COMPOSITE PERFORATION METHOD AND DEVICE FOR CARRYING SUPPORTING AGENT

摘要

A composite perforation method and device for carrying a supporting agent capable of effectively supporting fractures near a wellbore and reducing fracture closures. The device is composed of one composite perforator or multiple connected composite perforators, wherein a pressure release hole is provided on the composite perforator, with a broken type blocking piece for sealing mounted on the pressure release hole; a supporting agent box is provided at the opening end for perforating bullets in the perforator; a supporting agent is contained in the supporting agent box; and a center through-hole is provided at the center of the supporting agent box. During a composite perforation operation, a perforation hole channel is formed between the wellbore and the stratum by a high-speed jet current generated after the detonation of a perforating bullet, and at the same time the negative pressure created by the jet current is used to carry the supporting agent into the perforation hole channel; and subsequently, secondary energy arising from exitation of the fracturing gunpowder in the perforator performs a fracture on the perforation hole channel, so as to generate fractures near the wellbore and send the supporting agent into extended fractures, achieving the support of fractures.