Common problems of pumping bridge plug and clustering perforation for horizontal shale gas well and countermeasures

In recent years, the pumping bridge plug and clustering perforation technique has been widely used in staged fracturing of shale gas and tight gas reservoirs at home and abroad. In practical operations in horizontal shale gas wells, various problems have been found, such as failed pumping or release of pumping bridge plug due to high pressure, plug setting without cable igniting, plug not set after cable igniting, dumb shooting of the perforating gun or only 1 of 2 clusters shot, and accidental release in coiled tubing perforating. Based on cause analysis for these problems, appropriate preventive measures and solutions are proposed. They have been applied practically to facilitate the fracturing treatment of horizontal shale gas wells. The experiences and lessons thereof will be meaningful references for staged fracturing operations in similar wells.