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稠油-水混输海管停输再启动压力预测

Prediction of restarting pressure of shut-down offshore pipe for heavy oil-water mixed transportation
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摘要 为保障海底稠油集输管线的安全停输与顺利启动,以旅大稠油为研究对象,利用Anton Paar Rheolab QC流变仪分析稠油及其乳状液流变特征与再启动力学响应特性,通过SPSS软件,对正交启动实验数据进行非线性回归分析,建立四参量七系数的启动应力模型;自主研制了室内环道再启动实验装置,分析停运管线在不同工况下启动压力的变化规律,将基于启动应力模型的再启动压力预测值与实测值相比较,评估其预测可靠性。结果表明,稠油乳状液初始启动应力随时间的变化可分为3阶段,即启动应力上升阶段、衰减阶段、平衡阶段;再启动压力预测值与实测值平均相对误差绝对值为16.38%,再启动压力随温度升高而降低,随启动流量升高而升高,适当升高启动流量能减少管线启动时间,但将伴随着再启动压力的升高。 To ensure the safe shutdown and smooth start-up of heavy oil gathering and transportation subsea pipeline,taking LD heavy oil as the research object,the rheological characteristics and mechanical response characteristics of restart for heavy oil and its emulsion were analyzed by Anton Paar Rheolab QC rheometer.The orthogonal start-up experimental data were analyzed by SPSS software,and a start-up stress model with four parameters and seven coefficients was established.An indoor loop restart experimental device was developed to analyze the variation of the start-up pressure of the shutdown pipeline under different working conditions.The predicted value of restart pressure based on the start-up stress model is compared with the measured value to evaluate the reliability of the prediction.The results show that the changes of initial start-up stress of heavy oil emulsion with time can be divided into three stages,including rising stage,declining stage and equilibrium stage.The average absolute relative error between the predicted value and the measured value of the restart pressure is 16.38%.The restart pressure decreases with the increase of temperature and increases with the increase of start-up flow rate.And with the increase of flow rate properly can shorten the start-up time,but also can enlarge the restart pressure at the same time.
作者 王帅 薛荞荞 王荣元 崔凯翔 敬加强 WANG Shuai;XUE Qiaoqiao;WANG Rongyuan;CUI Kaixiang;JING Jiaqiang(School of Petroleum Engineering and Environmental Engineering,Yan’an University,Yan’an,Shaanxi 716000,P.R.China;Shaanxi Yanchang Petroleum(Group)Co.,Ltd.Pipeline Transport Gas First Branch,Yan’an,Shaanxi 716000,P.R.China;Shaanxi Yanchang Petroleum(Group)Co.,Ltd.Pipeline Transport First Branch,Yulin,Shaanxi 719000,P.R.China;School of Oil&Gas Engineering,Southwest Petroleum University,Chengdu 610500,P.R.China;Oil&Gas Fire Protection Key Laboratory of Sichuan Province,Chengdu 611731,P.R.China)
出处 《重庆大学学报》 CSCD 北大核心 2022年第3期88-98,共11页 Journal of Chongqing University
基金 国家自然科学基金资助项目(51779212) 陕西省自然科学基础研究计划资助项目(2021JQ-633) 陕西省教育厅自然科学研究项目(21JK0995) 延安大学博士科研启动资助项目(YDBK2020-01)。
关键词 稠油乳状液 多相流 流变学 启动压力 模型 heavy oil emulsions multiphase flow rheology start-up pressure model
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