对于具有气顶和油柱的油藏来说 ,常规的开采方法只是从油柱中进行采油 ,而对气顶却保持不动 ,以便使其膨胀 ,提供开采过程中的压力维持。借助于油藏的几何形态、油层倾角及采油速度 ,气就可以锥进到采油井中 ,或发生气窜 ,从而导致油井中气 -油比明显升高。本文提出了一种极好的气顶和油柱同时开采的方法 ,该方法是在油气界面上进行注水并产生一道水墙 ,并能把气顶和油柱分离开。这种方法已经被应用于小倾角、大气顶及低残余气 -水饱和度的油藏之中。现在已经证实 ,如果存在气的即时市场 ,这种方法的净现值便可得到改善。地质统计油藏模型证实 ,气顶的开采量受非均质性的影响较小 For reservoirs with a gas cap and oil column, the conventional method of recovery is to recover oil from the oil column while maintaining the gas cap intact to allow it to expand, providing pressure maintenance during the production. With the reservoir geometry, dip angle and oil recovery rate, gas can be cones into the production wells, or gas channeling, resulting in significantly increased gas-oil ratio in the well. This paper presents an excellent method of simultaneous gas and oil column mining by injecting water at the hydrocarbon interface and creating a water wall that separates the gas cap from the oil column. This method has been applied to reservoirs with small dip, top of the atmosphere and low residual gas-water saturation. It has now been confirmed that the NPV of this method can be improved if there is an immediate market of gas. Geostatistical reservoir models confirm that the amount of gas capped is less affected by heterogeneity