中国煤层甲烷含量及分布特征

通过对我国煤田勘探阶段以及近年来煤层气测试井或开发井获得的解吸气含量资料的分析研究认为:我国煤层甲烷含量分布大致呈现出南高北低、东高西低的特征。甲烷含量最高者是华南含气区的湘中、湘南和萍乐含气带,云贵川含气区,晋陕蒙含气区的沁水、鄂尔多斯盆地东缘和渭北含气带、黑吉辽含气区的南部;其次是冀鲁豫皖含气区的东部;而黑吉辽含气区中北部、北疆含气区、冀鲁豫皖含气区东部、晋陕蒙含气区北部和中、西部甲烷含量都比较低。该项研究成果将为煤层气勘探开发提供决策依据.

Coalbed Methane Content and Its Distributing Characters in China

According to obtained desorption methane content analysis from domestic coalfield exploration and coalbed gas test wells and development wells in recent years, this paper suggests that the distribution of coalbed methane content are of characteristics of the south-high and north-low, the east-high and west-low in China. The regions with highest methane contents are found mainly in gas-bearing areas or zones in center and south parts of Hunan province and Pingle in South China; those in Yunnan-Guizhou-Sichuan province; those in Qingshui, eastern margin of Erdos basin and Weibei in Shanxi-Shaanxi-Inner Mongolia region; those in south part of Heilongjiang-Jilin-Liaoning province; secondly, in east part of Hebei-Shandong-Henan-Anhui province. The regions with lower methane contents are in north-central part of Heilongjiang-Jilin-Liaoning province, Beijiang area, east part of Hebei-Shandong-Henan-Anhui province, north part and west-central part of Shanxi-Shaanxi-Inner Mongolia region. This result could provide decision-making bases for coalbed gas exploration and development.