二连盆地吉尔嘎朗图凹陷勘探实践及勘探方向

吉尔嘎朗图凹陷为二连盆地一个富油凹陷，历经3轮勘探相继发现稠油油藏、常规构造油藏及构造一岩性油藏，展示该凹陷构造油藏与岩性油藏并存、稠油油藏和常规稀油油藏成带的特点，但油藏类型多样，油气富集规律复杂。通过从构造油藏勘探转向岩性油藏、从斜坡向洼槽转变、从浅层向深层持续勘探等思路转变，实现了富油凹陷的持续发现，并总结了取得成功的启示，指出只有不断地转变思路、深化认识，才能不断取得新发现、大发现。该凹陷仍有5000×10^4t剩余资源可供探索，通过解剖已知油藏、分析油气赋存规律，认为斜坡带宝饶构造两翼是构造油藏继续扩大规模的重要方向，洼槽区岩性油藏勘探潜力较大，致密油领域是发现规模油藏的重要接替领域。

Exploration Practice and Direction in Jiergalangtu Sag,Erlian Basin

Jiergalangtu sag is oil riched in Erlian Basin, where heavy oil reservoir, conventional oil reservoir and structural-lithologic reservoir were discovered one after another after three rounds of exploration. It features in coexistence of structural and lithologic reservoirs, and group distribution of heavy oil reservoirs and conventional thin oil reservoirs. There are various oil reservoirs in Jiergalangtu sag where hydrocarbon accumulation is complex. Continuous exploration is realized in oil enriched depression through changing thoughts in many aspects, such as structural to lithologic reservoir, slope to trough, shallow layer to deep exploration, etc. It is pointed out that new and big discoveries should only be realized by changing the way of thinking and deepening understanding continuously. There are still 50 million tons of remaining resources to be explored in the sag. Through illustrating known reservoirs and analyzing hydrocarbon occurrence rules, it is thought that the important direction of expanded structural reservoir is the two flanks in slope belt of Baorao structure. There is greater potential in exploration of lithologic deposit in trough area. Tight reservoirs are important succeeding field for discovering large-scale reserves.