摘要
针对目前高含硫湿气集输管线中积液严重的现状,对气-固界面和液-固界面的超声回波特性进行了研究,提出了一种非介入式管线积液检测方法,通过数值模拟可准确实现定量分析。超声波在气-固界面和液-固界面的超声回波特性差异明显,随着反射回波次数的增大,两种界面回波特性差异越来越显著,选取第5次回波信号作为界面特性判断依据。实验表明:利用超声波可以准确地检测到管线内的气-液界面,测量精度可达±3 mm;该检测方法应用简单、不破坏管道结构,不受管内温度、压力的影响,检测结果准确可靠,可为工艺运行和管线清管提供依据。
A non-intrusive detection method was proposed for the liquid-loading diagnosis in wet-gas pipelines, with which an accu rarely quantitative analysis could be conducted through numerical simulation. Since ultrasonic penetration at a liquid-solid interface is higher than a gas-solid one, a faster attenuation of residual ultrasonic waves inside a pipeline wall will occur. Thus, a difference in ultrasonic echo characteristics between the case of the gas-solid interface and that of the liquid-solid interface is evident. Moreover, a long with the echoing frequency increases, the difference between them becomes more obvious. Based on this point of view, the fifth echo signal was selected as a basis to analyze characteristics of gas-solid o~ liquid-solid interfaces. The experimental investigation was carried out to detect the liquid loading of wet-gas transportation pipelines in the Puguang gasfield and the results showed that a gas liquid interface can be detected accurately with the measurement precision of ±3 mm, which agrees fairly well with the actual liquid loading. Therefore, this method proved simple and high in accuracy and reliability besides being free of the damage to pipeline structures and unaffected by temperature and pressure of pipelines.
出处
《石油学报》
EI
CAS
CSCD
北大核心
2013年第6期1200-1205,共6页
Acta Petrolei Sinica
基金
国家重大科技专项(2011ZX05017-004)
国家自然科学基金项目(No.51006123)
山东省自然科学基金项目(ZR2010EQ016)资助
关键词
集输管线
超声回波
气-液界面
检测技术
管线清管
gathering pipeline
ultrasonic echo
gas-liquid interface
detection technology
pipeline pigging
