Abstract This study investigates the relationship between Young's modulus (static (Es) and dynamic (Ed)) generated from triaxial test and its reduced form (E*) derived from impulse hammer measurements. The sensitivity of E* to sample weight, length, diameter, and lithology were also documented. A total of 100 core plugs covering over 800 ft of Paleozoic tight sands interval and shale reservoirs were analyzed using well-established geochemical and mechanical methods. Strong correlations were observed between the E* and other mechanical properties measured. However, compared to Es and Ed derived from triaxial test, E* from impulse hammer reveals detailed geomechanical heterogeneity and anisotropy. Sample mineralogy and grain size variabilities considerably influence the E*. For a better upscaling of the reservoir model parameters, we generated a continuous geomechanical profile from the laboratory measurements. The results show marked contrasts in rock mechanical facies, consistent with mechanical/energy barrier mechanism. We documented toughness/modulus and interface barriers within the studied Paleozoic tight sands and shale reservoirs. These mechanical facies are important considerations for drilling and stimulation designs. They can cause wellbore instability and behave as barriers to hydraulic fracture height growth. The knowledge of elastic properties of rocks is crucial to geomechanical modeling throughout the life cycle of an asset. As such, the findings of this paper will potentially help to resolve the difficulties that are associated with geomechanical characterization and model calibration of highly laminated unconventional reservoirs using laboratory-generated data. In such vertically discontinuous reservoirs, the relative thickness of intercalated stiff and weak mechanical layers in conjuction with the stress barriers determine how far the hydraulic fracture propagation will grow in height.

中文翻译：

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非常规岩石弹性特性剖面及地质力学表征

摘要 本研究调查了由三轴试验产生的杨氏模量（静态 (Es) 和动态 (Ed)）与其从脉冲锤测量得出的简化形式 (E*) 之间的关系。还记录了 E* 对样品重量、长度、直径和岩性的敏感性。使用成熟的地球化学和机械方法分析了覆盖超过 800 英尺的古生界致密砂岩层段和页岩储层的总共 100 个岩心塞。在 E* 和其他测量的机械性能之间观察到很强的相关性。然而，与来自三轴试验的 Es 和 Ed 相比，脉冲锤的 E* 揭示了详细的地质力学非均质性和各向异性。样品矿物学和粒度变化对 E* 有很大影响。为了更好地放大储层模型参数，我们从实验室测量中生成了一个连续的地质力学剖面。结果显示岩石力学相的显着对比，与机械/能量屏障机制一致。我们记录了所研究的古生代致密砂岩和页岩储层中的韧性/模量和界面屏障。这些机械相是钻井和增产设计的重要考虑因素。它们会导致井眼不稳定，并成为水力压裂高度增长的障碍。岩石弹性特性的知识对于资产整个生命周期的地质力学建模至关重要。因此，本文的发现将有可能帮助解决与使用实验室生成的数据对高度层状非常规储层进行地质力学表征和模型校准相关的困难。在这种垂直不连续的储层中，插入的刚性和弱机械层的相对厚度与应力屏障相结合，决定了水力压裂扩展的高度。