More than 1.4 Bbls of heavy oil (11–15° API) have been discovered to date in hydrodynamic traps in the southeastern Llanos Basin of Colombia, of which the largest is the Rubiales Field. All these are stratigraphic traps defined by the intersection of the top seal (usually the Miocene Carbonera C6 Unit) with an inclined oil-water contact (OWC) (dipping 0.3° towards the NW). In many cases the accumulations occur where there are minor inflections in the top seal, controlled by the underlying paleo-relief of the Paleozoic.

The area of stratigraphic traps coincides with the forebulge of the Llanos Basin. A very striking feature is that the area of the stratigraphic traps, which is found south east of the Meta River is being actively uplifted. This is clearly shown in the different levels of terraces that are present south of the Meta River. The highest present-day terrace has an elevation of near 287 m, (vs. approx. 140 m of the Meta River). All of this is indication that this zone is actively being uplifted (at least 200 m) and eroded in contrast to the rest of the basin that is a zone of deposition.

It has been proposed that the tilted oil-water contact is related to hydrodynamic flow from the margin of the basin, or from areas with a higher hydraulic head. However, the orientation of the tilted OWC trend (NE-SW) is almost perpendicular to the hydraulic head contours for the basin but coincides with the present-day trend of active inversion related to right lateral movement along the Algeciras/Rio Meta lineament and the location of the Llanos Basin forebulge. It is proposed that the tilting of the OWC is related to recent uplift in areas where the oil is biodegraded due bacterial activity and did not yet have time to equilibrate.

迄今为止，在哥伦比亚 Llanos 盆地东南部的水动力圈闭中已发现超过 1.4 桶重油（11-15° API），其中最大的是 Rubiales 油田。所有这些都是由顶部密封层（通常是中新世 Carbonera C6 单元）与倾斜的油水界面（OWC）（向西北倾斜 0.3°）的交叉点定义的地层圈闭。在许多情况下，堆积物发生在顶部密封处有轻微弯曲的地方，由古生代的下伏古地貌控制。

地层圈闭区域与 Llanos 盆地的前缘重合。一个非常显着的特征是在梅塔河东南部发现的地层圈闭区域正在被积极抬升。这清楚地显示在 Meta 河以南的不同级别的梯田中。现今最高的阶地海拔接近 287 m（相对于 Meta 河约 140 m）。所有这些都表明，与盆地的其余部分是沉积区相比，该区域正在被积极地抬升（至少 200 m）并受到侵蚀。

有人提出倾斜的油水接触面与来自盆地边缘或来自具有较高水头的区域的流体动力流动有关。然而，倾斜的 OWC 趋势 (NE-SW) 的方向几乎垂直于盆地的水头等值线，但与当前与沿 Algeciras/Rio Meta 线的右侧运动相关的主动反转趋势相吻合。 Llanos 盆地前缘的位置。有人提出，OWC 的倾斜与最近在石油由于细菌活动而生物降解且尚未有时间平衡的地区的抬升有关。