【作者】 张少波； 沈新普；

【Author】 ZHANG Shao-bo;SHEN Xin-pu;North China University of Technology;Shenyang University of Technology;

【机构】 北方工业大学； 沈阳工业大学；

【摘要】 简要介绍了石油生产过程中产砂分析及最佳采油压力降选择的数值计算原理、流程,并给出了一个应用实例。针对基于塑性的产砂分析模型,分析了相关的建模过程中遇到的两个主要问题:倾斜井孔相关模型中应力及变形对称特性的保障,压力降引起的塑性应变与总的塑性应变的关系。文章提出了相应的解决措施和需要注意的细节,并讨论了射孔完井相关模型中双重应力集中现象,同时对有关的塑性力学概念和力学量进行了简要阐述和使用分析。更多还原

【Abstract】 This paper briefly introduces the numerical scheme, flowchart on analysis of sanding risk and calculation of optimized draw-down pressure in oil production. An application example of sanding prediction is presented with details of numerical modeling and analysis. With the plasticity-based numerical model, two important problems met in the process of numerical analysis of optimized draw-down pressure have been addressed: the way to ensure the symmetry of numerical model for inclined wellbore trajectory, relationship of the plastic strain caused by pressure draw-down and the amount of total plastic strain. Measures of overcoming these problems are introduced. Some concepts of plasticity used in this numerical scheme are discussed.更多还原