The existing faults affects the propagation of pressure waves in the composite reservoirs

meanwhile

the location of faults affects the curves of the bottom hole pressure. Based on the principle of seepage mechanics and point source function

the fractured-well line source solution of fault composite reservoirs in Laplace domain was obtained by image principle

pressure drop superposition principle and Laplace integral transformation. The bottom hole pressure solution of finite-conductivity fractured wells was obtained by coupling fracture of fractured-well and reservoir model. The typical characteristic curves of dimensionless bottom hole pressure and pressure derivati

ve were drawn by Stehfest numerical inversion in the real space. The results showed that the characteristic curve was divided into seven flow stages generally. In the early stage

the position of dimensionless bottom hole pressure and pressure derivative curves decreased with the increase of the fracture conductivity. When the mirror well was located in the inner region

the pressure derivative curves of radial flow and subsequent bottom hole pressure showed horizontal lines of 0.5

1 and fluidity ratio

M

12

in inner part and outer part

and the larger the inner radius was

the longer the radial flow in the inner zone would be. When the mirror well was located in the outer region

the pressure-derivative curve of radial flow and subsequent bottom hole pressure showed horizontal lines with the value of 0.5

0.5

M

12

and fluidity ratio of

M

12

in inner and outer zones.