MIT Libraries logoDSpace@MIT

MIT
View Item 
  • DSpace@MIT Home
  • Earth Resources Laboratory
  • ERL Industry Consortia Technical Reports
  • View Item
  • DSpace@MIT Home
  • Earth Resources Laboratory
  • ERL Industry Consortia Technical Reports
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Analysis of location uncertainty for a microearthquake cluster: A case study

Author(s)
Melo, Gabriela; Malcolm, Alison E.; Poliannikov, Oleg V.; Fehler, Michael
Thumbnail
DownloadMelo_etal_Analysis_of _Location.pdf (3.127Mb)
Other Contributors
Massachusetts Institute of Technology. Earth Resources Laboratory
Metadata
Show full item record
Abstract
In many reservoirs, an increase in permeability and conductivity is achieved by hydraulic fracturing/stimulations which open cracks and fractures that then act as pathways for fluids to navigate in the subsurface. Mapping, localization, and general characterization of these fracture systems is of key importance in oil, gas, and geothermal energy production. The location of the microseismic events triggered during hydraulic fracturing or stimulation can help to characterize the properties of the fracture system. There are many different methods for localizing microearthquakes and, in general, these methods yield different locations, velocity models, and event origin times, due to differences in algorithms and input models. Here we focus on studying location confidence intervals associated with two localization methods, classical (triangulation) and Double-Difference, where uncertainties due to origin times can be marginalized away, thus decreasing uncertainties in the event locations. We relocate events using these two methods and three different velocity models. Of the two methods used here, Double-Difference produces smallest confidence regions. We also illustrate that, for our dataset in particular, marginalizing away the influence of the unknown origin times also improves the confidence intervals.
Date issued
2013
URI
http://hdl.handle.net/1721.1/90520
Publisher
Massachusetts Institute of Technology. Earth Resources Laboratory
Series/Report no.
Earth Resources Laboratory Industry Consortia Annual Report;2013-15
Keywords
Microseismic, Inversion, Interferometry

Collections
  • ERL Industry Consortia Technical Reports

Browse

All of DSpaceCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

My Account

Login

Statistics

OA StatisticsStatistics by CountryStatistics by Department
MIT Libraries
PrivacyPermissionsAccessibilityContact us
MIT
Content created by the MIT Libraries, CC BY-NC unless otherwise noted. Notify us about copyright concerns.