煤层气盆地、煤层气系统、煤层气区带的存在及发育程度是煤层气藏形成的充分与必要条件。
The ample and essential conditions of seam gas formation are the existence and development degree of the basin, system and zone of seam gas.
研究表明：中国煤层气的有利聚气带和目标区主要分布在华北聚气区和华南聚气区；
The investigation shows that the potential regions and target areas occur mainly in the North China and South China gas accumulation regions.
沁水盆地南部周缘被挤压性断裂褶皱带所围限，区内缓坡带形成煤层气富集区。
The margin of the southern Qinshui Basin is confined by faulted fold belts, the enrichment region is formed in gentle slope area.
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