塔里木盆地英吉苏凹陷成藏机理分析  

ANALYSIS OF RESERVOIRING MECHANISM IN YINGJISU SAG OF TALIMU BASIN

作　　者：刘玉魁[1] 胡剑风[2] 闵磊[1] 郑多明[2] 冯游文[1] 

机构地区：[1]中国石油塔里木油田分公司勘探事业部 [2]中国石油塔里木油田分公司勘探开发研究院

出　　处：《天然气工业》2004年第10期6-9,共4页Natural Gas Industry

摘　　要：文章从英吉苏凹陷石油地质特征、英南2气藏成藏机理出发,对英南2气藏进行了解剖,力求达到指导该区下一步勘探的目的。研究中主要结合该区烃源岩特征以及英南2气藏的圈闭特征、储盖组合、流体性质、沉积埋藏及烃源岩热演化史等对英南2气藏的成藏过程进行了详细的论证。文章认为英南2气藏志留纪末期,原生古油藏形成;二叠纪遭到破坏,形成凝析油气—湿气藏;三叠纪末,该区整体抬升并遭到剥蚀;早白垩世末期,寒武—奥陶系烃源岩开始二次生烃,侏罗系烃源岩开始少量生油,阿拉干、阿拉干北断裂进一步活动,油气沿断裂向上运移,英南2气藏形成;晚白垩世—新生代,该区为稳定沉降期,英南2气藏进一步充注。英东洼槽周围构造高点是最有利的现实勘探区。In light of the petroleum geological features of Yingjisu Sag and the reservoiring mechanism of Yingnan-2 gas reservoir, the reservoir was analyzed so as to make every effort to get the purpose of guiding the next exploration in this region. The reservoiring mechanism, of Yingnan-2 gas reservoir was studied in detail in combination with the hydrocarbon source rock characteristics in this region and the trap, reservoir-caprock assemblage, fluid property, sedimentation-burial history and source rock thermal evolution history of the reservoir. In the paper, it is considered that the Yingnan-2 primary ancient oil reservoir was formed at the end of Silurian; the condensate (wet gas) reservoir was formed because of the ancient oil reservoir's being destroyed during Permian; at the end of Triassic, this region wholly rose and was eroded; at the end of Early Cretaceous, Ying-nan-2 gas reservoir was formed, because the secondary hydrocarbon generation of Cambrian-Ordovician hydrocarbon source rocks started, Jurassic hydrocarbon source rocks began to generate a few oil and the Alagan and North Alagan faults further activated, thus making the oil and gas migrating upwards along the faults ; and during Late Cretaceous-Cenozoic.this region was in the stably settling period and Yingnan-2 gas reservoir was recharged. The structural highs around Yingdong Seg are the most favourable exploration areas.

关 键 词：英吉苏凹陷 气藏 烃源岩 成藏机理 储盖组合 塔里木盆地 圈闭 凝析油 油气 石油地质特征 

分 类 号：P618.13[天文地球—矿床学]