油田水质化验中应用苏林分类时SO_4^(2-)测定方法的选择

Measurement method selection for SO_4^(2-) determination in oilfield water test with Surin classification

延长组油田水和地表水因为其矿化度水型的差异,苏林分类时对SO_4^(2-)测定结果的准确度要求也不同。根据《油田水分析方法SY/T5523—2006》推荐的SO_4^(2-)3种测定方法和已废止但仍在使用的EDTA络合滴定法,从经济因素、检测限和检测需求等方面进行了讨论,认为在进行苏林分类时SO_4^(2-)测定方法优先考虑浊度计法。

The different salinity water type in oilfield water and surface water has caused different requirements of accuracy in determining SO42– with Surin classification.This article describes three measuring methods of SO42-according to Oilfield Water Analysis Method Of SY/T5523-2006SO42-and EDTA complexometric titration that has been abolished but still in use with respect to economic factors,detection limit,and testing requirements.It concludes that turbidity meter method is preferred in Surin classified SO42-determination.