计算流体动力学耦合离散单元法在支撑剂方面的应用进展

Progress in the Application of the Computational Fluid Dynamics-Discrete Element Method in Proppant

非常规致密/页岩储层开发问题中,支撑剂运移规律具有重要影响。明确支撑剂在裂缝中的运移规律对压裂作业十分关键。CFD-DEM模拟技术针对流体-颗粒系统具备高解析度,为支撑剂的运移、分布研究提供了有效方法。介绍了此模拟方法在支撑剂运移研究中的最新进展,深度分析了CFD-DEM模拟方法在支撑剂运移规律研究中的独特优势与CFD-DEM模型的原理和特点,总结了支撑剂在不同环境条件下的运移特征和分布规律,更全面、准确地揭示支撑剂运移的复杂机制,推动非常规油气开采朝着更加科学、高效、可持续的方向发展。

In the development of unconventional tight/shale reservoirs,the migration law of proppant has an im⁃portant impact,so it is critical for fracturing operations to clarify the migration law of proppant in fractures.CFDDEM(Computational Fluid Dynamics-Discrete Element Method)simulation technology has high resolution for the fluid-particle system,which provides an effective method for studying the migration and distribution of prop⁃pant.This article reviews the latest progress of this simulation method in the study of the migration of proppant,makes an in-depth analysis of its unique advantages in the study of the migration law of proppant,analyzes the prin⁃ciples and characteristics of the CFD-DEM model,and summarizes the migration characteristics and distribution laws of proppant under different environmental conditions,so as to reveal the complex mechanism of the migration of proppant more comprehensively and accurately,and promote the development of unconventional oil and gas ex⁃ploitation in a more scientific,efficient and sustainable direction.