一种新的胶凝原油管流启动屈服应力测算方法  

A new calculation method of start-up yield stress for gelled crude oil pipe flow

作　　者：肖文涛[1] 张国忠[1] 兰浩[2] 刘刚[1] 郝小虎[3] 

机构地区：[1]中国石油大学(华东)储运与建筑工程学院,山东青岛266580 [2]中国石油管道科技研究中心,河北廊坊065000 [3]中国石油管道公司秦皇岛输油分公司,河北秦皇岛066000

出　　处：《油气储运》2012年第4期260-262,328,共3页Oil & Gas Storage and Transportation

基　　金：国家自然科学基金项目"原油管道内石蜡沉积物的力学破坏特性研究";50904077;中央高校基本科研业务费专项基金资助项目"海上热油管道启动理论研究";09CX04015A;中国石油科技创新基金资助项目"胶凝原油管道启动屈服前锋传递规律研究";2010D-5006-0606

摘　　要：准确预测胶凝原油的启动屈服应力,是实现含蜡原油管道安全经济输送、避免"凝管"事故发生的关键所在。以管流试验数据为基础,分析了管道轴向受压时间差异对胶凝原油启动屈服应力测量结果造成的影响。结果表明:在管流装置中,启动屈服应力的测量值随测量管段长度的增大呈减小的趋势。结合三参数双曲模式触变方程,提出了一种基于非线性最小二乘拟合原理的数据处理方法,能够求得测量管长趋于无限短时胶凝原油的启动屈服应力,统一了对特定工况下凝油结构强度的评价标准。To accurately predict the start-up yield stress for gelled crude oil is the key to realize safe and economic transportation of waxy crude oil pipeline and avoid its condensation accident.Based on pipe flow test data,impact of pipeline axial compression time difference on the measured result of gelled crude oil start-up yield stress is analyzed.The results indicate that in the pipe flow device,the measured value of start-up yield stress decreases with the increase of the length of measured pipe section.Combined with three-parameter hyperbolic model thixotropic equation,a data-processing method based on nonlinear least squares fitting principle is proposed,which can calculate the start-up yield stress of gelled crude oil when the measured pipe tends to be unlimitedly short and unify evaluation standards of gelled oil structural strength under specific condition.

关 键 词：胶凝原油 管流试验 启动屈服应力 测量管长 结构强度 

分 类 号：TE832[石油与天然气工程—油气储运工程]