A pressure drop model of post-fracturing shut-in considering the effect of fracturing-fluid imbibition and oil replacement

WANG Fei,RUAN Yingqi,CHEN Qiaoyun,ZHANG Shicheng

Table 1 Parameters of Well J20-24 from inversion.

Well name Half length of main fracture/m Conductivity ofmain fracture/(μm2·cm) Permeability of secondary fracture/10-3 μm2 Permeability of matrix/10-3 μm2 Density of secondary fractures/(Fractures·m-2) Imbibed water volume of matrix/m3 Volume of replaced oil into fractures/m3 J20 100 9 0.08 0.007 0.42 10 316 5 683 J21 120 10 0.10 0.012 0.56 12 420 7 358 J22 105 6 0.06 0.005 0.90 5 086 687 J23 126 10 0.09 0.008 0.48 15 648 8 013 J24 115 5 0.07 0.006 0.93 4 859 756