伊通盆地莫里青断陷原油物性与油气运移

Petrophysics Property and Hydrocarbon Migration of Moliqing Fault Depression in Yitong Basin

石油物理性质的纵横向变化对于分析油气运移、聚集和分布特征具重要的参考价值。本文基于实测数据的统计分析,论述了伊通盆地莫里青断陷双阳组原油物性的纵横向变化规律,并结合构造分布格局探讨了研究区油气运移的主要方向及有利勘探区带。研究表明,莫里青断陷原油品质较好,以高蜡、中-高粘度正常原油为主,且各物性参数之间有一定的相关性;原油物性参数存在由深至浅、自西北向东南边缘逐渐减少的趋势;原油运移的有利方向在纵向上为从生油凹陷深部至浅部,在横向上为从生油凹陷中心所在的西北缘向东南边缘,东南缘和小孤山斜坡带为研究区有利的油气勘探区带。

The vertical and horizontal variance of petrophysics property has important reference value for analysis of petroleum migration, accumulation and distribution. On the statistical analysis of practice measure data of property in crude oil, which collected from the Shuangyang formation of Moliqing fault depression in Yitong Basin, the rule of vertical and horizontal variance is discussed. Considering structural distribution configuration, the main direction of petroleum migration and favorable exploration zone are also analyzed. The study shows that the quality of the crude oil is good, with high wax content and middle to high viscosity. There is certain correlation between these parameters. The value becomes less and less from deep tier to shallow tier, from northwest to southeast margin. Therefore, the favorable direction of petroleum migration in the depression is from deep to shallow vertically, northwest to southeast margin horizontally. The southeast margin and slope of Xiaogushan are favorable zones for petroleum exploration.