Effect of the Perforations Number in Clusters on Fracture Propagation in Continental Shale Reservoirs
The lamination and foliation development of continental shale reservoirs has characteristics of slightly-extended fractures in field fracturing construction and it restricts effective reconstruction of such reservoirs.Abiding by the design concept of"controlling the proximity and expanding the distance",the ef-fect of the number of perforations on near-wellbore fracture propagation was studied from the perspective of intra-cluster porosity.In addition,through considering the transverse isotropic mechanical properties of the reservoir,the flow distribution between perforations and the interaction of fluid-structure coupling,a nu-merical model of single cluster and multiple fracture propagation in continental shale horizontal wells was established and the effects of perforation quantity and displacement on fracture propagation were investigat-ed.The results show that,both the fracture near-wellbore complexity and fracture height increases with the increase of displacement,but decreases with the increase of the number of single cluster holes.In addition,the optimal number of holes in the cluster under different displacement was obtained.The optimal number of holes in the cluster with 0.3 m3/min displacement is 8 holes and that in the cluster with 0.5 m3/min dis-placement is 6 holes,as well as that in the cluster with 0.7 m3/min displacement is 8 holes.
continental shaletransverse isotropyperforation in clusterfracture propagation
万方数据
维普
