高气油比井组凝析油排放工艺改进及应用

Improvement and application of condensate oil discharge technology in high gas-oil ratio production well groups

在紧密结合现场实际的基础上,从功能、结构、流程3个方面提出了一种同时具备加药、分液、排液功能的分液包改进工艺,形成了4种不同的工艺模式。为了对比分离效率,采用DPM模型对液滴直径、凝析油量、生产气量进行了数值模拟分析,结果表明,改进的分液包具有更好的效果。又从井组试验和区块应用2个方面分析说明了改进方案的实际效果,改进后能够分离出更多的凝析油,日均外排放降低5.3 L,平均排放次数降低了2次/d,减轻了工作量,实现了伴生气凝析油的密闭集输,降低了安全风险,同时在材料选取和制作上兼具了良好的经济性能。

Based on actual problems on spot,an improved technology for liquid separation bag with integration functions of dosing,skimming and liquid drainage is proposed from three considerations of function,structure and routine,which develops four models to deal with condensate oil. In order to compare the separation efficiency of the improved liquid separate bag with that of conventional one,the DPM model is employed to carry out numerical simulation analysis with respect to droplet diameter,condensate oil content and gas generation volumes.The results suggest that the improved liquid separation bag has better separation efficiency. Furthermore,the practical effect from improve technology is illustrated from two aspects of well group experiments and applications in seven blocks. More condensate oil can be separated by the improved technology,while the emissions drops to about 5. 3 L per day on average and the average emission times decreases by 2 times per day to ease off workers＇ load.The improved technology can help to achieve the close gathering transportation of condense oil from associated gas,which reduces risk. Besides,it is economical and beneficial in the aspects of materials selection and preparation.