关键词: 油气田井开发工程, 泡沫, 水玻璃凝胶, 封堵性能, 非均质油藏, 深部调剖, 液膜

Abstract: A kind of waterglassgel enhanced foam system used in the deep profile control of typical heterogeneous reservoir was investigated on its gelling feature, microstructure, and plugging performance in the rock core. Experimental results show that the reaction between hydrochloric acid and sludge under airtight condition is an equilibrium reaction, the reaction rate decreases exponentially with the increase of the initial pressure, the system gelling time increases with the decrease of the pH value, and the plugging performance of the waterglassgel enhanced foam system is superior to that of ordinary foam system due to the small foam diameter and high interfacial film strength.

Key words: oil/gas field development engineering, foam, waterglassgel, plugging performance, heterogeneous reservoir, deep profile control, lamella,