Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2021GL093986 |
Measuring Fault Zone and Host Rock Hydraulic Properties Using Tidal Responses | |
H. Guo; E. E. Brodsky; T. H.W. Goebel; T. T. Cladouhos | |
2021-06-26 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2021 |
英文摘要 | Pore pressure diffusion along faults influences induced seismicity and rupture mechanics. In situ hydraulic diffusivity measurements along faults are rare and generally lower than inferred from seismicity migration. Here we use the tidal response of deep geothermal boreholes to measure fault diffusivity and permeability. Initial interpretations of the observation with a homogeneous confined aquifer model result in diffusivities of 10-3-10-1 m2/s. However, this model mixes signals from both the conduit and the host rock. We develop a model for tidal response with a fault passing through the aquifer based on the fault-guided fracture network and solve for hydraulic properties in both the fault and the host rock. The resulting fault permeability is 2×10-14-7×10-14 m2 (90% CI) and fault diffusivity is 0.08-0.33 m2/s (90% CI), which is 2 orders of magnitude higher than the host rock diffusivity in some wells, thus highlighting the role of faults as fluid conduits. |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/333664 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | H. Guo,E. E. Brodsky,T. H.W. Goebel,et al. Measuring Fault Zone and Host Rock Hydraulic Properties Using Tidal Responses[J]. Geophysical Research Letters,2021. |
APA | H. Guo,E. E. Brodsky,T. H.W. Goebel,&T. T. Cladouhos.(2021).Measuring Fault Zone and Host Rock Hydraulic Properties Using Tidal Responses.Geophysical Research Letters. |
MLA | H. Guo,et al."Measuring Fault Zone and Host Rock Hydraulic Properties Using Tidal Responses".Geophysical Research Letters (2021). |
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