摘要
根据煤层气藏的特点,利用渗透率平行路径模型和煤层气渗流控制方程推导稳态情形时煤层气直井产量公式。结果表明,对于不同的非堵塞路径占总孔隙路径的百分比,煤粉产出时煤层渗透率和煤层气直井产量有可能增大,也有可能减小。实例计算结果与实际生产资料一致,证明了该方法的可靠性。
On the basis of coalbed methane reservoir characteristic, equation of coalbed output from vertical shaft was deduced by applying permeability parallel path model and seepage control equations. Results showed that for different percentages of unlocked path over global pore path, coal-seam permeability and CBM output from vertical shaft would increase and also would decrease. Calculation result met actual data, which proved the method reliable.
出处
《煤矿开采》
北大核心
2013年第1期104-106,共3页
Coal Mining Technology
基金
国家科技重大专项煤层气排采工艺与数值模拟技术项目:煤层气井生产动态变化特征和监测技术(2009ZX05038)
非常规天然气能源地质评价与开发工程北京市重点实验室2012年阶梯计划项目(Z121109002812011)
关键词
煤粉
渗透率
煤层气直井产量
coal ash
permeability
CBM output from vertical shaft
