三塘湖盆地条湖凹陷石炭-二叠系石油地质条件及勘探方向

CARBONIFEROUS-PERMIAN PETROLEUM GEOLOGY AND EXPLORATION DIRECTION OF TIAOHU DEPRESSION IN SANTANGHU BASIN

三塘湖盆地前期油气勘探开发主要集中在马朗凹陷主体及周缘,随着勘探程度的不断提高,寻找、探索新的勘探开发接替领域就是摆在吐哈油田火山岩油气勘探的一道难题。条湖凹陷油气资源量丰富,火山岩勘探及研究程度较低。根据邻近凹陷(马朗凹陷)实际勘探经验及条湖凹陷目前钻井资料,以现代油气地质理论为指导,系统分析了条湖凹陷的烃源岩、储集层、盖层及圈闭等油气系统形成的基本要素。研究表明,条湖凹陷勘探前景广阔,存在多个有利的油气勘探领域。下一步应在拓展石炭-二叠系风化壳型及裂缝型油藏的同时,积极探索条湖凹陷石炭系哈尔加乌组火山岩内幕型油气藏。

The oil&gas exploration and development in Santanghu Basin focused on the main body of Malang depression and its periphery.With the deepening of exploration,to find new areas for exploration of Volcanic oil&gas reservoirs is very difficult in Turpan-Hami Oilfield.Tiaohu depression is rich in oil&gas resources with low-degree exploration on Volcanic reservoirs.In this paper,the primary factors,including hydrocarbon rocks,reservoirs,caps and traps for hydrocarbon system formation are analyzed based on the experiences and drilling data in neighboring areas.It shows that there are geological conditions for reservoir in Carboniferous-Permian system in Tiaohu depression,and several favorable areas for prospect.In the next stage,explorations for volcanic reservoirs should be more active in C2h and C2b groups of Carboniferous system in Tiaohu depression,based on the explorations in Carboniferous-Permian system of Shibandun structure in southern thrust belt.