摘要
采用实验方法,研究煤层气的渗流特征,包括有效覆压、气体压力、气体性质、温度等因素对煤层气渗透能力的影响,比较了甲烷在煤层试样、砂岩试样和煤粉试样中渗流性能的差异。研究表明,煤层试样的渗透率受有效覆压的影响很大,其应力敏感性程度超过砂岩岩样。模拟实验表明在煤层气开采过程中,试样渗透率能保持在原始渗透率的70％以上;温度升高,渗透能力提高。
Characteristics of the CBM seepage in coalbed core are studied by experiments, with the impact of factors such as effective press, gas pressure, gas properties and temperature on the CBM permeability investigated. The comparison is made on the seepages of methane in coalbed core, sandstone core and coal powder core. The research indicates that the permeability of coalbed core is greatly affected by the effective press, and its press sensitivity exceeds that of the sandstone core. The simulation shows that in the process of CBM exploitation , the permeability can keep above 70 percents of original permeability, and the flow in coalbed core will be enhanced with the temperature going up.
出处
《中国煤层气》
2005年第1期36-39,共4页
China Coalbed Methane
基金
国家973计划"中国煤层气成藏机制及经济开发基础研究"(2002CB2117)项目。
