【摘要】 煤系天然气是煤系中煤、炭质泥页岩和暗色泥页岩生成的天然气,是天然气工业中极其重要的组成部分,具有巨量的资源规模,包括连续型煤层气、页岩气、致密气和圈闭型煤系气藏等资源类型。通过梳理国内外煤系天然气勘探开发进展,重点论述了圣胡安、苏拉特、西西伯利亚、鄂尔多斯盆地煤系气的形成与分布特征,明确煤系天然气是天然气供应的重要战略领域,主要取得3项认识:①欧亚东西向聚煤带和北美南北向聚煤带是全球两个主要聚煤区,晚石炭世—二叠纪、侏罗纪和晚白垩世末期—新近纪是3个主要聚煤期;②"连续型"和"圈闭型"是煤系天然气的两种主要成藏模式,提出生气强度大于10×10~8 m~3/km~2是形成煤系大气田的基本条件,揭示中高阶煤层气向斜富集、低阶煤层气源盖配置的成藏规律;③预测全球煤系天然气剩余资源潜力巨大,源外煤系气仍集中分布在中亚—俄罗斯、美国、加拿大等国家或地区,源内煤层气集中分布在12个主要国家,预测中国2030年煤系天然气产量有望超过1 000×10~8 m~3,其中常规煤系气产量为(500～550)×10~8 m~3,煤系致密气产量为(400～450)×10~8 m~3,煤层气产量有望达到(150～200)×10~8 m~3。图4表2参43更多还原

【Abstract】 Coal-measure gas is the natural gas generated by coal, carbonaceous shale, and dark shale in coal-measure strata. It includes resources of continuous-type coalbed methane(CBM), shale gas and tight gas reservoirs, and trap-type coal-bearing gas reservoirs. Huge in resources, it is an important gas source in the natural gas industry. The formation and distribution characteristics of coal-measure gas in San Juan, Surat, West Siberia and Ordos basins are introduced in this paper. By reviewing the progress of exploration and development of coal-measure gas around the world, the coal-measure gas is confirmed as an important strategic option for gas supply. This understanding is mainly manifested in three aspects. First, globally, the Eurasian east-west coal-accumulation belt and North American north-south coal-accumulation belt are two major coal-accumulation areas in the world, and the Late Carboniferous–Permian, Jurassic and end of Late Cretaceous–Neogene are 3 main coal-accumulation periods. Second, continuous-type and trap-type are two main accumulation modes of coal-measure gas; it is proposed that the area with gas generation intensity of greater than 10×10~8 m~3/km~2 is essential for the formation of large coal-measure gas field, and the CBM generated by medium-to high-rank coal is usually enriched in syncline, while CBM generated by low-rank coal is likely to accumulate when the source rock and caprock are in good configuration. Third, it is predicted that coal-measure gas around the world has huge remaining resources, coal-measure gas outside source is concentrated in Central Asia - Russia, the United States, Canada and other countries/regions, while CBM inside source is largely concentrated in 12 countries. The production of coal-measure gas in China is expected to exceed 1000×10~8 m~3 by 2030, including(500–550)×10~8 m~3 conventional coal-measure gas,(400–450)×10~8 m~3 coal-measure tight gas, and(150–200)×10~8 m~3 CBM.更多还原