基于光学探针的煤层气气泡形态井下实时探测装置  

Real-time CBM bubble detection device based on optical probe

作　　者：李锐[1] 熊杰[1] LI Rui;XIONG Jie(Electronics&Information School,Yangtze University,Jingzhou 434023,China)

机构地区：[1]长江大学电子信息学院

出　　处：《煤炭科学技术》2019年第12期250-254,共5页Coal Science and Technology

基　　金：国家自然科学基金资助项目(61273179)

摘　　要：针对目前常用的气泡探测装置不能满足煤层气井环空内气泡实时检测要求的问题,设计了一种基于光学探针的煤层气气泡形态井下实时探测装置。该装置以微处理器STM32为核心,利用光在空气与溶液中折射率的不同,获得表征不同介质的高低电平信号,计算煤层气气泡形态相关参数。该装置克服了以往气泡探测装置的不足,不论在目标检测的针对性还是速度方面,均能满足煤层气井环空内气泡实时检测的要求,有利于充分认识煤层气井下液体参数变化特征和研究气藏及井筒气液两相流动规律。探测装置模拟试验结果表明,该探测装置速度响应快、计算精度高,能满足实际项目工程需求。According to the current problem that bubble detection device commonly used in CBM well cannot meet the requirements for real-time detection,a down hole real-time detection device for CBM bubble is designed based on optical probe to solve this problem.The core processing component of this device is microprocessor STM32.As the refractive index of light in the air and liquor are different,this device can generate high level or low level signals representing different mediums,then calculate relevant parameters of gas bubble from CBM.This device overcomes shortcomings of conventional bubble detection devices.In terms of both target pertinence and speed of detection,it meets requirements of real-time detection of gas bubbles in CBM wells,and can be used to fully understand characteristics of fluid parameters variation and gas-liquid two-phase in reservoir and wellbore.The simulation test results of detection device show that detection device has fast response speed and high calculation accuracy,and can meet the engineering requirements of actual project.

关 键 词：气液二相流 光纤探针 煤层气 探测装置 

分 类 号：TD712[矿业工程—矿井通风与安全] TD67