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- W2947666494 abstract "Refracturing is a key technology in enhancing the conductivity of fractures from hydraulically-fractured wells. However, the deflecting mechanism of the diverting fracture is still unclear. In this paper, a fully coupled seepage-stress model based on the extended finite element method (XFEM) was developed to realize the deflection mechanism of the refracturing fractures. The modified construction of refracturing was then verified by laboratory experiments. Furthermore, two new deflection angles considering the influence area along initial fracture length were introduced to evaluate the refracturing. The numerical results demonstrated that: (1) lower stress difference, larger perforation angle and longer perforation depth can lead to a higher deflection angle, thereby a more curving propagation path of the diverting fracture; (2) increasing injection rate or fluid viscosity can significantly enhance the diverting behavior; and (3) an initial location near the root of the initial fracture results in a larger value of the deflection angle, which is preferred for far-field refracturing. The conclusions in this study can be a systematic guide for the parameter optimization in refracturing treatment." @default.
- W2947666494 created "2019-06-07" @default.
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- W2947666494 date "2019-05-28" @default.
- W2947666494 modified "2023-10-11" @default.
- W2947666494 title "Numerical Simulation on Deflecting Hydraulic Fracture with Refracturing Using Extended Finite Element Method" @default.
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- W2947666494 doi "https://doi.org/10.3390/en12112044" @default.
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