Abstract: Due to high heterogeneity of pay zones and high viscosity of oil in place in the conglomeratic reservoirs of the Karamayi oil field, water fingering is serious and waterflooding inefficient. To remedy the situation, a foam-drive process was proposed to enhance oil recovery during period of medium water cut. Foaming agents have been selected, optimized and tested, and analog studies on tube/plane models and in the fields have been conducted for the last 16 years until finally a better agent Alkyl Benzene Sodium Sulfonate is tried out which proves to be efficient in reducing the water cut and raising the ultimate rate of recovery by 7-8%(from 26-28%).

摘要： 克拉玛依砾岩油田有些油层含高粘度原油,并有一定的含油面积,储层非均质程度高,注水开发中粘性指状突进显著,水驱效果差。因此提出了在中含水期泡沫驱油试验方案。通过室内选剂、配方优选、管式模型、平面模拟及矿场试验,从试验到观察结束,历时16年(室内试验5年、矿场泡沫段塞4年、清水驱替7年)。结果表明:烷基苯磺酸钠是一种较好的生泡剂,用以生泡驱油,可以大幅度降低中含水期的油田含水率,提高采油速度,对于水驱最终采收率为26～28%的油田,可以提高采收率7～8%,具有良好的经济效果。

关键词: 最终采收率, 驱油试验, 原油泡沫, 矿场试验, 泡沫驱油, 驱油效率, 综合含水率, 高粘度原油, 孔隙体积倍数, 油田