小,随着采出水温度的升高而增大。采出水的矿化度为32 g/L时,对腐蚀速率的影响最大。采出水的流速为1.2~3.0 m/s和采出水的pH值接近于中性时,其对腐蚀速率的影响较小。结论复合缓蚀剂是一种环境友好型油田采出水处理缓蚀剂,缓蚀性能优良。
[Abstract]:Objective in order to solve the corrosion problem of oilfield produced water, to prepare a compound corrosion inhibitor, and to study the influence of environmental factors on corrosion inhibition performance, to provide a theoretical basis for scientific anticorrosion of oilfield produced water. Methods A green compound corrosion inhibitor for oilfield produced water treatment was prepared by using phosphor imidazoline quaternary ammonium salt and sodium tungstate. The corrosion inhibition performance of the compound inhibitor was evaluated by dynamic weightlessness method, and the temperature and pH value of the medium were systematically studied. Effects of salinity and flow rate on corrosion inhibition performance. Results under the conditions of 55 鈩，

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