There exist 3 sets of caprocks of upper Triassic-lower Jurassic,mid Triassic Badong Formatin and lower Triassic Jialingjiang Formation and the direct caprock of overlapping gas reservoir.

 
  • 石柱地區上組合氣藏具備上三疊統下侏羅統、中三疊統巴東組和下三疊統嘉陵江組3套區域蓋層,以及氣層上覆的直接蓋層;石柱復向斜蓋層的宏觀(guān)封閉性能較好,直接蓋層的微觀(guān)封閉性能也較優(yōu)越;
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