关键词: 页岩气, 主裂缝, 次裂缝, 网络裂缝渗透率, 水力裂缝参数, 储层参数

Abstract:

To settle the difficulty of describing the complicated fracture network of shale gas after hydraulic fracturing，by
using the shale model in Eclipse software，we build an equivalent method to characterize the effective stimulated reservoir
volume as primary fracture and permeability of fracture network，which is to replace the primary fracture and secondary fracture
method. The two methods are equivalent in gas production and pressure drainage，but the proposed method can solve the
problem of heavy workload to grid manually and slow running. In this paper，we analyze the influence of hydraulic fracture
parameters and reservoir parameters on shale gas production after fracturing by using the equivalent method. Meanwhile，
we use linear experiments of Plackett-Burman type to screen the sensitivity of hydraulic fracture parameters and reservoir
parameters. Simulation results indicate that the hydraulic fracture height，fracture network permeability and ESRV are the
three most sensitive parameters among hydraulic fracture parameters and the sensitivity of reservoir parameters is arranged
from strong to weak as follows：reservoir pressure coefficient，total gas content，effective reservoir thickness，rate of adsorbed
gas，bottom hole flowing pressure and permeability of matrix，This paper can provide theoretical basis for well and formation
selection and hydraulic fracturing design optimization.

Key words: shale gas, primary fracture, secondary fracture, permeability of fracture network, hydraulic fracture parameters,
reservoir parameters