井下旋流雾化排水采气装置优化设计研究

发布时间：2018-10-29 08:56

【摘要】：伴随着气田开发的不断深入,生产过程中气井的产水及积液问题日益突出。有效的排水采气技术成为保障气田中后期合理高效开发的关键。井下旋流雾化排水采气是一项极具发展前景的新型排水采气工艺。本文通过理论研究与数值模拟相结合,对旋流雾化排水采气装置进行了优化设计,主要内容如下:(1)查阅相关文献,掌握现有排水采气工艺的技术特点以及旋流雾化技术在排液采气工艺中的应用现状和发展动态;(2)在了解垂直气井内气液两相流型的基本特性、转变条件以及临界携液流量模型的基础上,分析旋流雾化形成条件,构建相关数学模型,研究流体介质在旋流流场中的运移规律;(3)通过对旋流雾化排水采气装置的结构和工作原理分析,采用计算流体动力学(CFD)方法,主要针对多头旋流器的几何参数如旋流柱体直径、螺旋角、导程数等对雾化效果的影响开展分析研究,提出井下旋流雾化排水采气装置优化设计理论依据。(4)利用正交设计方法,选取以液滴颗粒分布特性为评价指标对多头旋流器的几何参数进行优选,得到最优参数组合,验证并分析优化旋流雾化排水采气装置在气井不同工况条件下的适应性。
[Abstract]:With the development of gas field, the problem of water production and fluid accumulation in gas wells is becoming more and more serious. Effective drainage gas production technology has become the key to ensure reasonable and efficient development of gas field in middle and late stage. Underground swirl atomization drainage gas production is a new drainage gas production process with great development prospects. In this paper, through the combination of theoretical research and numerical simulation, the optimal design of swirl atomization drainage gas recovery device is carried out. The main contents are as follows: (1) referring to relevant literature, Grasp the technical characteristics of the existing drainage gas recovery process and the application and development of swirl atomization technology in the drainage gas production process; (2) on the basis of understanding the basic characteristics of gas-liquid two-phase flow pattern in vertical gas wells, the transformation conditions and the critical liquid-carrying flow model, the formation conditions of swirl atomization are analyzed, and the relevant mathematical models are constructed. The migration law of fluid medium in swirl flow field is studied. (3) by analyzing the structure and working principle of swirl atomization drainage gas recovery device, using the (CFD) method of computational fluid dynamics, the geometric parameters of multi-head cyclone such as swirl cylinder diameter and helical angle are analyzed. The influence of lead number on atomization effect is analyzed and studied, and the theoretical basis for optimal design of downhole swirl atomization drainage gas recovery device is put forward. (4) orthogonal design method is used. The geometric parameters of multi-head hydrocyclone are selected as the evaluation index, and the optimal parameters combination is obtained to verify and analyze the adaptability of the optimized swirl atomization drainage gas recovery device under different conditions of gas well.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE93

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