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Numerical Approach to Hydraulic Fracturing in Heterogeneous and Permeable Rocks

机译：非均质和渗透岩石水力压裂的数值方法

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Circular samples with borehole are numerically loaded under internal hydraulic pressure rising at a constant rate under zero confining pressure to investigate the hydraulic fracture initiation, propagation and breakdown. Both heterogeneity and permeability of the rocks are taken into account in the studies. The simulations are conducted with a flow-coupled Rock Failure Process Analysis code (F-RFPA~(2D)). The modeling results suggest that the fracture initiation and propagation, the roughness of fracture path and the breakdown pressure are influenced considerably by the heterogeneity of the rock. The borehole diameter elongation and the stress field evolution around the fracture tip during the fracture propagation are also found to be informative in interpreting the hydraulic fracturing behavior.
机译：在内部液压压力下，在零围压下以恒定速率增加数值的带孔圆形样品，以研究水力压裂的产生，扩展和破坏。研究中考虑了岩石的非均质性和渗透性。使用流动耦合的岩石破坏过程分析代码（F-RFPA〜（2D））进行模拟。模拟结果表明，岩石的非均质性对裂缝的起裂和扩展，裂缝路径的粗糙度和破裂压力有很大的影响。还发现，在裂缝扩展过程中，钻孔直径的延长和裂缝尖端周围的应力场的演变对于解释水力压裂行为是有益的。

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