巴丹吉林盆地麻木乌苏凹陷基岩含油气特征及成藏条件分析

巴丹吉林盆地包含多个中生代凹陷,在其西北部麻木乌苏凹陷中首批钻探的两口井,均在前中生界基岩顶部钻遇良好油气显示,反映该区具有形成基岩油气藏的可能。分析认为,油气源来自侏罗系,不整合面和断层为主要运移通道,基岩具有相对较好的储集性,存在系列断块潜山型圈闭,油气分布显示出差异聚集的特点。因此,基岩油气藏是该区勘探的重要类型之一,扩大了油气勘探领域。

BEDROCK HYDROCARBON-BEARING CHARACTERISTICS AND POOL-FORMING CONDITIONS OF MAMUWUSU SAG IN BADAIN JARAN BASIN

There are several Paleozoic sags in Badain Joran Basin.The first two wells drilled in Mamuwusu sag of the northwestern part of the basin were all found good oil/gas show,which indicated the possibility of forming bedrock oil/gas pools.The source rocks is Jurassic,the unconformity surfaces and faults are the dominant migration pathway,and the bedrock shows relative good storage ability.There are a series of block traps of buried hills in the area and distribution of oil and gas is different in different parts.The bedrock oil gas pools may be the important exploration targets in the basin.