Issue 58

Q.-C. Li et alii, Frattura ed Integrità Strutturale, 58 (2021) 1-20; DOI: 10.3221/IGF-ESIS.58.01

increased to 16m 3 /min, which is nearly twice as long as the fracture length when the injection rate is 4m 3 /min (see Fig.8G). As what we can see from Fig.8G, the numerical model in this paper is almost fractured into the upper and lower parts at the end of fracturing operation when the whole operation is carried out at a larger injection rate.

(A): Pressure evolution at the injection node during fracturing when the perforation azimuth is 40 °

(B): Effects of perforation azimuth on fracture initiation

(C): Effects of perforation azimuth on and fracture reorientation Figure 7: Effects of perforation azimuth on initiation pressure and fracture reorientation.

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