| 地层水力压裂中的应力强度因子 |
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| 引用本文： | 阳友奎,周时光.地层水力压裂中的应力强度因子[J].西南科技大学学报,1993(3). |
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| 作者姓名： | 阳友奎 周时光 |
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| 作者单位： | 四川建材学院资源经济工程系
(阳友奎)，四川建材学院资源经济工程系(周时光) |
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| 摘 要： | 本文根据弹性断裂力学的叠加原理,建立了地应力场和流体压力作用下水力压裂中孔边轴对称裂纹尖端应力强度因子K_1的近似解析表达式。这些近似公式在工程意义上是相当精确的,与可以获得的数值结果的比较表明其相对误差仅百分之几,为水力压裂中破裂压力的断裂力学方法预测和裂缝扩展过程的模拟提供了快速、简单且相当精确的方法。
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| 关 键 词： | 水力压裂 孔边轴对称裂纹 应力强度因子 叠加原理 解析表达式 |
The Sress Intenstey Factors For Hydraulic Fracturing in ROCK Formation |
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| Yang Youkui Zhou Shiguang.The Sress Intenstey Factors For Hydraulic Fracturing in ROCK Formation[J].Journal of Southwest University of Science and Technology,1993(3). |
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| Authors: | Yang Youkui Zhou Shiguang |
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| Institution: | Sichuan Institute of Building Materials |
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| Abstract: | Based on the principle of superposition of linear elastic fracture mechanics,this paper derives the approximate analytical expressions of stress intersity factors (KI) at the crack tips of axisymmetric fractures emanating from cylindrical holes with hydraulic fracturing under in -situ stress field and fluid pressure. These formulars,with engineering accuracy,are essentially exact. The approximation is generally accurate with - in a few percent, as demonstrated by comparison with available unmerical results. The anulytical formulas proposed here provide a fast,simple and reasonably accurate method for predicting the breakdown pressure by fracture mechanics concept and modelling the process of fracture propagation during hydraulic fracturing |
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| Keywords: | hydraulic fracturing axisymmetric fractures emanating from cylindrical holes stress intensity factor principle of superposition analytical expressions |
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