Large-scale staged fracturing technology with pump-down drillable bridge plug for Well Fuye HF-1

Well Fuye HF-1 is the first horizontal well in shale gas deployed by Sinopec in the Sichuan Basin, for the purpose of favorable shale gas exploration of strata series of the Lower Jurassic artesian well group Da’ an village section shale layers. The well was drilled to TD 3 570 m with vertical depth 2 272.06 m and geothermal gradient of 2.50 ℃ per 100 meters. The length of horizontal section is 1136.75 m drilled from TD2 433.25 to 3 570 m, with shale thickness of 27.23 m. Lithological characters of this well are mainly gray and black shale, calcareous shale, mingles with thin layer of gray shell limestone and limestone. The well is completed by ?139.7 mm casing, and stimulated by using the large scale staged fracturing technique with pump-down drillable bridge plugs in 10 stages, and pumped 795.24 t of proppant with a total fluid volume of 16 098.7 m3. The well operations are completed by a number of professional teams, and are also a useful exploration in the shale reservoirs stimulations in China. The experiences and lessons learned from pilot treatment will be meaningful references on large-scale staged fracturing operations for future shale gas horizontal well in China.