摘要
利用传统电导法测量气液两相流持液率时,测量精度和测量范围往往要受到流型和矿化度的影响。为此,提出一种在强制环状流状态下,利用往复式动态电导探针测量持液率的方法。测量装置由旋流器、电导探针、探针自动往复移动装置和数据采集处理系统等组成。该测量方法一方面将流型调整为强制环状流,使测量结果不受复杂多变的气液流型的影响;另一方面,仅根据电路的通断来确定液膜厚度,而不依赖具体的电导率大小,因此可以克服矿化度对测量结果的影响。通过数值模拟研究,标定了动态电导传感器对液膜进行测量的位置位于旋流器下游约6D处,其中D为测量管段内径;通过室内实验验证了装置的可行性,结果表明:在气相表观流速为5~20 m/s,液相表观流速为0.079~0.48 m/s的实验参数范围内,持液率最大偏差为10.45%。
Traditional conductivity method for measuring the liquid-holding of gas-liquid two-phase flow is often affected by the flow pattern and salinity,resulting in reduced measurement accuracy and range.To overcome these limitations,a method for measuring liquid holdup using a reciprocating dynamic conductivity probe under forced annular flow conditions has been proposed.The measurement device consists of a cyclone,conductivity probe,automatic probe reciprocating system,and data acquisition and processing system.On the one hand,this measurement method adjusts the flow pattern to a forced annular flow,so that the measurement results are not affected by the complex and variable gas-liquid flow patterns.On the other hand,the thickness of the liquid film is determined solely based on the circuit's on-off,without relying on the specific conductivity,thus overcoming the influence of mineralization on the measurement results.Numerical simulations were used to determine that the dynamic conductivity sensor should be located approximately 6D downstream of the swirl generator for measuring the liquid film,in which D is the measurement of the inner diameter of the pipe section.Laboratory experiments were conducted to verify the feasibility of the device,and the results show that within the experimental parameter range of gas phase superficial velocities of 5~20 m/s and liquid phase superficial velocities of 0.079~0.48 m/s,the maximum deviation of liquid holdup is 10.45%.
作者
吴慧雄
张兴凯
李仲豪
廖锐全
WU Hui-xiong;ZHANG Xing-kai;LI Zhong-hao;LIAO Rui-quan(School of Petroleum Engineering,Yangtze University,Wuhan 430100,China;Multiphase Flow Research Laboratory of Gas Test Verification Base of China National Petroleum Group Corporation,Wuhan 430100,China;Hubei Key Laboratory of Oil and Gas Drilling and Production Engineering,Wuhan 430100,China;Research Institute of Oil Production Technology,Dagang Oilfield Company,PetroChina,Tianjin 300280,China)
出处
《科学技术与工程》
北大核心
2023年第29期12513-12522,共10页
Science Technology and Engineering
基金
国家自然科学基金(62173049)
油气钻采工程湖北省重点实验室开放基金(YQZC202309)。
关键词
强制环状流
旋流器
动态测量
液膜厚度
数值模拟
多相流
forced annular flow
cyclone
dynamic measurement
liquid film thickness
numerical simulation
multiphase flow
