CIESC Journal ›› 2023, Vol. 74 ›› Issue (7): 2898-2907.DOI: 10.11949/0438-1157.20230378

• Fluid dynamics and transport phenomena • Previous Articles     Next Articles

Water-lubricated drag reduction and pressure drop model modification for heavy oil pipeline

Yuying GUO1(), Jiaqiang JING1,2(), Wanni HUANG1, Ping ZHANG3, Jie SUN1,2, Yu ZHU1, Junxuan FENG1, Hongjiang LU1   

  1. 1.School of Petroleum and 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.Changqing Engineering Design Co. , Ltd. , Xi’an 710018, Shaanxi, China
  • Received:2023-04-17 Revised:2023-07-11 Online:2023-08-31 Published:2023-07-05
  • Contact: Jiaqiang JING


郭雨莹1(), 敬加强1,2(), 黄婉妮1, 张平3, 孙杰1,2, 朱宇1, 冯君炫1, 陆洪江1   

  1. 1.西南石油大学石油与天然气工程学院,四川 成都 610500
    2.四川省油气消防重点实验室,四川 成都 611731
    3.长庆工程设计有限公司,陕西 西安 710018
  • 通讯作者: 敬加强
  • 作者简介:郭雨莹(1996—),女,博士研究生,
  • 基金资助:


Based on a self-built water-lubricated heavy oil drag-reducing loop system, mineral oil and tap water with a viscosity ratio of 1176 and a density ratio of 0.9 were used to systematically study the effects of oil superficial velocity (0.12—0.93 m/s) and water superficial velocity (0.04—1.54 m/s) on the distribution of flow patterns, frictional pressure drop, and drag reduction effect in horizontal pipes. The applicability of the Rodriguez, Brauner, and Colombo models was evaluated. Considering the influence of oil core eccentricity, the Rodriguez model with the highest accuracy was modified around the mixed viscosity. The results indicate that annular flow is the main flow pattern in the experimental conditions. When the moisture content is between 0.04 and 0.93, there is always a minimum value in the pressure gradient, and it will increase in a parabolic form after exceeding this value. If the mixing flow rate is lower than the critical value, it will lead to a transition from annular flow/plug flow to stratified flow and the pressure drop will increase suddenly. A complete water film between the oil and the wall can effectively lubricate and reduce drag, with a maximum pressure reduction factor up to 73.1. A new calculation formula for mixed viscosity was provided, and the average relative error of the modified Rodriguez model is 3.89%.

Key words: two-phase flow, model, annular flow, flow pattern, drag reduction, prediction


基于自主搭建的水润滑稠油减阻环道系统,采用黏度比为1176、密度比为0.9的矿物油和自来水,系统研究了水平管中油表观流速(0.12~0.93 m/s)和水表观流速(0.04~1.54 m/s)对流型分布、摩擦压降以及减阻效果的影响;评价了Rodriguez、Brauner和Colombo压降模型的适用性;考虑油核偏心的影响,围绕混合黏度修正了精度最高的Rodriguez模型。结果表明:环状流是实验工况下的主要流型;含水率在0.04~0.93时,压力梯度总存在一个最小值,超过该值后均以抛物线形式递增;混合流速低于临界值会导致环状流/塞状流向分层流转变、压降骤增;油壁间完整水膜可有效润滑和减阻,最大压力折减系数高达73.1;给出了新的混合黏度计算式,修正后Rodriguez模型的平均相对误差为3.89%。

关键词: 两相流, 模型, 环状流, 流型, 减阻, 预测

CLC Number: