为研究初始裂缝尖端起裂的条件和所需注水压力,依据断裂力学的复合型裂纹的脆性断裂理论,建立了裂缝尖端力学模型,给出了计算方法。
For researching crack initiation condition and water injection pressure needed, this paper built up a mechanics model of crack tip based on crisp fracture theory of compound crack.
本文根据砂岩储层的物理力学特征,运用断裂力学理论,给出了储层裂缝的应力强度因子的计算方法,定量地分析了开发过程中储层裂缝失稳扩展的判据、裂纹扩展方向。
Using the LFEM theory, the author provided the computing method of stress strength factor of crack and the criteria of crack instability propagation and propagation angle.
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