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华北地区是我国煤层气勘探的重点和热点地区，开展本区煤层气聚集带的评价，对于优选有利目标区，加速该区煤层气的开发利用具有重要意义。在系统收集各方面资料的基础上，文章对华北地区煤层气资源的时空分布特征进行了总结，明确了主要勘探目的层及其含气量的分布规律，并利用模糊综合评价方法，在建立适合于本区地质实际的评价标准的基础上，对14个聚集带进行了评价，优选出最有利的聚集带1个，有利的聚集带3个，并对四个聚集带进行了地质条件、勘探风险的系统分析，为本区下一步煤层气的开发利用提供了依据。研究认为，沁水大型含气带是煤层气开发利用最现实的地区，其次为鄂尔多斯东缘大型富气带、太行山东麓中型富气带、徐淮中型富气带，豫北—鲁西、华北北缘等五个煤层气聚集带由于资源量小，含气丰度低、埋藏深度大及煤变质程度低等多种原因，目前不适宜于进行煤层气勘探。

EVALUATION AND OPTIMIZATION OF COAL BED METHANE ACCUMULATION ZONES IN NORTH CHINA

North China is the hot spot and key region of coal bed methane(CBM) exploration in China. It is very important for optimizing the beneficial target areas and accelerating the development and utilization of CBM to carry out the evaluation of CBM accumulation zones in this region. In the paper, on the basis of systematically collecting various data, the time-space distribution characteristics of CBM resources in North China are summarized; the main exploration target horizons and their CBM-bearing volume distribution laws are found out; on the basis of setting up the evaluation standards suitable for the geological conditions of this region, fourteen CBM accumulation zones are evaluated by use of the comprehensive fuzzy assessment method, the one and there of them being optimized as the most favorable and favorable accumulation zones respectively; and the systematical analyses of the geological conditions and exploration risks are carried out for the four accumulation zones, thus providing basis for the next CBM development and utilization in this region. Through investigation, it was considered that the Qinshui large-sized methane-bearing zone is the actual area of CBM development and utilization, then the large-sized methane enrichment zone of eastern fringe of E' erduosi Basin, the medium-sized methane enrichment zone of the eastern foot of Taihangshan Mountain and the Xuhuai medium-sized methane enrichment zone; and the other five CBM accumulation zones including the north Henan Province-west Shandong Province and the northern fringe of North China, etc., are unsuitable for carrying out CBM exploration recently because of many kinds of reasons, such as small resources, low gas abundance, large burial depth and low coal metamorphic rank, etc.