Optimization of fracturing operation parameters of horizontal wells based on multi fracture propagation patterns
In order to study the influence of the actual pattern of multi-cluster fracturing fracture propagation on the productivity predic-tion of horizontal wells,and then scientifically guide the fracturing construction design.Firstly,based on DDM,the influence of two fac-tors,namely,the spacing and the number of fractures,on the pattern of multi-fracture propagation and the flow distribution was studied.Then,the CMG numerical simulation software was used to establish the fracturing homogeneous model of single horizontal well combined with the actual geological parameters of H block in Jilin oilfield.Based on the maximum productivity,the optimal fracturing operation parameters were selected.The results showed that with the increase of cluster number,the percentage difference of liquid intake and the crack length difference increased first,and then decreased slightly.When the four-cluster perforation fracturing was carried out,the liq-uid inflow percentage and fracture width of fractures 2 and 3 were too small.Cluster spacing has an important influence on the uniformity of multi-fracture propagation.In order to ensure higher uniformity of multi-fracture propagation,large cluster spacing should be used in actual fracturing construction.Under the condition of formation parameters in H block,the optimal fracture cluster number was 3 clus-ters,the optimal cluster spacing was 40 m,the optimal fracture half length was 120 m,and the optimal fracture diversion capacity was 10 μm2·cm.The block was suitable for fracturing with a viscosity of 30 MPa·s and 6 m3/min displacement fracturing fluid.
万方数据
维普
