Micromechanical characterisation of overburden shales in the Horn River Basin through nanoindentation
Micromechanical characterisation of overburden shales in the Horn River Basin through nanoindentation
复制标题
通过纳米压痕技术表征霍恩河流域上覆页岩的微观力学特征
DOI：
10.1088/1755-1315/1124/1/012087
复制
发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Charlton T
中科院分区：
文献类型：
--
作者：
Charlton T
本文介绍了辛普森堡页岩的微观力学特征，该页岩覆盖了加拿大西北部霍恩河流域的非常规产气岩性。辛普森堡地层富含粘土，在底层储层水力压裂事件期间记录的微震数据表明，该地层是裂缝发育的屏障，具有明显的各向异性地震响应。由岩心碎片制备样品，并使用 X 射线衍射、压汞孔隙率测定法和扫描电子显微镜 (SEM) 表征页岩的成分和结构。纳米压痕测试用于获得页岩微观结构在颗粒尺度上的机械响应。在网格图案上进行压痕，并将样品定向为平行和垂直于层理平面，以评估固有的机械各向异性。还通过 SEM/EDS（能量色散 X 射线光谱）对网格进行化学分析，并使用耦合的化学机械数据通过统计聚类程序来表征页岩的材料相。结果表明，辛普森堡页岩主要由软粘土相组成，具有强各向异性弹性刚度，以及较硬但有效各向同性的石英和长石颗粒。还应用了简单的放大方案将颗粒尺度弹性刚度与现场尺度微震数据联系起来。
The paper presents a micromechanical characterisation of Fort Simpson shale, which overlies unconventional gas-producing lithologies in the Horn River Basin, NW Canada. The Fort Simpson formation is clay-rich and microseismic data recorded during hydraulic fracturing events in the underlying reservoir has shown the formation acts as a barrier to fracture development, with a notably anisotropic seismic response. Samples were prepared from core fragments and the composition and texture of the shale was characterised using X-ray diffraction, mercury injection porosimetry and scanning electron microscopy (SEM). Nanoindentation testing was used to obtain the mechanical response of the shale microstructure, at grain-scale. The indentation was conducted on a grid pattern and samples were oriented both parallel and perpendicular to the bedding plane to assess the inherent mechanical anisotropy. Chemical analysis of the grids was also undertaken through SEM/EDS (energy dispersive X-ray spectroscopy) and the coupled chemo-mechanical data was used to characterise the material phases of the shale through a statistical clustering procedure. The results show that Fort Simpson shale broadly consists of a soft clay phase, with strongly anisotropic elastic stiffness, and stiffer but effectively isotropic grains of quartz and feldspar. A simple upscaling scheme was also applied to link the grain-scale elastic stiffness to the field-scale microseismic data.
页岩地震各向异性：微震数据反演
DOI：
--
发表时间：
2014
期刊：
影响因子：
--
作者：
Changpeng Yu;S. Shapiro
通讯作者：
S. Shapiro
根据直井和斜井声波测井估算霍恩河流域的各向异性
影响因子：
3.3
作者：
C. Sayers;L. D. Boer;S. Dasgupta;B. Goodway
通讯作者：
B. Goodway