Effect of size and density of conglomerate on fracturing network propagation
In order to clarify the characteristic of conglomerate and its effect on fracturing network propagation in Wuerhe Formation,conglomerate parameters of gravel such as its linear density,equivalent radius and their effect on the propagation of fracturing network are studied on the basis of conglomerate discrete simulation by combining with the data of core,imaging logging and conventional logging.Grey correlation analysis is used to select gravel-sensitive conventional logging,and the prediction model of the linear density and equivalent radius of gravel is established.The results show that there is no natural fracture developed in the sandy conglomerate reservoir of Wuerhe Formation in JL2 well area,and the density and radius of gravel are key factors for the propagation of hydraulic fracture.The fracturing propagation form when the hydraulic fracture comes across the gravel can be divided into three types,namely fracture suspended,fracture deflection and fracture through the gravel.The linear density of gravel in Wuerhe Formation is 10 to 16 gravels per meter,and the equivalent radius of gravel is 16 to 24 mm.The prediction model of characteristic parameters of sandy conglomerate is established by selecting A C,CNL and GR sensitive to sandy conglomerate,and the predicting results are consistent with the characteristic parameters of sandy conglomerate from imaging logging and core interpretation,which provides a basis for optimizing sandy conglomerate fractured intervals and optimal design of construction parameters in Wuerhe Formation.
NETL
NSTL
万方数据
