In order to meet the requirements of comprehensive performance of completion fluids for high-temperature and low-permeability gas field completion operations and improve completion efficiency,based on the analysis of the basic situation of the target gas field,a low tension and high-temperature resistant organic salt completion fluid system suitable for high-temperature and low-permeability gas fields was studied,with waterproof locking agent F-2 and corrosion inhibitor HSJ-H as the main treatment agents,and its comprehensive performance was evaluated.The results show that the low tension and high temperature resistant organic salt completion fluid has good anti swelling performance,and can achieve an anti-swelling rate of over 90％in the temperature range of 50～170 ℃.The completion fluid system has good surface/interfacial activity,and even after high-temperature aging,the completion fluid can still have lower surface tension(19.7 mN/m)and interfacial tension(0.98 mN/m).In addition,the completion fluid system also has good high-temperature and anti-corrosion performance.When the experimental temperature reaches 170 ℃,the corrosion rate of the completion fluid on S13Cr steel sheets is still as low as 0.050 4 mm/a.The research results suggest that low tension and high temperature resistant organic salt completion fluids can meet the requirements of target gas field completion operations.
关键词
海上气田/有机盐完井液/低张力/抗高温/腐蚀性能
Key words
offshore gas fields/organic salt completion fluid/low tension/high temperature resistance/corrosion performance
维普
万方数据