Hydraulic Fracture Propagation in the Presence of Planes of Weakness
Hydraulic Fracture Propagation in the Presence of Planes of Weakness
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DOI：
10.2118/4852-ms
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发表时间：
1974
期刊：
影响因子：
6.1
通讯作者：
A. A. Daneshy-A.
中科院分区：
文献类型：
--
作者：
A. A. Daneshy-A.
对含天然缺陷地层的水力压裂进行了研究。这3个重要因素是弱面的强度、弱面相对于最小压缩主应力的方向以及主应力幅值之间的差异。与诱导的水力压裂相比，尺寸较小的材料缺陷被证明无法改变水力压裂的总体方向。诱导断裂可包围此类材料缺陷并克服其可能的影响。即使没有，这些缺陷的影响也是局部的，对压裂处理的结果影响不大。大的材料缺陷不能彻底改变断裂方向。文中给出的分析结果是基于最小阻力原理的。该研究不包括严重断裂的高渗透性地层。
A study is made of hydraulic fracturing of formations containing natural flaws. The 3 factors of importance are shown to be the strength of the weakness plane, its orientation with respect to the least compressive principal stress, and the difference between the principal stress magnitudes. Material flaws with dimensions that are small compared with the induced hydraulic fracture are shown to be unable to change the overall orientation of the hydraulic fracture. The induced fracture can encircle such material defects and override their possible effect. Even if it does not, the influence of these flaws is local and insignificant on the results of the fracturing treatment. Large material flaws are shown unable to drastically change fracture orientation. The analytical results presented in the paper are based on the principle of least resistance. The study does not include severely fractured, highly permeable formations.