Isothermal Transport (Core-Flow Type) of Heavy and Ultraviscous Oil in Curved Pipes: A Transient Study by CFD

• 作者: Adriana Barbosa da Costa Pereira Antonio Gilson Barbosa de Lima Bruno Ferreira Silva Endyara de Morais Cabral Francisco Alves Batista Hortência Luma Fernandes Magalhães Ricardo Soares Gomez Wanderson Magno Paiva Barbosa de Lima
• 来源期刊: 流体动力学(英文)
• 学科: 物理学
• 关键词: Core-Flow Simulation Two-Phase Flow CFD Ansys CFX
• 年，卷（期）: 2020,（2）
• 页码范围: 122-134
• 页数: 13页
• 分类号: O35

摘要

In the scenery of the oil industry, the remaining resources associated with light oils have an increasingly smaller share in the natural energy resources available to man, and in return the importance of resources associated with heavy oils has increased significantly. One of the drawbacks of this type of oil is associated with its low mobility due to the high viscosity in reservoir conditions, making the transport in pipelines very difficult, especially through pumping methods that require high powers. Thus, the development of new techniques and optimization of some existing technologies, aiming at the commercial use of heavy oil accumulations plays an important role. A viable technique that has been </span><span "="" style="line-height:1.5;">used is the core annular flow, in which small amounts of water are injected close to the pipe wall, lubricating the oil core, reducing friction and decreasing the pressure drop during the flow. In this sense, this work aims to perform, numerically, an energetic and hydrodynamic analysis of a heavy oil-water two-phase flow, using the core-flow technique, in curved pipes, in the Ansys CFX software. Results of the velocity, pressure, and volume fraction distribution of the involved phases are presented and analyzed. It was observed that the proposed mathematical model was able to accurately represent the analyzed phenomena and that a reduction factor in the pressure drop of 28.4 was obtained as compared to the heavy oil single-phase flow.