Fracture parameter optimization of network fracturing for horizontal well in low permeability and tight oil reservoir

Network fracturing for horizontal well is an advanced technology of low permeability and tight oil reservoir development.It has played an important role in increasing the productivity of horizontal well and prolonging the stable production period.At present,the fracture parameter optimization of network fracturing in low permeability and tight oil reservoir is still scarce,in general,research didn′ t consider the low permeability characteristics of reservoir.Using the Eclipse numerical simulation method and orthogonal optimization design,a network fracturing production model was established in consideration of the existence of threshold pressure gradient and the horizontal wellbore friction.Based on the characteristics of Huangling Chang 6 low permeability and tight oil reservoir,the fracture parameters of network fracturing for horizontal well were optimized.The influence of fracture network characteristics on the effect of network fracturing was analyzed,providing a complete set of thoughts for the optimization design of network fracturing for horizontal well.This study has been applied in 11 horizontal wells of Huangling Area,all obtaining satisfactory results,which can provide effective guidance for the network fracturing design of horizontal well in low permeability and tight oil reservoirs.