海上油田采出液含聚浓度检测新方法

New Method to Test Polymer Concentration in Produced Liquid of Offshore Oilfield

应用胶体滴定法建立了渤海油田采出液中含聚浓度的检测分析方法,分析了胶体滴定法实验原理,建立了标准曲线,给出了适用条件,进行了胶体滴定法、淀粉—碘化镉法、定氮法等浓度检测实验方法对比研究,对注聚合物井返排样品和采出液含聚浓度进行了室内实验和平台现场检测。结果表明,胶体滴定法能够快速准确地检测采出液含聚浓度,且检测过程中试剂配制安全、无毒,仪器简单、操作方便,样品浓度检测范围广,适合于海上油田采出液含聚浓度快速检测的实际需求。

Colloid titration method is used to test and analyze polymer concentration in produced liquid of Bohai Oil Field. Based on analysis of colloid titration testing principle, the standard curve is established to give the appropriate conditions for application and compare colloid titration method with starch iodide chromium method and azotification method. The flow back samples from polymer injection wells are brought under inspection both at the laboratory and on the offshore platform for testing of polymer concentration in produced liquid. The results show that colloid titration method can test polymer concentration rapidly and accurately. In addition, formulation of agents is safe and non-toxic in the testing process. The instrument is simple and easy to operate, with a wide range of sample testing. This method can meet the demand for rapid testing of polymer concentration in produced liquid of offshore oilfields.