摘要
井下稠油掺稀是高效开采稠油资源的一种有效方法,为此,结合旋流生成技术和拉瓦尔喷管原理设计了一种新型井下混配器。通过开展系统的数值模拟工作,揭示了该种新型混配装置的降黏携带特性随操作参数的变化规律。研究结果表明:轴向启旋和切向开孔诱导反向旋流的设计理念可有效实现稠油和稀油的掺混,降低稠油黏度,促进稠油开采;该种混配器的降黏和稠油举升携带效果受稠油入口-总出口、稀油入口-稠油入口的压差影响,降低总出口压力、提高稀油入口压力有助于降低混合黏度,提高掺稀比和降黏比。最后建议结合产量要求和输送需求合理设置工况,减少稀油用量的同时提高开采量,降低输送黏度。研究结论可以为提高稠油开采产量提供理论参考。
Downhole dilution of heavy oil is an effective method for efficient exploitation of heavy oil resources.For this purpose,a new downhole mixer was designed by combining swirl generation technique and Laval nozzle principle.Numerical simulation was made to clarify the variation of viscosity reduction and carrying characteristics of this new mixer with various operating parameters.The study results show that the design concept of axial swirl and tangential opening induced reverse swirl can mix heavy oil and light oil effectively to reduce the viscosity of heavy oil and thus stimulate the heavy oil recovery.The viscosity reduction and heavy oil lifting and carrying effects of this new mixer are influenced by the pressure difference between heavy oil inlet and main outlet as well as that between light oil inlet and heavy oil inlet.Reducing the main outlet pressure and increasing the light oil inlet pressure enable to reduce the mixing viscosity and increase the dilution ratio and viscosity reduction ratio.The working conditions should be set reasonably based on the demands of production and transportation,so as to reduce the consumption of light oil,increase the heavy oil production and reduce the transportation viscosity simultaneously.The conclusions can provide a theoretical reference for improving heavy oil recovery.
作者
刘硕
柯文奇
杨猛
侯林彤
牛骏
许晶禹
Liu Shuo;Ke Wenqi;Yang Meng;Hou Lintong;Niu Jun;Xu Jingyu(State Key Laboratory of Shale Oil and Gas Enrichment Mechanism and Effective Development;Institute of Mechanics,Chinese Academy of Sciences;Sinopec Petroleum Exploration and Development Research Institute;College of Engineering Science,University of Chinese Academy of Sciences)
出处
《石油机械》
北大核心
2022年第6期91-97,共7页
China Petroleum Machinery
基金
页岩油气富集机理与有效开发国家重点实验室开放基金项目“高效开采低压天然气井引射机理与技术优化研究”(G5800-18-ZS-KFZY-006)
国家自然科学基金青年基金项目“磁强化旋流场内功能化磁性纳米粒子对液滴群演化的调控机制”(12102436)
国家自然科学基金面上项目“导流片型旋流场中非稀疏相油滴破裂、迁移与聚并规律研究”(51779243)。
关键词
稠油开采
混配器
数值模拟
混合黏度
掺稀比
降黏比
heavy oil recovery
mixer
numerical simulation
mixed viscosity
dilution ratio
viscosity reduction ratio
