摘要
高含水原油乳化含水率的测定对于低温集输工艺的推广尤为重要,采用蜡沉积冷指实验装置测试不同实验条件下的乳化含水率,通过Spearman相关系数考察影响因素之间的重叠关系,利用两步回归法建立乳化含水率与原油物性的关系,并进行多算法全局非线性回归参数的优化和误差分析。结果表明,温度从36℃降至26℃时,不同体系含水率下的乳化含水率从26.03%减小至3.00%;体系含水率从80%升至99%时,不同温度下的乳化含水率从31.23%减小至3.60%。基于全局优化算法的参数估计精度明显优于线性变换法,模型误差大部分均在±10%范围内,模型适用凝点以下10℃-凝点、含水率80%-95%、剪切速率20.1-84.5s^(‒1)的油水两相体系。研究结果可为低温集输工艺的流动安全保障提供实际参考。
In order to establish a universal model suitable for emulsifying water cut of high water cut crude oil at low tempera-ture,wax deposition cold finger experimental device was used to test emulsifying water cut under different experimental condi-tions,Spearman correlation coefficient was used to investigate the overlapping relationship between influencing factors,and the relationship between emulsifying water cut and crude oil physical properties was established by two-step regression method.The optimization and error analysis of global nonlinear regression parameters are also carried out.The results show that the emulsifi-cation water cut is related to shear condition,oil physical property and water phase composition.Collinearity exists between col-loid and water salinity and other factors.The accuracy of parameter estimation based on the global optimization algorithm is ob-viously better than that of the linear transformation method,and most of the model errors are within the range of±10%.The model applies to the oil-water two-phase system with the freezing point of 10℃-freezing point,water content of 80%-95%and shear rate of 20.1-84.5 s^(-1) below the freezing point.The research results can provide practical reference for the popularization of low temperature gathering and transportation technology of crude oil.
作者
刘清源
穆化巍
黄茜
傅新勇
胡俊平
郭自强
任春燕
LIU Qingyuan;MU Huawei;HUANG Qian;FU Xinyong;HU Junping;GUO Ziqiang;REN Chunyan(No.5 Oil Production Plant of PetroChina Huabei Oilfield Company,Shijiazhuang,Hebei 052360,China;PetroChina Huabei Oilfield Company,Renqiu,Hebei 062552,China)
出处
《世界石油工业》
2023年第5期69-75,共7页
World Petroleum Industry
关键词
高含水
低凝点
乳化含水率
普适性模型
回归分析
high water cut
low freezing point
emulsified water cut
universal model
regression analysis
作者简介
刘清源(1991-),男,工程师,2014年毕业于中国地质大学长城学院资源勘查工程专业,主要从事原油生产、集输管理工作。E-mail:cy5_lqy@163.com。
