摘要
为探究煤油资源重叠区废弃油井中地下水在煤层中的渗流特性及灾害防治方法,采用Comsol软件建立以双马矿内任意1个废弃油井为研究对象的几何模型。在不同温度、地下水动力黏度、地下水密度、煤层渗透率、孔隙率等条件下,废弃油井中水在煤层中的渗透速度、渗流范围及形状、渗流范围的压力有所不同。研究结果表明:废弃油井地下水在煤层中的渗流速度,随距离废弃油井的增加逐渐减小;随时间变化,煤层中地下水形成以油井为中心半径逐渐增大的近似于圆形的渗流形态,渗流范围在30年内形成半径约为280 m的圆形;废弃油井近处煤层受井内地下水水头影响大,远处煤体影响较小。
In order to explore the seepage characteristics of groundwater in the coal seam of abandoned oil well and the disaster prevention methods in the overlapping area of kerosene resources,this paper adopted Comsol Multiphysics software to establish a geometric model which randomly selected an abandoned oil well in Shuangma mine as the research object.Under the conditions of different temperature,groundwater dynamic viscosity,groundwater density,permeability and porosity of coal seam,the seepage velocity,shape and pressure of seepage range of water in abandoned oil wells in coal seam are different.The results show that the seepage velocity of groundwater from an abandoned oil well in a coal seam decreases with the increase of distance from the abandoned oil well.With the change of time,the groundwater in the coal seam formed a circular seepage form with the oil well as the centre radius gradually increasing,and the seepage range reached about 280 m circle area within 30 years.The coal seam near the abandoned oil well is greatly affected by the water head inside the well,while the coal body far away has little influence.The study of groundwater seepage characteristics in abandoned oil Wells based on numerical simulation can provide a reference for the study of formation mechanism,main control factors and prevention and control technology of water damage in abandoned oil wells.
作者
马智
胡秋萍
李阳
张学文
MA Zhi;HU Qiuping;LI Yang;ZHANG Xuewen(Ningxia Coal Industry Co.Ltd.CHN Energy,Yinchuan Ningxia 750011,China)
出处
《中国安全科学学报》
CAS
CSCD
北大核心
2022年第S02期100-105,共6页
China Safety Science Journal
关键词
废弃油井
地下水渗流
渗流特性
灾害防治
几何模型
abandoned oil well
groundwater seepage
seepage characteristics
disaster prevention and control
geometric model
