Optimization of refracturing timing for horizontal wells in tight oil reservoirs: A case study of Cretaceous Qingshankou Formation, Songliao Basin, NE China

Jianchun GUO,Liang TAO,Fanhui ZENG

Table 6 Optimization of temporary plugging and diversion times for some intervals of the example horizontal well.

Stage number Horizontal section/m Cluster number Perforation depth/m Refracturing method Breakdown pressure/MPa Classification Number of temporary plugging and diversion 9th stage 2 140- 2 212 Existent fracture 19 2 212 no-refracturing 37.3 1 1 New fracture 1 2 176 Inter-fracture treatment 42.7 2 Existent fracture 20 2 140 no-refracturing 38.3 1 New fracture 2 2 105 Inter-fracture treatment 44.6 2 10th stage 1 995- 2 070 Existent fracture 21 2 070 no-refracturing 38.2 1 New fracture 3 2 032 Inter-fracture treatment 42.5 2 Existent fracture 22 1 995 no-refracturing 36.6 1