考虑稠油黏度影响的潜油电泵模拟与优化

doi:10.11885/j.issn.1674-5086.2021.04.13.06

西南石油大学学报(自然科学版) ›› 2023, Vol. 45 ›› Issue (2): 170-177.DOI: 10.11885/j.issn.1674-5086.2021.04.13.06

考虑稠油黏度影响的潜油电泵模拟与优化

刘永辉¹, 谢在香¹, 周宇驰², 彭振华³, 刘重伯⁴

1. 油气藏地质及开发工程国家重点实验室·西南石油大学, 四川成都 610500;
2. 中国石油吉林油田油气工程研究院, 吉林松原 138000;
3. 中国石化西北油田分公司工程技术研究院, 新疆乌鲁木齐 830011;
4. 中国石油华北油田公司工程技术研究院, 河北任丘 062552

收稿日期:2021-04-13 发布日期:2023-05-05
通讯作者: 刘永辉,E-mail:swpilyh@126.com
作者简介:刘永辉,1977年生,男,汉族,四川仁寿人,教授,博士,主要从事采油采气工程领域的教学和科研工作。E-mail:swpilyh@126.com
谢在香,1997年生,女,汉族,四川成都人,硕士研究生,主要从事采油采气工艺方面的研究。E-mail:1092347762@qq.com
周宇驰,1990年生,男,汉族,吉林白城人,工程师,主要从事油气田开发方面的研究工作。E-mail:155089281@qq.com
彭振华,1979年生,男,汉族,新疆博乐人,高级工程师,硕士,主要从事机械采油研究与推广工作。E-mail:2468695@qq.com
刘重伯,1994年生,男,满族,辽宁盘锦人,工程师,硕士,主要从事油田开发方案规划与采油工艺方面的研究工作。E-mail:cyy_liuzb@petrochina.com.cn

CFD Simulation and Optimization of Electric Submersible Pump Considering the Effect of Heavy Oil Viscosity

LIU Yonghui¹, XIE Zaixiang¹, ZHOU Yuchi², PENG Zhenhua³, LIU Zhongbo⁴

1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
2. Research Institute of Oil and Gas Engineering, Jilin Oilfield, PetroChina, Songyuan, Jilin 138000, China;
3. Research Institute of Engineering Technology, Northwest Oilfield Company, SINOPEC, Urumqi, Xinjiang 830011, China;
4. Engineering Technology Research Institute, PetroChina Huabei Oilfield Company, Renqiu, Hebei 062552, China

Received:2021-04-13 Published:2023-05-05

摘要/Abstract

摘要： 潜油电泵采油是目前最常用的人工举升方式之一。当应用于稠油井时，受入泵流体高黏度的影响，使潜油电泵特性曲线偏离抽水时的特性曲线，导致潜油电泵合理运行窗口变窄，因此，针对水设计的离心泵结构难以适应稠油的高黏环境。针对上述问题，基于CFD数值模拟方法，系统地进行了潜油电泵在高黏条件下增压特性的研究，结果表明，随流体黏度增加，流体流动摩擦阻力更大，流体与叶片间相互作用增大，叶轮与导轮的进出口压差减小，流速降低，流体流动状态从湍流转变为层流，叶轮及导轮内回流区域的尺寸及数量均减小。同一黏度下，离心泵扬程随排量的增加而降低；同一排量下，离心泵扬程随着黏度的增大而显著降低。基于因素分析，考虑黏度影响，进而对离心泵结构参数进行了优化设计，最优结构为：入口宽度16.6 mm，叶片数6片，出口宽度21.9 mm，叶包角60o。相比于原离心泵，在黏度为400 mPa·s，允许排量范围内，扬程最大增幅28%。

关键词: 黏度, 潜油电泵, 计算流体力学, 特性曲线, 参数优化

Abstract: Electric submersible pump (ESP) is one of the most common artificial lift techniques. However, when it is applied to heavy oil wells, due to the influence of high viscosity, the performance curves of ESP deviates from the common ones, which caused the effective application window of ESP. Therefore, the centrifugal pump's structural parameters are designed under water flow condition, which is difficult to adapt to the high viscosity environment of heavy oil wells. In view of the above problems, based on the computational fluid dynamics (CFD) numerical simulation method, we study the pressurization characteristics of ESP under the high viscosity condition. The results show that with the increase of fluid viscosity, the frictional force increases, and the interaction effect also shows an increase trend. However, the pressure difference between the impeller inlet and the diffuser outlet decreases, which leads to the flow rate decrease. Meanwhile, the flow regime inside ESP changes from turbulent flow to laminar flow, and recirculation flow area inside the impeller and diffuser blades decrease. Under the same viscosity condition, the head of centrifugal pump decreases with the increase of displacement. Under the same liquid flow rate, the head of centrifugal pump decreases significantly with the increase of viscosity. Based on factor analysis, by taking the effect of viscosity into consideration, the structural parameters of the centrifugal pump are optimized. The optimal structures are as follows: inlet width is 16.6 mm, blade number is 6 pieces, outlet width is 21.9 mm, and blade inclusion angle is 60o. Compared with the original centrifugal pump, when the viscosity is 400 mPa·s, under the submersible electric pump works in allowable flow rate range, the maximum increase of head is 28%.

Key words: viscosity, electric submersible pump, CFD, performance curves, optimization of structural parameter

中图分类号:

TE355

刘永辉, 谢在香, 周宇驰, 彭振华, 刘重伯. 考虑稠油黏度影响的潜油电泵模拟与优化[J]. 西南石油大学学报(自然科学版), 2023, 45(2): 170-177.

LIU Yonghui, XIE Zaixiang, ZHOU Yuchi, PENG Zhenhua, LIU Zhongbo. CFD Simulation and Optimization of Electric Submersible Pump Considering the Effect of Heavy Oil Viscosity[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2023, 45(2): 170-177.

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考虑稠油黏度影响的潜油电泵模拟与优化

CFD Simulation and Optimization of Electric Submersible Pump Considering the Effect of Heavy Oil Viscosity

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