不同岩性单元的微震活动水平往往存在差异，有些地层基本平静，没有任何微震活动。由于与微震活动相关的剪切激活变形取决于地层的地质力学性质和天然结构，因此某些地层中微震活动的缺失可能或不可能指示水力裂缝几何形状的变化。本研究将微震观测与应变和其他观测相结合，以研究不同岩石类型微震响应与底层水力裂缝几何形状的关系。
本文将不同环境下的微地震活动与独立的应变和压力数据相结合，以研究微地震平静层的地质力学性质。完整的论文首先描述了犹他州尤因塔盆地瓦萨奇组和绿河组的一个综合案例研究，该研究整合了微地震监测、低频分布式声波传感 (DAS) 和压力观测，以全面研究水力裂缝的扩展。
Microseismicity levels tend to vary from one lithological unit to the next, with some layers being predominantly quiet and lacking any microseismicity. Because shear-activated deformation associated with microseismicity will depend on the geomechanical properties and natural fabric of the formation, the lack of microseisms in certain layers may or may not be indicative of a change in the hydraulic fracture geometry. In this work, microseismic observations are integrated with strain and other observations to investigate the microseismic response in relation to the underlying hydraulic fracture geometry for different rock types.
In this paper, microseismicity from different settings is integrated with independent strain and pressure data to investigate the geomechanical nature of microseismically quiet layers. In the complete paper, a comprehensive case study is first described in the Wasatch and Green River formations of the Uinta Basin in Utah that integrated microseismic monitoring, low-frequency distributed acoustic sensing (DAS), and pressure observations for a complete investigation into hydraulic fracture growth.
