乌尔逊-贝尔凹陷油气成藏主控因素分析Analysis of dominant factors to hydrocarbon accumulation in Wuerxun-Beier depression
李明刚,庞雄奇,马中振,徐旺林,魏建设
LI Ming-gang1,PANG Xiong-qi1,2,MA Zhong-zhen1,XU Wang-lin3
摘要(Abstract)：
乌尔逊-贝尔凹陷是海拉尔盆地最重要的油气发现区。经过20多年的油气勘探,乌尔逊-贝尔凹陷油气勘探已取得长足进展,但是该凹陷地质条件相当复杂,影响油气成藏因素较多,油气勘探难度越来越大。在乌尔逊-贝尔凹陷油气藏特征研究的基础上,提出了4个油气成藏主控因素:烃源灶控制着油气藏规模、数量与分布;沉积岩相控制着油气富集和分布;区域盖层越厚,其下储集层富集油气概率越大;断裂作用对圈闭含油气性变化的影响十分显著。通过主控因素研究表明,贝中次洼及乌东斜坡带是下步有利勘探区带。
Wuerxun-Beier depression is the most important area for hydrocarbon discovery in Hailaer basin.After more than 20 years exploration,significant improvement has made in hydrocarbon exploration in Wuerxun-Beier depression.But in this depression,the geologic conditions are very complicated,and there are many factors affecting hydrocarbon accumulation.So,the exploration in this area is more and mose difficult.Based on the research on hydrocarbon reservoir characteristics of Wuerxun-Beier depression,4 dominant factors affecting hydrocarbon accumulation are put forward: hydrocarbon kitchen dominates the size,number and distribution of hydrocarbon reservoir;sedimentary rock controls hydrocarbon richness and distribution;thicker regional seal means more possibility of hydrocarbon accumulation in underlying reservoir;the effect of rifting on hydrocarbon generation in trap is obvious.The research on the main dominant factors indicates that Beizhong sub-depression and Wudong slope are the favorable zones for further exploration.
关键词(KeyWords)：
乌尔逊-贝尔凹陷;主控因素;烃源灶;断裂
Wuerxun-Beier depression;main dominant factors;hydrocarbon kitchen;fault
基金项目(Foundation):
作者(Author):
李明刚,庞雄奇,马中振,徐旺林,魏建设
LI Ming-gang1,PANG Xiong-qi1,2,MA Zhong-zhen1,XU Wang-lin3
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