基于管柱式气液旋流分离器的井口多管束分离装置结构优化  

Structure Optimization of Wellhead Multistage Bundle Separator Based on Gas-Liquid Cylindrical Cyclone

作　　者：李铁阳 王志华[1] 戚亚明 王薇[3] 许云飞 LI Tie-yang;WANG Zhi-hua;QI Ya-ming;WANG Wei;XU Yun-fei(Key Laboratory for Enhanced Oil&Gas Recovery of the Ministry of Education,Northeast Petroleum University,Daqing 163318,China;Xinjiang Petroleum Engineering CO.,LTD,Design Branch,Karamay 834000,China;Oil Recovery Plant No.8,PetroChina Daqing Oilfield Company Limited,Daqing 163514,China)

机构地区：[1]东北石油大学提高油气采收率教育部重点实验室,黑龙江大庆163318 [2]中油(新疆)石油工程有限公司设计分公司,新疆克拉玛依834000 [3]中国石油大庆油田有限责任公司第八采油厂,黑龙江大庆163514

出　　处：《数学的实践与认识》2022年第10期147-160,共14页Mathematics in Practice and Theory

基　　金：国家自然科学基金(52074090,52174060)。

摘　　要：单井计量是油田开发过程中的一项重要工作,而气液分离效果直接影响到计量结果的准确性.管柱式气液旋流分离器(GLCC)因体积小、效率高、适用范围宽而被广泛应用,但基于GLCC发展多级一体化分离装置一直被受到关注.考虑一级分离入口斜管倾角、一级分离入口形状、气相分离弯管仰角及二级分离管束规格,采用多相流Mixture模型和雷诺应力RSM模型,对基于GLCC的井口多管束分离装置结构形式进行了优化,并定量揭示了不同结构形式下的气液分离效率.结果表明,在经过GLCC一级旋流分离后,进入多管束二级分离单元,能够进一步改善气液分离效果,提高气液分离效率,但两级分离单元的结构特征均对分离性能具有显著影响,优化GLCC一级旋流分离入口斜管的倾角为30°,入口形状为圆形,相应可获得稳定的压力分布、较为均匀的流场迹线和更高的气液分离效率,优化气相分离弯管的仰角为35°、二级分离细管束数量与管径分别为6支和40mm,可使对应分离压降在3kPa,气液分离效率接近70%.Single well metering is an important work in oilfield development,and the accuracy of metering is directly affected by gas-liquid separation.Gas-Liquid cylindrical cyclone(GLCC) has been widely used due to small size,high efficiency and strong applicability.The development of multistage integrated separator based on GLCC has been paid much attention.Considering the inclination angle and shape of primary separation portal,the elevation angle of gas phase separation elbow and the specification of secondary separation bundle,the multiphase flow mixture model and Reno stress RSM model were used,the structure of wellhead multistage bundle separator based on GLCC was optimized,and the gas-liquid separation efficiency under different structure was quantitatively revealed.The results indicate that the gas-liquid separation effect and efficiency can be further improved by entering the multi-tube bundle secondary separation after the GLCC primary separation,and the separation performance is significantly affected by the structural characteristics of the secondary separation.When the inclination angle of GLCC primary separation portal is 30° and the inlet shape is circular,stable pressure distribution,more uniform flow track and higher gas-liquid separation efficiency can be obtained.When the elevation angle of gas phase separation elbow is 35°,the number and diameter of secondary separation tube bundles are 6 and 40 mm,the separation pressure drop is 3 kPa and the separation efficiency is close to 70%.

关 键 词：压力分布 流场特性 分离效率 结构优化 管柱式气液旋流分离器 多管束分离 

分 类 号：TE863.1[石油与天然气工程—油气储运工程]