准噶尔盆地煤岩气的勘探发现及意义

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基于对准噶尔盆地侏罗系八道湾组和西山窑组煤岩储层、天然气地球化学特征,以及煤层气井试气结果的分析,提出在侏罗系煤层中存在既不同于煤层气、也不同于常规气的一种新的聚集类型的天然气——煤岩气.煤岩气是介于常规气和煤层气之间的一种新的天然气资源类型,具有常规储层和非常规储层共存,游离气和吸附气共生,自源气和它源气互补聚集、有序分布的特征.针对这一新的勘探领域,优选白家海凸起彩31井断背斜构造,以侏罗系西山窑组煤层为目的层部署风险探井——彩探1H井,试气获得最高日产5.7×104m3、稳产日产2×104m3的工业气流,实现了煤岩气勘探的重大发现.煤岩气的提出与勘探发现实现了天然气地质认识新突破,开辟了天然气勘探新领域,引领了天然气勘探新方向,对含煤盆地天然气勘探具有重要且深远的影响.
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