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首页> 美国卫生研究院文献>Sensors (Basel, Switzerland) >The Development of a Gas–Liquid Two-Phase Flow Sensor Applicable to CBM Wellbore Annulus
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The Development of a Gas–Liquid Two-Phase Flow Sensor Applicable to CBM Wellbore Annulus

机译：适用于煤层气井筒环空的气液两相流量传感器的开发

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摘要

The measurement of wellbore annulus gas–liquid two-phase flow in CBM (coalbed methane) wells is of great significance for reasonably developing gas drainage and extraction processes, estimating CBM output, judging the operating conditions of CBM wells and analyzing stratum conditions. Hence, a specially designed sensor is urgently needed for real-time measurement of gas–liquid two-phase flow in CBM wellbore annulus. Existing flow sensors fail to meet the requirements of the operating conditions of CBM wellbore annulus due to such factors as an inapplicable measurement principle, larger size, poor sealability, high installation accuracy, and higher requirements for fluid media. Therefore, based on the principle of a target flowmeter, this paper designs a new two-phase flow sensor that can identify and automatically calibrate different flow patterns of two-phase flows. Upon the successful development of the new flow sensor, lab and field tests were carried out, and the results show that the newly designed sensor, with a measurement accuracy of ±2.5%, can adapt to the operating conditions of CBM wells and is reliable for long-term work.
机译：对煤层气（煤层气）井的井眼环空气液两相流的测量，对于合理发展瓦斯抽采工艺，估算煤层气产量，判断煤层气井的运行条件和分析地层条件具有重要意义。因此，迫切需要一种专门设计的传感器来实时测量煤层气井眼环空中的气液两相流。现有的流量传感器由于测量原理不适用，尺寸较大，密封性差，安装精度高以及对流体介质的要求较高等因素而不能满足煤层气井筒环空条件的要求。因此，基于目标流量计的原理，本文设计了一种新型的两相流传感器，该传感器可以识别并自动校准两相流的不同流型。在成功开发了新型流量传感器后，进行了实验室和现场测试，结果表明，新设计的传感器的测量精度为±2.5％，可以适应煤层气井的工作条件，并且对以下设备可靠。长期的工作。

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