Study on Near-Infrared Absorption Characteristics of Horizontal
Gas-Liquid Two-Phase Flow of Methane and Water
KONG Wei-hang1, 2, ZHANG Heng-heng1, LI Pei-yu1, LI Yang3, HUI Yao-zhi1, LI He1, 2*
1. School of Information Science and Engineering, Yanshan University, Qinhuangdao 066004, China
2. Hebei Key Laboratory of Computer Virtual Technology and System Integration, Qinhuangdao 066004, China
3. Reservoir Dynamic Monitoring Center, Shengli Oilfield Company, SINOPEC, Dongying 257000, China
Abstract：The phase holdup of gas-liquid two-phase flow in shale gas horizontal wells is an important parameter for calculating phase separation velocity, pressure drop, average density，and gas production. To solve the problem of gas-liquid two-phase flow phase holdup measurement in shale gas horizontal wells, this paper studies the absorption characteristics of horizontal gas-liquid two-phase flow based on near-infrared spectroscopy. Firstly, according to the full-band absorption spectra of methane and water obtained from HITRAN and Refractiveindex databases, the characteristic absorption peak ranges of methane and water are analyzed. Then, the near-infrared spectra of methane and water with different liquid surface thicknesses under different pressures are obtained experimentally. The position and variation range of the absorption peaks are analyzed, and the absorption characteristic wavelengths of methane and water are finally determined to be 1 650 and 980 nm, respectively. Finally, the experimental platform of horizontal tube section with 1 650 and 980 nm wavelength lasers was built to analyze the effects of different pressures, gas-liquid ratios, organic matter and total dissolved solids in the flowback fluid on the near-infrared absorption performance. The experimental results show that the 980 nm near-infrared light intensity is only affected by the liquid level height, and the logarithm of the near-infrared light intensity at the receiving end decreases linearly with the increase of the liquid level height. The near-infrared light intensity at 1 650 nm is affected by the height of the water level and the pressure of the methane gas, and as the height of the liquid level increases and the pressure increases, the logarithm of the near-infrared light intensity at the receiving end decreases linearly. The effect of total dissolved solids in the flowback fluid on the near-infrared light transmittance is slightly greater than that of organic matter. Increasing the concentration of organic matter and total dissolved solids, the effect on the near-infrared light intensity is less than 6%. Therefore, 980 nm near-infrared light can be used to measure the change in water level, and 1 650 nm near-infrared light can be used to measure the change in water and methane pressure. Then, according to Lambert-Beer and linear superposition law, the phase holdup of gas-liquid two-phase flow in shale gas horizontal wells can be obtained.
孔维航，张恒恒，李佩宇，李 洋，回耀智，李 贺. 甲烷和水的水平气液两相流近红外吸收特性分析[J]. 光谱学与光谱分析, 2025, 45(06): 1551-1556.
KONG Wei-hang, ZHANG Heng-heng, LI Pei-yu, LI Yang, HUI Yao-zhi, LI He. Study on Near-Infrared Absorption Characteristics of Horizontal
Gas-Liquid Two-Phase Flow of Methane and Water. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2025, 45(06): 1551-1556.
[1] Feng D, Chen Z X, Wu K L, et al. The Canadian Journal of Chemical Engineering, 2022, 100(11): 3084.
[2] Gou L, Yang Z, Min C, et al. Applied Energy, 2024, 371: 123673.
[3] BAO Yong, DONG Feng, TAN Chao(鲍 勇, 董 峰, 谭 超). Journal of Engineering Thermophysics(工程热物理学报), 2023, 44(6): 1583.
[4] Jeshvaghani, P A, Khorsandi M, Panahi R. Flow Measurement and Instrumentation, 2022, 86: 102190.
[5] Shi X W, Tan C, Dong F, et al. IEEE Sensors Journal, 2021, 21(11): 12913.
[6] CHEN Yang-zheng, WANG Xiao-xin, WANG Bo, et al(陈阳正, 王小鑫, 王 博, 等). Instrument Technique and Sensor(仪表技术与传感器), 2020, (2): 114.
[7] FANG Li-de, LIANG Yu-jiao, LI Xiao-ting, et al(方立德, 梁玉娇, 李小亭, 等). Journal of Electronic Measurement and Instrumentation(电子测量与仪器学报), 2014, 28(5): 528.
[8] FANG Li-de, ZHANG Zhen-yu, XU Xiao-xiao, et al(方立德, 张真玉, 徐潇潇, 等). Chinese Journal of Scientific Instrument(仪器仪表学报), 2021, 42(12): 236.
[9] FANG Li-de, WANG Shao-chong, WANG Pei-pei, et al(方立德, 王少冲, 王配配, 等). Acta Metrologica Sinica (计量学报), 2019, 40(6): 1043.
[10] Mithran N, Venkatesan M. Chemical Engineering Communications, 2021, 208(6): 870.
[11] KAN Ling-ling, ZHU Fu-hai, LIANG Hong-wei(阚玲玲，朱富海，梁洪卫). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2024, 44(3): 829.
[12] LI Jun-hao, ZHENG Kai-yuan, XI Zhen-hai, et al(李俊豪, 郑凯元, 席振海, 等). Chinese Journal of Lasers(中国激光), 2021, 48(16): 1610002.
[13] WANG Qian-jin, SUN Peng-shuai, ZHANG Zhi-rong, et al(王前进, 孙鹏帅, 张志荣, 等). Chinese Journal of Lasers(中国激光), 2024, 51(8): 0811004.
[14] SONG Zhi-yi, ZENG Xiang-ying, ZHANG Biao, et al(宋之怡, 曾祥英, 张 彪, 等). Natural Gas Geoscience(天然气地球科学), 2024, 35(4): 718.
[15] Tan B, He Z M, Fang Y C, et al. Science of the Total Environment，2023, 883: 163478.
