基于COMET3软件的煤储层数值模拟方法

煤储层数值模拟技术是进行产能预测、地面开发前景评价和生产工艺优选等的重要手段。基于煤储层数值模拟软件的发展历史,阐述了运用第三代专用软件（COMET3）进行煤储层数值模拟的主要步骤,通过实例展示了煤储层排采历史拟合和煤层气井产能预测的效果。结果显示,COMET3软件考虑了三重孔隙结构、双扩散特性、煤基质收缩膨胀效应等煤储层特点,可在较大程度上反演和修正煤储层测试数据,有利于提高煤储层特性分析和煤层气井产能预测的客观性。

Method of Coalbed Methane Reservoir Numerical Simulation Based on COMET3

The paper has discussed the development history of coalbed methane（CBM） reservoir numerical simulation software,and described the process of performing reservoir simulation by using the third generation professional software COMET3.Furthermore,it revealed the effect of history matching and production forecasting based on a simulation example.The results show that COMET3 has a good performance in reverse calculating and revising coal reservoir testing parameters by putting some specific coal reservoir features including triple porosity structure,double diffusion feature,coal matrix expansion and shrinkage effect into consideration,it helps to increase objectivity of coal reservoir property analysis and CBM well production forecasting.