Application of drillable bridge plug and clustering perforation in staged fracturing for horizontal well

the industrial oil-gas flow can not be obtained by conventional stimulation treatment in Shaximiao Group Jurassic System since the characteristic of low porosity and low permeability.The clustering perforation and sand fracturing of cable drillable bridge plug combination test was first implemented in Well G16H.The plug is downloading through the 8mm cable and pumping through the fracturing truck in horizontal stage.Electrical signals are sent for setting from ground when the plug at the predetermined position,and then the plug and perforating gun releasing to conduct multiple clusters of perforating with the perforating gun up in succession.Every stage has 3-4 perforations,plug setting,perforation and sand fracturing can be completed in 12 h at the soonest.There are ten stages in Well G16H,The coiled tubing of 50.8 mm is successfully drilling and grinding 114.3 mm casing with 9 plugs after fracturing,and the average time consuming of single bridge plug is only about 60 min.24.7 t/d industrial oil-gas flow is obtained after the discharge test in this well.The successful implementation of drillable bridge plug clustering perforation and sand fracturing in this horizontal well preliminarily explores a suit of effective reservoir reconstruction technology which is specific for this low porosity and low permeability block,and accumulates precious field experience for further efficient development of reservoir stratum in Shaximiao Group Jurassic System.