摘要
为防止沥青质沉积堵塞油井,需明确垂直井筒内流体携沥青质颗粒运移特性。通过静态沉降试验探究不规则形状沥青质颗粒沉降末速规律,采用垂直井筒液携固流动试验装置研究不同因素对沥青质运移临界流速的影响程度,建立沥青质颗粒沉降末速和运移临界流速计算公式。结果表明:沥青质表面不均匀性增大了沉降阻力,使沉降等效直径小于颗粒实测粒径;运移临界流速与颗粒粒径成正比、与液相黏度成反比,颗粒体积分数对运移临界流速影响较小;相同条件下流体携沥青质运移临界流速为沉降末速的1.182倍。
In order to prevent asphaltene deposition from clogging oil wells,it is necessary to clarify the transport characteristics of fluid carrying asphaltene particles in vertical wellbore.The law of terminal equilibrium settling velocity of irregularly shaped asphaltene particles was explored by static sedimentation experiment.The vertical wellbore liquid-carrying flow experimental device was used to investigate the influence of different factors on the critical velocity of asphaltene transport.The correlations for calculating the terminal equilibrium settling velocity and critical velocity of irregular asphaltene particles were established.It is found that the surface inhomogeneity of asphaltene particles increases the settlement resistance and makes the settlement equivalent diameter smaller than the measured particle size.The particle size is positively correlated with the critical velocity,while the liquid viscosity is negatively correlated with the critical velocity,and the particle concentration has little effect on the critical velocity of migration.Under the same conditions,the critical velocity of fluid carrying asphaltene is 1.182 times of the terminal equilibrium settling velocity.
作者
罗荣
乔星亚
杨小辉
熊瑞颖
李宁博
郭继香
LUO Rong;QIAO Xingya;YANG Xiaohui;XIONG Ruiying;LI Ningbo;GUO Jixiang(Northwest Oilfield Branch,SINOPEC,Urumqi 830011,China;Research Institute of Unconventional Oil and Gas in China University of Petroleum(Beijing),Beijing 102249,China)
出处
《中国石油大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2024年第3期127-133,共7页
Journal of China University of Petroleum(Edition of Natural Science)
基金
国家自然科学基金项目(52174047)
中国石油化工股份有限公司项目(P21063-3)。
关键词
垂直井筒
沉降等效直径
沉降末速
临界流速
沥青质颗粒
vertical wellbore
equivalent diameter of settlement
terminal equilibrium settling velocity
critical velocity
as-phaltene particle
