真三轴应力下注高温蒸汽加热冷却后无烟煤渗透性演化试验  

Experimental Study on Permeability Evolution of Anthracite After Steam Heating Under True Triaxial Stress

作　　者：石晓巅 Shi Xiaodian(School of Mines,Shanxi Open University,Taiyuan 030027,Shanxi,China)

机构地区：[1]山西开放大学矿业学院,山西太原030027

出　　处：《绿色科技》2025年第4期247-254,共8页Journal of Green Science and Technology

基　　金：山西省应用基础研究计划项目(编号:20210302124136);山西省现代远程教育学会一般项目(编号:SXYJ202405)。

摘　　要：在注高温蒸汽强化开采煤层气的工程实践中,高温蒸汽从注热井进入煤体中,注热井周边以及预制裂隙面附近的煤体率先受到高温蒸汽的作用,且在整个工程实践周期中,受热范围不断增加。煤体在热量以及高温水汽分子的作用下,渗透性发生变化,对高温蒸汽和煤层气在煤体中的渗流运移产生重要的影响。为了研究注高温蒸汽对无烟煤渗透性的影响规律,利用实验室搭建的实验设备,对真三轴应力下注蒸汽加热冷却后无烟煤渗透性演化规律进行研究,分析不同温度蒸汽加热后的煤体渗透性的变化以及相同温度蒸汽加热不同时长对煤体渗透性的影响。试验研究结果有利于进一步认识注高温蒸汽增产煤层气过程中煤体渗透性的演化规律。In the engineering practice of hot steam injection to enhance coalbed methane production,high-temperature steam enters the coal body from the hot injection well.The coal body around the hot injection well and near the prefabricated fracture surface is first affected by the hot steam,and the heating range continues to increase during the entire engineering practice cycle.Under the action of heat and high-temperature water vapor molecules,the permeability of the coal body changes,which has an important impact on the seepage and migration of hot steam and gas in the coal body.In order to study the influence of hot steam injection on the permeability of anthracite,the experimental equipment built in the laboratory was used to study the permeability evolution law of anthracite after steam injection under true triaxial stress,and the changes in the permeability of the coal body after steam heating at different temperatures and the influence of different durations of steam heating at the same temperature on the permeability of the coal body were analyzed.The experimental research results are conducive to further understanding the evolution law of coal permeability in the process of hot steam injection to increase coalbed methane production.

关 键 词：煤层气 注高温蒸汽强化开采 渗透率 

分 类 号：TQ177.1[化学工程—硅酸盐工业]