沥青质颗粒在垂直井筒中的运移特征流速
Characteristic flow rate of asphaltene particles in vertical wellbore
罗荣 1乔星亚 2杨小辉 1熊瑞颖 2李宁博 1郭继香2
作者信息
- 1. 中国石化西北油田分公司,新疆乌鲁木齐 830011
- 2. 中国石油大学(北京)非常规油气科学技术研究院,北京 102249
- 折叠
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.
Abstract
In order to prevent asphaltene deposition from clogging oil wells,it is necessary to clarify the transport characteris-tics 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 exper-imental 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.
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Key words
vertical wellbore/equivalent diameter of settlement/terminal equilibrium settling velocity/critical velocity/as-phaltene particle引用本文复制引用
基金项目
国家自然科学基金(52174047)
中国石化项目(P21063-3)
出版年
2024
国家科技期刊平台
NSTL
万方数据