凝油结构形成过程中扰动对其力学特征的影响  

Influence of Disturbance During Structural Formation on the Mechanical Characteristics of Oil Gels

作　　者：刘洪飞 卢亚男 林万里 巴红兵 宋世国 杨鑫 李庆[1] 王坤 陈朝辉 刘梦亚 李宇卓 LIU Hong-fei;LU Ya-nan;LIN Wan-li;BA Hong-bing;SONG Shi-guo;YANG Xin;LI Qing;WANG Kun;CHEN Chao-hui;LIU Meng-ya;LI Yu-zhuo(China Petroleum Planning and Engineering Institute,Beijing 100083,China;East Branch,Petrochina Natural Gas Marketing Company,Shanghai 200120,China;Pipechina Xinjiang Gas Pipeline Transportation Company Limited,Changsha Hunan 410000,China;China National Offshore Oil Corporation,Guangdong Natural Gas Company Limited,Zhuhai Guangdong 519000,China;Suzhou Ganghua Gas Company Limited,Suzhou Jiangsu 215000,China;China University of Petroleum(Beijing),Beijing 102249,China)

机构地区：[1]中国石油规划总院,北京100083 [2]中国石油天然气销售东部分公司,上海200120 [3]国家管网集团新疆煤制天然气外输管道有限责任公司,湖南长沙410000 [4]中海广东天然气有限责任公司,广东珠海519000 [5]苏州港华燃气有限公司,江苏苏州215000 [6]中国石油大学(北京),北京102249

出　　处：《当代化工》2023年第1期177-182,共6页Contemporary Chemical Industry

基　　金：国家自然科学基金资助项目,基于微纳米尺度液滴间相互作用的油水乳化分散理论研究(项目编号:51774303)。

摘　　要：输油管道工程上“活动管道”是指通过提前启泵降低胶凝原油的结构强度,以降低管道再启动所需压力或者延长停输时间,其本质正是由于凝油流变力学特征与结构形成过程中经历的剪切历史有关。通过改变油样在动态剪切降温过程中的降温速率和施加剪切率值两种方式来改变扰动特性,并运用能量耗散定量表征其扰动强度。结果表明:随着扰动过程中输入能量耗散的增大,凝油结构的屈服应力以二次函数关系减小,而屈服应变呈现增长的趋势,体现出结构强度减弱,延性增强。The “transitory restart” in the engineering of petroleum transportation pipeline refers to implementing a transitory startup of the pump to reduce the structural strength of oil gels, and further to reduce the minimum pressure required for successful restart and to save restart time. The essence of transitory restart is that the rheological characteristics of gelled oils are influenced by the shear history during structural formation. In the present work, the disturbance properties of oil samples were changed by changing the cooling rate and the imposed shear rate during the dynamic cooling process, and the index of energy dissipation was used to quantitatively describe the disturbance intensities. The yield stress of oil gels decreased monotonically with the increase of input energy dissipation in the disturbance process, following a quadratic functional relationship model, whereas the yield strain showed the opposite trends, indicating a weakened structural strength and enhanced ductility.

关 键 词：胶凝原油 剪切历史 再启动 能量耗散 屈服应变 

分 类 号：TE832[石油与天然气工程—油气储运工程]