Assessment of dynamic material properties of intact rocks using seismic wave attenuation: an experimental study

The mechanical properties of any substance are essential facts to understand its behaviour and make the maximum use of the particular substance. Rocks are indeed an important substance, as they are of significant use in the energy industry, specifically for fossil fuels and geothermal energy. Attenuation of seismic waves is a non-destructive technique to investigate mechanical properties of reservoir rocks under different conditions. The attenuation characteristics of five different rock types, siltstone, shale, Australian sandstone, Indian sandstone and granite, were investigated in the laboratory using ultrasonic and acoustic emission instruments in a frequency range of 0.1–1 MHz. The pulse transmission technique and spectral ratios were used to calculate the attenuation coefficient (α) and quality factor (Q) values for the five selected rock types for both primary (P) and secondary (S) waves, relative to the reference steel sample. For all the rock types, the attenuation coefficient ...

任何物质的力学性能都是理解其行为特性并实现其最大利用价值的关键属性。岩石作为一类重要地质材料，在能源产业中应用广泛，尤其在化石燃料与地热能开发领域发挥着核心作用。地震波衰减是一种无损检测技术，可用于探究不同工况下储集层岩石的力学特性。本研究在实验室环境下，采用超声与声发射仪器，针对粉砂岩、页岩、澳大利亚砂岩、印度砂岩及花岗岩这五种岩石类型，在0.1~1 MHz的频率范围内开展了衰减特性研究。本研究采用脉冲透射法与频谱比法，以参考钢样为基准，针对五种受试岩石的纵波（P波）与横波（S波），分别计算了其衰减系数（α）与品质因数（Q）值。针对所有受试岩石类型，其衰减系数……