Study and field application on broken-down tecnology of acoustic and negative pressure

Due to the damage and sanding of the formation, the oil productivity is severely affected. The applicability of the conventional flowing technology with gassy water is very limited. The effect of broken-down is not very satisfying. In order to solve this problem above mentioned, this paper proposed the Acoustic Assistant drainage and Broken-down Technology. This technology combines the Acoustic Assistant drainage with the flowing technology with gassy water together. Through the common function of acoustic vibration and flowing with gassy water, the sweeping areas are enlarged, at the same time, the back-drainage of the formation is strengthened, which makes the ultimate effect of broken-down is improved. This technology has been widely applied in the GUDAO oilfield, SHENGLI, the effect is obviously better than that of the conventional flowing technology with gassy water. It has a good effect on new wells, the wells with long time shut-in and the wells with low productivity.