驱油用聚合物黏均相对分子质量测量方法误差分析  

Error Analysis of Measurement Method of Viscosity Average Molecular Weight of Polymer for Oil Displacement

作　　者：张昶 Zhang Chang(Exploration and Development Research Institute,PetroChina Daqing Oilfield Co.,Ltd.,Daqing,Heilongjiang163712,China)

机构地区：[1]中国石油大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《石油工业技术监督》2021年第7期21-25,共5页Technology Supervision in Petroleum Industry

基　　金：国家重大科技专项“大庆长垣特高含水油田提高采收率示范工程”(编号:2016ZX05054);中国石油天然气股份公司重大科技专项“大庆油气持续有效发展关键技术研究与应用”(编号:2016E-0207)。

摘　　要：黏均相对分子质量是影响聚合物与油层匹配的关键参数。分析了驱油用聚合物黏均相对分子质量测量的不同标准测量方法和抗盐聚合物常用测量方法中,可能遇到的问题、不同测量方法的差别及引起测量结果偏离真实值原因,通过改变测量条件、利用相关测量数据对现有标准测量方法提出改进意见。结果表明:黏均相对分子质量测量过程中,减小所选溶液的浓度,并使用毛细管直径更小的乌氏黏度计或使用Kraemer方程处理测量数据,会使测量结果更接近真实值。不同类型的抗盐聚合物都不适于用水溶液作溶剂来测量黏均相对分子质量。Viscosity average molecular weight is a key parameter affecting the matching between polymer and reservoir.The possible problems in the measurement of the viscosity average molecular weight of polymer used for oil flooding using different standard meth⁃ods and the measurement of the viscosity average molecular weight of salt resistant polymers using common methods,the differences of different measurement methods and the reasons for the deviation of the measurement results of different measurement methods from the true value are analyzed,and the improvement suggestions of the existing standard measurement methods are put forward by changing the measurement conditions and using relevant measurement data.The results show that:in the process of viscosity average molecular weight measurement,reducing the concentration of the selected solution and using Ubbelohde viscometer with smaller capillary diame⁃ter or processing the measurement data using Kraemer equation can make the measurement results closer to the real value.Water is not suitable as solvent in the measurement of viscosity average molecular weight of different types of salt resistant polymers.

关 键 词：黏均相对分子质量 行业标准 误差分析 Huggins方程 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]