计算结果发现，增加射孔直径、深度可以显著降低起裂压力；
The result indicates that the initiation fracture pressure can be obviously reduced by raising the perforation diameter and depth;
确定水力裂缝在井壁处起裂的压力和方式，对水力压裂设计和施工有重要的作用。
It is important for fracturing design and operation to determine hydraulic fracturing initiation pressure and mode.
以失效评定图技术为基础，建立了一套可用于防止压力管道缺陷起裂的断裂评定工程方法。
Based on the FAD, the engineering safety assessment procedure for pre-venting fracture initiation of piping flaws is established.
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