化工进展 ›› 2024, Vol. 43 ›› Issue (6): 2996-3006.DOI: 10.16085/j.issn.1000-6613.2023-0889

• 化工过程与装备 • 上一篇    

水平管内高黏油水环输送减阻特性分析

敬佩瑜1(), 朱宇1, 孙杰1,2(), 黄婉妮1, 郭雨莹1, 王娅婷3, 郑智益1, 丁伟1   

  1. 1.西南石油大学石油与天然气工程学院,四川 成都 610500
    2.油气消防四川省重点实验室,四川 成都 611731
    3.中煤科工重庆设计研究院(集团)有限公司,重庆 400016
  • 收稿日期:2023-05-30 修回日期:2023-10-19 出版日期:2024-06-15 发布日期:2024-07-02
  • 通讯作者: 孙杰
  • 作者简介:敬佩瑜(1991—),女,硕士,主要从事油气储运工程实验教学与科研工作。E-mail:winkok@163.com
  • 基金资助:
    国家自然科学基金企业创新发展联合基金重点合作项目(U19B2012);国家自然科学基金(52106208);四川省自然科学基金(2023NSFSC0924);西南石油大学开放实验基金(2022KSZ01036)

Analysis of drag reduction characteristics of water ring transportation in high viscosity oil horizontal pipeline

JING Peiyu1(), ZHU Yu1, SUN Jie1,2(), HUANG Wanni1, GUO Yuying1, WANG Yating3, ZHENG Zhiyi1, DING Wei1   

  1. 1.School of Oil & Natural Gas Engineering, Southwest Petroleum University, Chengdu 610500, Sichuan, China
    2.Oil & Gas Fire Protection Key Laboratory of Sichuan Province, Chengdu 611731, Sichuan, China
    3.CCTEG Chongqing Engineering (Group) Company Limited, Chongqing 400016, China
  • Received:2023-05-30 Revised:2023-10-19 Online:2024-06-15 Published:2024-07-02
  • Contact: SUN Jie

摘要:

随着人们对于石油资源需求的日益加深,常规原油逐渐枯竭。稠油的使用会成为一种趋势,世界稠油地质储量丰富,占全球石油剩余储量的70%,具有巨大的开发潜力和广阔的市场前景,但稠油自身具有黏度高、分子量大、流动性差的特点,这些性质为稠油的输送带来了极大的困难与挑战。因此,加快我国稠油输送技术及相关理论的研究创新是适应未来趋势变化的客观要求,是经济有效地开发输送稠油资源的必然选择。本文采用水环输送法对稠油水平管流减阻,用以探究水环包裹下的稠油水平管流阻力特性,分析入口含水率(5%~80%)、油(0.65~1.57m3/h)、水(0.09~2.13m3/h)相流量对于水环润滑减阻效果以及稠油流型的影响,自主设计水环输送稠油实验环道,引入有效粗糙度k*,建立环状流压降预测修正模型,分析讨论流型特征及形成环状流时的油水流量范围,结果表明:在一定条件下形成的水环能够有效地对稠油输送进行减阻;水环可以有效润滑管壁;修正后的压降预测模型与实验值对比相对误差介于±10%,RMSE=0.02,水环输送压降仅占纯油输送压降的0.01~0.24;油相流量较高时应注意水相流量,避免过大导致输油效率η以及减阻率DR下降。

关键词: 水环输送, 减阻, 水平管, 高黏, 压降

Abstract:

With the increasing demand for oil resources, conventional crude oil is gradually depleting. The use of heavy oil is becoming a trend as the world possesses abundant reserves of heavy oil, accounting for 70% of the global remaining oil reserves. Heavy oil has immense development potential and vast market prospects. However, it also possesses high viscosity, high molecular weight, and poor fluidity, posing significant difficulties and challenges for its transportation. Therefore, accelerating the research and innovation of heavy oil transportation technology and related theories in China is an objective requirement to adapt to future trend changes, and it is an inevitable choice for the economic and efficient development of heavy oil resources through integrated transportation. This paper adopts the method of water annulus transportation to reduce the resistance of horizontal flow in heavy oil, aiming to explore the characteristics of flow resistance in horizontal pipe under water annulus confinement. It analyzes the effects of inlet water cut (5%—80%), oil flow rate (0.65—1.57m3/h), and water flow rate (0.09—2.13m3/h) on the lubrication and drag reduction effect of water annulus, as well as the influence on the flow pattern of heavy oil. An experimental annular loop for water annulus transportation of heavy oil is independently designed, and an effective roughness is introduced. A predictive correction model for annular flow pressure drop is established to analyze and discuss the flow pattern characteristics and the range of oil-water flow rate during the formation of annular flow. The results indicate that the water annulus formed under certain conditions can effectively reduce the drag in the transportation of heavy oil. The water annulus can effectively lubricate the pipe wall. The revised pressure drop prediction model has a relative error of comparison with the experimental values within ±10%, and the RMSE is 0.02. The pressure drop in water annulus transportation accounts for only 0.01—0.24 of the pressure drop in pure oil transportation. When the oil flow rate is high, attention should be paid to the water flow rate to avoid excessive values that may lead to a decrease in the oil transportation efficiency η and drag reduction rate DR.

Key words: water ring transport, drag reduction, horizontal tube, high viscosity, pressure drop

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