作者：杨树坤1, 杨佩2, 李翔1, 郭宏峰1
作者单位：1. 中海油田服务股份有限公司油田生产事业部，天津 300459;
2. 西安石油大学电子工程学院，陕西 西安 710065
关键词：原油含水率;微波透射法;vivaldi天线;传输系数
摘要：
微波透射法原油含水率测量仪设计的关键点是微波传感器的小型化，即要求微波传感器的辐射口径面必须小于油管的内径。为解决这一技术难题，一种辐射口径面为70 mm×2 mm的 vivaldi天线被提出，由于该天线的2 mm厚度远小于油管内径，因此可应用于任意尺寸油管进行含水率测试，非常符合微波透射法含水率的测试需求。通过测试结果可以看出：所设计的vivaldi天线工作频带为2.5~8 ghz（工作带宽为110%）。将所设计的vivaldi天线应用于微波透射法原油含水率测量仪作为微波传感器，分析传输系数与含水率之间的变化关系。测试结果表明：vivaldi天线在0~100%范围内测试的绝对误差小于7%，而在10%~85%范围内绝对误差小于5%。该实验结果，为以后测量系统实现含水率的高精度测量和在线测量提供理论依据和实际参考。
design of vivaldi antenna based crude oil water content measuring instrument
yang shukun1, yang pei2, li xiang1, guo hongfeng1
1. oilfield production division, china oilfield services co., ltd., tianjin 300459, china;
2. school of electronic engineering, xi’an shiyou university, xi’an 710065, china
abstract: the key to the design of the microwave transmission method based crude oil water content measuring instrument is the miniaturization of the microwave sensor, where the radiation aperture surface of the microwave sensor must be smaller than the diameter of the oil tubing. in order to solve this technical problem, a vivaldi antenna with a radiating aperture of 70 mm×2 mm was proposed. since the 2 mm thickness of the antenna is much smaller than the tubing diameter, then it can be applied to any size tubing for water content testing, which is very suitable for the measurement requirements of the microwave transmission method based water content. it can be seen through measurement simulation that the working frequency band of the designed antenna is 2.5 - 8 ghz (working bandwidth of 110%). the designed vivaldi antenna is applied to the microwave-based crude oil water content measuring instrument as a microwave sensor for analyzing the relationship between the transmission coefficient and the water content. measurement results show that the absolute error of the vivaldi antenna is less than 7% in the range of 0-100%, and the absolute error is less than 5% in the range of 10%-85%. the measurement results provide a theoretical basis and practical reference for the future measurement system to achieve high-precision measurement and online measurement of water content.
keywords: crude oil water content;microwave transmission method;vivaldi antenna;transmission coefficient
2023, 49(2):144-152 收稿日期: 2021-09-13;收到修改稿日期: 2021-10-19
基金项目: 中海油服科技攻关项目（ysb19yf020）；中国博士后科学基金（2021m693890）
作者简介: 杨树坤(1986-),男,天津市人,工程师,硕士,主要从事油工艺技术方向的研究
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