An Analytical Model for Fracture Initiation from a Particular Radial Borehole in Hydraulic Fracturing Guided by Multiradial Boreholes

Radial drilling-fracturing, the combination of hydraulic fracturing and radial borehole, is a technology that can guide fractures to directionally propagate efficiently develop low permeability reservoir. In this paper, an analytical model two boreholes (a basic research unit) established predict fracture initiation pressure (FIP) from one particular borehole interference between when guided by multi-radial boreholes. The based on stress superposition principle maximum tensile criterion. effects in situ stress, wellbore pressure, fluid percolation are considered. Then, sensitivity analysis performed examining impact intersection angle boreholes, depth difference radius Biot coefficient, number results show FIP declines with increase decrease Meanwhile, reduction strengthen which conduce formation network connecting Besides, coefficient. Large coefficient enlarge influence range additional field produced enhance mutual growth design, order reduce optimization design be carried out lowering angle, increasing reducing conditions permit. clarifies provides theoretical basis for optimizing layout