摘要：Owing to the limitations of physical experiments on heavy oil, this study establishes a mathematical model for heavy oil-water two-phase flow based on the theory of multiphase flow, considering factors such as heavy oil viscosity, mixed flow velocity, and inlet water cut. Through transient calculations of 650 groups of heavy oil-water two-phase flows based on this model, six typical heavy oil-water two-phase flow patterns were identified by monitoring flow pattern cloud images, liquid holdup, and the probability density function (PDF) of liquid holdup: water-in-oil bubble flow, transitional flow, water-in-oil slug flow, oil-in-water bubble flow, oil-in-water very fine dispersed flow, and water-in-oil core-annular flow. Five sets of flow pattern maps for a heavy oil-water two-phase flow with different viscosities were established based on the inlet water cut and mixed flow velocity. The results showed that different heavy oil viscosities lead to different oil-water two-phase flow patterns. When the heavy oil viscosity is 100 mPas, the flow patterns include water-in-oil bubble flow, transitional flow, water-in-oil slug flow, oil-in-water bubble flow, and oil-in-water very fine dispersed bubble flow. When the heavy oil viscosity reaches 600 mPas, a water-in-oil core-annular flow appears, and the oil-in-water very fine dispersed bubble flow disappears. After the heavy oil viscosity exceeds 1100 mPas, the oil-in-water bubble flow disappears. Among the different flow patterns, the range of the water-in-oil slug flow is most affected by the viscosity and flow velocity. The greater the heavy oil viscosity, the larger the range. When the viscosity remained constant, a larger flow velocity resulted in a smaller range. The accuracy of the flow pattern predictions in the maps was verified by comparing them with field production data, confirming that the research results can provide a theoretical basis for understanding oil-water two-phase flow patterns in heavy oil wellbores.

关键字：heavy oil; flow pattern identification; flow pattern map; oil-water two-phase flow

ISSN号：2227-9717

卷、期、页：卷12期11

发表日期：2024-11-01

影响因子：0.000000

期刊分区（SCI为中科院分区）：四区

收录情况：SCI（科学引文索引印刷版）,SCIE（科学引文索引网络版）

发表期刊名称：PROCESSES

参与作者：Ren, Zongxiao,Su, Hongtong,Jia, Shuaihu,Cheng, Ting,Li, Mingyu,Liang, Jian

通讯作者：宋正聪

第一作者：韩国庆

论文类型：期刊论文

论文概要：宋正聪,韩国庆,Ren, Zongxiao,Su, Hongtong,Jia, Shuaihu,Cheng, Ting,Li, Mingyu,Liang, Jian，Research on Oil-Water Two-Phase Flow Patterns in Wellbore of Heavy Oil Wells with Medium-High Water Cut，PROCESSES，2024，卷12期11

论文题目：Research on Oil-Water Two-Phase Flow Patterns in Wellbore of Heavy Oil Wells with Medium-High Water Cut