基于COMSOL Multi-physic的瓦斯抽采地面井的流场数值分析
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摘要
由于煤层气在煤岩体中的运移过程极其复杂,因此用来描述其流场的数学模型常常是高阶非线性的偏微分方程,为了能更好的解决此类问题,本文采用多重物理量数值模拟软件COMSOL Multi-physic对所建的Darcy-Brinkman模型进行了模拟求解的研究,结果表明用该软件模拟的压力和速度动态曲线更符合实际情况,而且可以用动态可视化模块来模拟压降过程。
The flow-field mathematical model is higher order nonlinear partial differential equations generally because of the complex process of coal seam gas flowing through seams. It was reported that the COMSOL Multi-physic, multiple physical quantities numerical simulation software, was used to solve this type of problem, based no COMSOL Multi-physic, the numerical result of Darcy-Brinkman model was calculated. The conclusion showed that the dynamic values of gas pressure and gas flow speed which were worked out by COMSOL Multi-physic were accorded with the actuality, and the gas pressure reducing process can be simulated well by Dynamic visual module in COMSOL Multi-physic.
The flow-field mathematical model is higher order nonlinear partial differential equations generally because of the complex process of coal seam gas flowing through seams. It was reported that the COMSOL Multi-physic, multiple physical quantities numerical simulation software, was used to solve this type of problem, based no COMSOL Multi-physic, the numerical result of Darcy-Brinkman model was calculated. The conclusion showed that the dynamic values of gas pressure and gas flow speed which were worked out by COMSOL Multi-physic were accorded with the actuality, and the gas pressure reducing process can be simulated well by Dynamic visual module in COMSOL Multi-physic.
引文
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[10]陈彝龙,邹云辉,钟勇林.采用瓦斯流场理论确定钻孔瓦斯抽采有效影响半径[J].江西煤炭科技,2009(3).
[2]刘泽功.开采煤层顶板抽放瓦斯流场分析[J].矿业安全与环保,2000,27((3).
[3]卢长生.垂直压裂井和水平井产气量的计算方法[J].中国煤层气,2006,3(4).
[4] Jamiolahmady, M.,et al.,Flow around a rock perforation surrounded by crushed zone:Experiments vs. theory[J]. JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,2006. 50(2).
[5] U. Shavit,R. Rosenzweig,and S. Assouline.Free flow at the interface of porous surfaces:A generalization of the Taylor Brush configuration[J].Transport in Porous Media,2003,54(3).
[6]麻翠杰,等.致密煤层气运移的数值模拟[J].大庆石油学院学报.2005,29(3).
[7]孙可明.低渗透煤层气开采与注气增产流固耦合理论及其应用[D].阜新:辽宁工程技术大学,2004.
[8]胡殿明,林柏泉等.煤层瓦斯赋存规律及防治技术[M].徐州:中国矿业大学出版社,2006.
[9]阙成龙,奕文云.Brinkman方程组对参数扰动的连续依赖性[J].长春工业大学学报(自然科学版),2006,27(2).
[10]陈彝龙,邹云辉,钟勇林.采用瓦斯流场理论确定钻孔瓦斯抽采有效影响半径[J].江西煤炭科技,2009(3).