论文标题
关于液压裂缝力学的注释
Notes on Hydraulic Fracture Mechanics
论文作者
论文摘要
这些说明涉及传播液压骨折（HF）的机制。在第一部分中，我们专注于不同的物理机制（流体和固体中的耗散，裂缝中的流体储存及其与可渗透岩石的交换，裂纹弹性）在裂缝尖端附近表现出来，并导致裂缝传播方案的“动物园”，因为与主要机制的不同耦合依赖于物质参数和实质性参数的相对应相对应。在第二部分中，我们说明了如何决定由裂缝中心在裂缝中心注入的流体注射驱动的简单几何裂缝（例如2D平面 - 晶体或3D径向裂纹）的有限裂缝的传播。这些注释不是对该主题的研究的回顾，在过去的20年左右的时间里，它引起了极大的新兴趣（有关评论，请参见例如Detournay [2016]）；而是尝试以一种简单且充满希望的方式引入HF的力学和物理学，从骨折尖端到有限的断裂传播。
These notes address the mechanics of propagating hydraulic fractures (HF). In the first part, we focus on how different physical mechanisms (dissipation in fluid and solid, fluid storage in fracture and its exchange with permeable rock, crack elasticity) manifest near the fracture tip and lead to a `zoo' of fracture propagation regimes, as correspond to the different coupling of predominant mechanisms depending on material parameters and fracture propagation speed. In the second part, we illustrate how different near-tip regimes dictate the propagation of finite fractures of simple geometries (e.g. 2D plane-strain, or 3D radial cracks) driven by fluid injection at the center of the crack. These notes are not a review of the research on the topic, which has seen tremendous renewed interest in the last 20 years or so, (for a review see, e.g., Detournay [2016]); but rather an attempt to introduce the mechanics and physics of HF in a simple and hopefully-logical way, from the fracture tip to finite fracture propagation.
