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When do fractures initiate during the geological history of a sedimentary basin? Test case of a loading-fracturing path methodology
Journal of Structural Geology ( IF 3.1 ) Pub Date : 2022-09-15 , DOI: 10.1016/j.jsg.2022.104683
Jean-Pierre Petit, Alexandre I. Chemenda, Daniel Minisini, Pascal Richard, Steven C. Bergman, Michael Gross

We propose a methodology to determine the initiation and reactivation of fracturing during the geological history of a sedimentary basin. The data input is derived from the Eagle Ford unconventional play (Texas, USA) and includes stratigraphy, burial and exhumation, tectonic regimes, regional fractures and faults, in situ stresses, and present-day mechanical properties of rocks. Based on this dataset and mechanical simulations, we build a stress history (the loading path). Using this path and simple criteria for the tensile and shear failure, we evaluate the temporal intervals when fracturing is possible during the geological history of a sedimentary basin for different scenarios of the associated strength evolution of its material. We conclude that most probably fracturing is initiated in early (shallow) burial conditions, at a post-compaction stage, with no or limited overpressure, when the cohesion of the material is still low.



中文翻译:

在沉积盆地的地质历史中,裂缝何时开始?加载-压裂路径方法的测试用例

我们提出了一种方法来确定沉积盆地地质历史期间压裂的开始和重新激活。数据输入来自 Eagle Ford 非常规油气田(美国德克萨斯州),包括地层、埋藏和折返、构造状态、区域裂缝和断层,原位应力和现今岩石的力学性质。基于这个数据集和机械模拟,我们建立了一个应力历史(加载路径)。使用这条路径和拉伸和剪切破坏的简单标准,我们评估了在沉积盆地的地质历史期间,在其材料相关强度演变的不同情况下可能发生压裂的时间间隔。我们的结论是,压裂很可能是在早期(浅)埋藏条件下开始的,在压实后阶段,没有或有限的超压,此时材料的内聚力仍然很低。

更新日期:2022-09-15
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