Primary Swelling of Fracture 骨折早期肿胀
There were several major types of fractures of the volcanic rock reservoirs: primary fracture and secondary fracture.
本区火山岩油藏的裂缝类型主要有以下几种：原生裂缝和次生裂缝。
When the high-angle fracture has the same direction with the maximum horizontal stress, the subsequent horizontal stress will preserve the primary fracture.
当高角度缝的走向与最大水平主应力的方向一致时，后期水平应力对原生裂缝有保持作用；
With the theory of elasticity, a model of induced stress field is established for primary fracture and the analytic solution is achieved by semi - retro-solution method.
应用弹性力学理论，建立了油气井中初次人工裂缝的诱导应力模型；并采用半逆解法得到初次人工裂缝诱导的应力场的解析解。
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