The application of advanced fracturing technology greatly increased shale gas production of pilot well group in Jiaoshiba of Fuling area

and improved commercial development of shale gas in China.Based on the analysis of shale reservoir architecture and geological characteristics

the brittleness and fracturability of reservoir rock were evaluated through rock mechanics parameter testing and mineral composition analysis.Shale in Wufeng-Longmaxi Formations is characterized by good organic matter type

high gas content and high brittleness index.According to the idea of "complex fracture network+main supporting fracture"

and aiming at enlarging the volume of fractured shale reservoir

we selected most suitable materials for fracturing fluids

optimized fracturing design and related technologies

and determined the technolo-gical methods for fracturing of the pilot well group.Finally

a set of optimal staged fracturing technologies were developed and applied to the horizontal wells in Jiaoshiba of Fuling area.A total of 26 wells were fractured and obtained high open flow of gas in the range of 10.1×10

4

~155.8×10

4

m

3

/d

verifying the effectiveness of these fracturing technologies.