Application of Multi-pulse Perforator+APR+Hydraulic Pump in Dagang Oilfield

A combination of multi-pulse perforator, APR and hydraulic pump can fulfill the perforating and testing in the severely contaminated reservoir by one tool string. The instantaneous pressure produced by the combustion during multi-pulse perforating and multi-level pulse may result in the strenuous vibration of testing string, affect the function of packer and electronic pressure thermometer. A type of peak pressure controlling valve, a new type damping device for decreasing mechanical vibration are used, combined with the safety design of gunpowder amount. The test applications of three drilling wells in Dagang beach and Jidong Nanpu offshore oilfield show that this technology is safe and reliable, the skin factors that represent the contamination degree are less or close to zero. It also effectively eliminate or reduces the effect of pollution, and has a broad application prospect.