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从线弹性断裂力学出发,对煤储层复杂裂缝系统的形成机制进行了研究。建立了天然裂缝与水力裂缝的干扰模型以及新裂纹起裂角计算模型,分析了临界水平应力差、新裂纹起裂角的影响因素,并研究了天然裂缝倾角和天然裂缝密集程度对复杂裂缝网络形成机制的影响。
Based on the linear elastic fracture mechanics, the formation mechanism of the complex fracture system in coal reservoirs has been studied. The interference model between natural fractures and hydraulic fractures and the calculation model of crack initiation angle are established. The critical horizontal stress differences and the influencing factors of cracking angle of new fractures are analyzed. The effects of natural fractures and natural fractures on complex fracture networks The impact of the formation mechanism.