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煤层气的产出过程与常规天然气不同，要经过解吸、扩散、渗流三个过程，煤层气数值模拟是描述这一过程的特有技术。本文简单介绍了煤层气数值模拟技术理论和Coalgas软件的特点，以沁水煤层气田樊庄区块煤层气试验井组为实例，拟合了对该区块产气、产水生产历史，确定了接近于实际储层的地质模型，在此基础上进行了开发井网、井距等的优化研究和开发指标预测，确定了沁水煤层气田樊庄区块的最佳开发方式。

Numeral Simulation Technology and Application of Coal-bed Gas Fields

The output process of coal-bed gas is different with the common natural gas. The process includes 3 steps,i.e. de-sorption,diffusion and percolation. The numeral simulation of coal-bed gas is a special technology to describe the process. The article introduces the numeral simulation theory of coal-bed gas and the characteristics of Coalgas software briefly. Taking the test well group of coal-bed gas in Fanzhuang block of Qinshui coal-bed gas field as example,with the history of gas and water production in the block,a geological model closing to the real situation is developed. Based on the model,the optimization of well pattern and spacing for production,and the prediction of development indexes are conducted. And the optimum development way is determined for Fanzhuang block of Qinshui coal-bed gas field.