摘要
利用无损检测技术最大程度地发现管道中的安全隐患是保障石油天然气运输安全的有效途径。本文利用COMSOL软件进行建模,实现了基于感应测井线圈系探测石油管道金属缺陷的新方法的数值模拟,研究了缺陷大小及材料变化对视电导率实部的影响,单缺陷大小变化及双缺陷间距变化对线圈系测量的影响,分析归纳了线圈系响应特征与线圈系结构和缺陷的相对位置关系,总结出探测缺陷大小、位置和间距的计算公式,并对双线圈系和三线圈系进行幅值比较,结果表明三线圈系探测新方法明显优于双线圈系,且新方法可探测缺陷深度0.01 cm,优于现有的探测石油管道缺陷方法。通过计算绘制双线圈系及三线圈系归一化涡流图,分析响应特征与涡流和缺陷之间的相互关系,揭示了特征出现的机理。
It is an effective way to ensure the safety of oil and gas transportation to find the potential safety hazards in the pipeline to the greatest extent using nondestructive testing technology.The numerical simulation of a new method for detecting metal defects in oil pipeline based on induction logging coil system is realized by using COMSOL software.The effects of defect size and pipeline material on the real part of apparent conductivity,and the effects of single defect size and double defect spacing on the measurement result of coil system are studied.The relationships between the response characteristics of the coil systems and the structure of coil system and the relative position of defects are analyzed and summarized,and the calculation formulas of the size,position and spacing of the detected defects are summarized.The response amplitudes of double coil system and three coil system are compared,and the result shows that the new detection method of three coil system is obviously better than that of double coil system.The new method can detect the defect depth of 0.01 cm,which is better than the existing methods for detecting oil pipeline defects.By calculating and drawing the normalized eddy current diagrams of double coil system and three coil system,the relationship between response characteristics and eddy current and defects is analyzed,and the mechanism of response characteristics is revealed.
作者
仵杰
李野
WU Jie;LI Ye(College of Electronic Engineering,Xi’ an Shiyou University,Xi’ an,Shaanxi 710065,China;Key Laboratory of Shaanxi Province for Measurement and Control Technology of Oil and Gas Wells,Xi’ an,Shaanxi 710065,China)
出处
《西安石油大学学报（自然科学版）》
北大核心
2021年第5期121-128,共8页
Journal of Xi’an Shiyou University（Natural Science Edition）
基金
国家重大科研仪器研制项目(11927801)
西安石油大学研究生创新与实践能力培养项目(YCS19213088)。
