考虑滑脱效应和温度场的煤层气渗流数值模拟  

Numerical simulation of coal-bed methane seepage with the consideration of slip effect and temperature field

作　　者：肖晓春[1] 潘一山[1] 

机构地区：[1]辽宁工程技术大学力学系,辽宁阜新123000

出　　处：《中国地质灾害与防治学报》2006年第3期91-95,共5页The Chinese Journal of Geological Hazard and Control

基　　金：国家自然科学基金重大项目资助(50490275)

摘　　要：由于煤层气的解吸热效应,煤层气的运移过程是一个非等温过程。因此,温度场对煤层气渗流有着重要的影响。前人在研究煤层气渗流规律的研究中并没有同时考虑滑脱效应和温度场因素的影响,而在实际的深部开采中综合考虑滑脱效应和温度场的影响对研究深部煤层气运移规律有着重要的意义。因此本文建立了考虑滑脱效应及温度场的煤层气渗流数学模型,利用有限元数值方法研究了考虑滑脱效应和温度场耦合的煤层气运移规律;研究了考虑滑脱效应和温度场对压力场分布的影响;对考虑滑脱效应及温度场因素的煤层气产量进行了预测。得出了随着温度的升高煤储层的压力在降低,温度的升高对煤层气的产量有着负面的影响这一重要结论。Because of the coal-bed methane adsorption and de-sorption, the coal-bed methane seepage is an un-isothermal procession, it is influenced by the temperature field. Nobody considered the influence by slip effect and the temperature field at the same time in terms of coal-bed methane seepage, but it is important to study the law of coal-bed methane seepage synthetically with the consideration of the influence of the slip effect and the temperature field in actual coal-bed methane mining. This model considered the slip effect and the temperature field, the law of coal-bed methane seepage is analyzed considering both the slip effect and the temperature field through finite element method; distribution of pressure considering both the influence of the slip effect and the temperature field is defined, the output of coal-bed methane is predicted. The conclusion is that the stratum pressure would fall when the temperature increased, and the temperature field has a negative influence to coal-bed methane output.

关 键 词：滑脱效应 温度场 渗流场 储层压力 数值模拟 

分 类 号：P641.461[天文地球—地质矿产勘探]