A coupled hydromechanical code based on a distributed brittle damage material model has been developed in order to simulate hydraulic fracturing processes. As specific feature, the code does not assume the development of a discrete number of sharp cracks but considers a diffused damage that takes place under overall confinement of the system. The code is validated against a laboratory test reproducing the local effects of a hydraulic fracturing procedure. The numerical model of the laboratory test is then used to conduct a parametric analysis where the influence of the principal hydromechanical parameters on the hydraulic fracturing performance is assessed. Finally, the code is applied to simulate multiple hydraulic fracturing interventions in a large scale shale reservoir. In all applications considered, the model shows a good predictive capability in terms of damage extension.

中文翻译：

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通过多孔脆性损伤材料模型的岩土材料水力压裂方法

为了模拟水力压裂过程，已经开发了一种基于分布式脆性损伤材料模型的耦合流体力学规范。作为特定功能，代码不假定离散的尖锐裂纹的产生，而是考虑了在系统的整体限制下发生的分散损坏。该代码已通过实验室测试进行了验证，该测试再现了水力压裂程序的局部影响。然后使用实验室测试的数值模型进行参数分析，在其中评估主要液压力学参数对水力压裂性能的影响。最后，将代码应用于模拟大型页岩储层中的多种水力压裂干预措施。在所有考虑的应用中，