原油储罐罐底腐蚀缺陷最佳补板形状研究

Study on the Best Shape of Crude Oil Storage Tank Bottom Corrosion Defect Patching Plate

张贵霖 李卓远 吴玉国 王丹 王孝磊

Guilin ZHANG Zhuoyuan LI Yuguo WU Dan WANG Xiaolei WANG

辽宁石油化工大学 石油天然气工程学院，辽宁 抚顺 113001 管网集团（徐州）管道检验检测有限公司，江苏 徐州 221000 辽河油田庆阳勘探开发分公司，甘肃 庆阳 745000

College of Petroleum Engineering，Liaoning Petrochemical University，Fushun Liaoning 113001，China Pipe Network Group （Xuzhou） Pipeline Inspection and Testing Co. ，Ltd. ，Xuzhou Jiangsu 221000，China Qingyang Exploration and Development Branch of Liaohe Oilfield，Qingyang Gansu 745000，China

为了确定合理的原油储罐罐底腐蚀缺陷的补板形状，利用有限元分析法分析了不同补板形状修补后腐蚀缺陷应力变化情况，并对所用补板的应力分布以及安全系数进行探究，得出了辽河油田2万m3原油储罐罐底的最佳补板形状。结果表明，原油储罐罐底最佳补板形状为圆形补板，对腐蚀缺陷进行修补后，腐蚀缺陷应力随补板半径的增大而减小，不会随腐蚀缺陷深度、半径的变化而变化；随着补板半径的增加，补板的费用和安全性增加，具体补板大小应按照工程实际情况制定。研究结果可以从科学角度对罐底修补给予理论指导。

In order to determine the reasonable shape of the patching plate for the corrosion defects in the bottom of crude oil storage tank, this paper used finite element analysis to calculate the changes of the stress value in the corrosion defects after repairing different patching plate shapes, and then investigated the stress distribution and the safety factor value of the patching plate, and finally gave the best shape of the patching plate for the bottom of 20 000 m3 crude oil storage tank in Liaohe oil field. The results show that the best shape of the patching plate is a round patching plate. After repairing the corrosion defect, the stress value in the corrosion defect only decreases with the increase of the radius of the patching plate after the repair of the corrosion defect, and does not change with the change of the depth and radius of the defect. With the increase of the radius of the patch plate, the cost and safety of the patch plate will also increase, the specific size of the patch plate should be developed in accordance with the actual situation of the project. The results of the study can give theoretical guidance to the tank bottom repair from a scientific point of view.

辽宁省教育厅科学研究面上项目(LJKZ0395)

10.12422/j.issn.1672-6952.2023.05.008