• 論文
主辦單位:煤炭科學研究總院有限公司、中國煤炭學會學術期刊工作委員會
長焰煤氣水相滲特征實驗研究
  • Title

    Experimental study on the permeability features of long flame gas water phase

  • 作者

    陳功輝唐明云甯江琪張海路

  • Author

    CHEN Gonghui;TANG Mingyun;NING Jiangqi;ZHANG Hailu

  • 單位

    安徽理工大學安全科學與工程學院深部煤礦采動響應與災害防控國家重點實驗室

  • Organization
    College of Safety Science and Engineering, Anhui University of Science and Technology
    State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology
  • 摘要
    長焰煤內部蘊藏大量煤層氣,隨著開采深度的不斷增加,需要對煤儲層中煤層氣與地下水之間的復雜滲流特性進行探索,以降低煤層氣開采難度、提高煤層氣開采效率。以內蒙古鄂爾多斯準格爾旗魏家峁礦區長焰煤為實驗對象,采用TCXS?Ⅱ型煤巖氣水相對滲透率測定儀進行長焰煤氣水相滲實驗,利用非穩態法得到不同有效應力、孔隙壓力和溫度作用下長焰煤在氣驅水過程中的氣水相滲特征,結果表明:① 當有效應力由3.7 MPa增大至7.7 MPa時,氣相相對滲透率上升幅度減小,而水相相對滲透率下降幅度略有增加;有效應力的增大會對流體的滲透能力產生抑制作用,且對水相滲流的抑制作用大于氣相滲流;殘余水飽和度隨著有效應力的增大而增大。② 當孔隙壓力由2 MPa增大至6 MPa時,水相相對滲透率曲線下降幅度變緩,氣相相對滲透率曲線上升幅度更加明顯,氣水共滲范圍變寬,等滲點飽和度增大,殘余水飽和度減小。③ 當溫度由20 ℃升高至80 ℃時,氣相相對滲透率增長幅度及水相相對滲透率下降幅度均逐漸變大,氣水共滲范圍變寬,殘余水飽和度呈下降趨勢,氣相滲流量呈增長趨勢。該研究結果可為長焰煤儲層水力壓裂和注熱開采等煤層氣開采技術研究提供理論依據和實驗參考。
  • Abstract
    There is a large amount of CBM in the long flame coal. With the continuous increase of mining depth, it is necessary to explore the complex permeability features between CBM and groundwater in the coal reservoir to reduce the difficulty of CBM mining and improve the efficiency of CBM mining. Taking the long flame coal in the Weijiamao mining area of Zhungeer Banner, Ordos, Inner Mongolia as the experimental object, the TCXS-II coal rock gas water relative permeability tester is used to conduct the long flame gas water phase permeability experiment. The non steady state method is used to obtain the gas water phase permeability features of long flame coal under different effective stresses, pore pressures, and temperatures during the gas water drive process. The results show the following points. ① When the effective stress increases from 3.7 MPa to 7.7 MPa, the increase in gas phase relative permeability decreases, while the decrease in water phase relative permeability slightly increases. The increase of effective stress will have an inhibitory effect on the permeability of the fluid, and the inhibitory effect on water phase seepage is greater than that on gas phase seepage. The residual water saturation increases with the increase of effective stress. ② When the pore pressure increases from 2 MPa to 6 MPa, the decrease in the relative permeability curve of the water phase slows down, and the increase in the relative permeability curve of the gas phase becomes more obvious. The range of gas water co-permeation becomes wider, the saturation of the isotonic point increases, and the residual water saturation decreases. ③ When the temperature rises from 20 ℃ to 80 ℃, the increase in gas phase relative permeability and the decrease in water phase relative permeability gradually increase. The range of gas water co-permeation becomes wider, the residual water saturation shows a decreasing trend, and the gas phase permeability flow rate shows an increasing trend. The research results can provide theoretical basis and experimental reference for the research of CBM extraction technologies such as hydraulic fracturing and thermal injection in long flame coal reservoirs.
  • 關鍵詞

    長焰煤氣水相滲相對滲透率有效應力孔隙壓力溫度殘余水飽和度

  • KeyWords

    long flame coal;gas water relative permeability;relative permeability;effective stress;pore pressure;temperature;residual water saturation

  • 基金項目(Foundation)
    國家自然科學基金項目(51774014)。
  • DOI
  • 引用格式
    陳功輝,唐明云,甯江琪,等. 長焰煤氣水相滲特征實驗研究[J]. 工礦自動化,2024,50(1):155-162.
  • Citation
    CHEN Gonghui, TANG Mingyun, NING Jiangqi, et al. Experimental study on the permeability features of long flame gas water phase[J]. Journal of Mine Automation,2024,50(1):155-162.
  • 圖表
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主辦單位:煤炭科學研究總院有限公司 中國煤炭學會學術期刊工作委員會

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