Pytharouli, Stella and Lunn, Rebecca and Shipton, Zoe and Kirkpatrick, James and do Nascimento, Aderson (2011) Microseismicity illuminates open fractures in the shallow crust. Geophysical Research Letters, 38. ISSN 0094-8276Full text not available in this repository. (Request a copy from the Strathclyde author)
Successful delivery of geological carbon storage and/or radioactive waste disposal relies on the ability to predict the transport of waste stored/disposed of at depth, over 103 to 106 years. Field evidence shows that faults and fractures can act as focused pathways for contaminant migration. Hence, transport predictions require detailed characterization of fracture location, orientation and hydraulic properties. We show that microseismic monitoring can delineate the three‐dimensional structure and hydraulic characteristics of flowing fractures at 2 to 3 km depth. Individual fracture planes are validated by independently derived composite focal mechanisms. Local field observations confirm the presence of open fractures with lengths and orientations matching the seismically‐derived fracture planes. The temporal evolution of seismicity within individual fractures allows us to estimate depth‐averaged transmissivity and in‐plane fluid velocity distributions. Our results demonstrate the potential of microseismic monitoring to characterize flowing fractures, for non‐invasive site investigation at CO2 and radioactive waste storage/disposal sites.
|Keywords:||shallow crust, radioactive waste disposal , geological carbon storage , microearthquakes, geophysics, fractures, Engineering (General). Civil engineering (General), Geophysics, Earth and Planetary Sciences(all)|
|Subjects:||Technology > Engineering (General). Civil engineering (General)|
|Department:||Faculty of Engineering > Civil and Environmental Engineering|
|Depositing user:||Pure Administrator|
|Date Deposited:||07 Mar 2011 23:23|
|Last modified:||27 Apr 2016 16:19|