导数紫外光谱法在驱油聚合物浓度检测中的应用

Application of derivative ultraviolet spectrometry to measurementof polymer flooding agent concentration

唐恒志 叶仲斌 陈洪 吴优

TANG Hengzhi YE Zhongbin CHEN Hong WU You

西南石油大学油气藏地质及开发工程国家重点实验室

State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation in Southwest Petroleum University, Chengdu 610500, China

针对油田聚合物驱普遍采用淀粉—碘化镉比色法和浊度法检测注入、产出液中聚合物浓度时存在的不足，利用导数光谱技术，在室内开展了导数紫外光谱法在驱油聚合物浓度检测中的应用研究。对该方法的精密度、加标回收率及主要影响因素进行了探讨，确定了测量技术指标，证明该方法可用于疏水缔合聚合物AP-P4和超高分子量部分水解聚丙烯酰胺MO4000的浓度测定，为聚合物浓度的检测提供了一种新的技术手段。

The colorimetry of amylum-cadmium iodide and the turbidimetry are commonly used to determine the concentration of polymer in the injected and produced fluid. In view of the shortcomings of the methods, the derivative spectrographic technique is used, as well as the lab research is conducted on the application of the derivative ultraviolet spectrometry to the measurement of polymer flooding agent concentration. A discussion on the accuracy, the rate of recovery, and the main influencing factors of the technique is made. The technical indexes are determined. It is proved that the technique can be used to the concentration measurement of the hydrophobic associating polymer AP-P4 and the super-high molecular weight partially hydrolyzed polyacrylamide MO4000. It is a new technique for the concentration measurement of polymers in oilfields.