Due to the large natural fractures and the single extension of hydraulic fractures

gas channeling occurs easily during fracturing of multi-platform

as a result the instantaneous gas production of adjacent wells is reduced by at most 93 %

and the wellhead pressure is increased by at most 12 MPa

which seriously affects the fracturing development effect of shale gas. For this complex situation

a fracture control and channeling prevention technology for horizontal wells of shale gas is proposed

which mainly includes fracture-length control of multiple fracture and steering fracture. By the measures of increasing the number of hydraulic fractures to reduce the net pressure

or using temporary plugging materials to steer hydraulic fractures

the extension direction of hydraulic fractures has been controlled and the fracture complexity has been increased to reduce the interacting of adjacent wells

and finally make the shale gas effectively develops in the well controlled gas drainage area. The numerical simulation shows that after applying this technology

the effective fracture length is shortened by 11.9 % ～24.8 % The field application effect is obvious

the fracture length monitored by real-time micro seismic is reduced by 24 %

and the real-time monitoring pressure of adjacent wells does not change. The fracture control and channeling prevention technology in horizontal wells of shale gas does not only provides theoretical support for field application

but also reduces the probability of complex situations and improves the production of single well.