低压低产气井涡流工具优化设计研究
[Abstract]:When the gas production rate of low pressure and low production gas wells is lower than the critical liquid carrying flow rate, the accumulation of fluid in gas wells has seriously affected the continuous and stable production of gas wells. Eddy current drainage gas recovery process is a new technology used in low pressure and low production gas wells. This paper optimizes the design of eddy current tools by combining theoretical and experimental studies. The main research contents are as follows: (1) investigating the conventional drainage gas production technology used in gas wells and eddy current drainage gas recovery technology at home and abroad, collecting the data of low pressure and low production gas wells in various blocks of Changqing Oilfield. The operating condition parameters such as gas production and moisture content were obtained. (2) by analyzing the working principle of eddy current drainage and gas recovery, the structure of eddy current tool is designed, the mechanism of gas-liquid two-phase eddy current drainage gas recovery is studied, and the total swirl continuous distance after loading eddy current tool in pipe string system is calculated. (3) the mathematical model of eddy current tool is established by Solid Edge software, and the mesh is divided into GAMBIT. The distribution law of liquid phase volume fraction is obtained by using FLUENT software to simulate the eddy current tool after loading tubing. Axial velocity distribution and swirl flow; (4) the orthogonal test method is used to make the orthogonal table of the structure dimension factors of the eddy current tool, and the optimum structure dimension parameter is optimized and the combination of the optimum structure dimension is obtained. (5) six groups of eddy current tools selected by theoretical analysis are used in the indoor experiment of eddy current drainage and gas recovery. The results of numerical simulation and indoor experiment are analyzed, the consistency between theoretical analysis and indoor experiment is verified, and two groups of eddy current tools are selected.
【学位授予单位】:西安石油大学
【学位级别】:硕士
【学位授予年份】:2015
【分类号】:TE934
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