The practice of air foam clockwise circulating and percussion drilling in the Africa;

In September 2007,it began to test air-foam flooding,the current test well group 54 and well group 55 yield more significant,in oil wells of water cut decreased significantly,it explored a new way to enhanced oil recovery for the ultra-low permeability oilfield.

As compared as solid particles, the main advantages of emulisified air bubbles are as follows.

Based on long core displacement experiment of constant temperature air foam, the effect research on enhancing oil recovery by air foam flooding after waterflooding was conducted.