Long-term seismic monitoring of reservoir dynamics at Decatur

B. P. Goertz-Allmann, B. D.E. Dando, N. Langet, A. M. Dichiarante, D. Kühn, V. Oye, M. Jordan, S. Williams-Stroud, R. Bauer, S. Greenberg

Research output: Contribution to conferencePaperpeer-review

Abstract

Accurate estimation of the moment magnitude of microseismic event catalogs is essential for proper estimation of moment release as well as for the extraction of source parameters that can reveal variations in the reservoir geomechanics and hydraulic properties. Using Decatur as an example we present how an improper choice of the analysis bandwidth and lack of instrument correction can lead to an underestimation of larger magnitudes which may affect the functionality of traffic light protocols. Spatial variations of Gutenberg's b-value within selected seismicity clusters at Decatur are associated with seismicity migrating over time along the cluster orientations, suggesting differences in either the medium or fault properties and changes in pore pressure. The different b-value regions are supported by clear systematic difference in frequency-magnitude distributions.

Original languageEnglish (US)
StatePublished - 2021
Event15th Greenhouse Gas Control Technologies Conference, GHGT 2021 - Virtual, Online, United Arab Emirates
Duration: Mar 15 2021Mar 18 2021

Conference

Conference15th Greenhouse Gas Control Technologies Conference, GHGT 2021
Country/TerritoryUnited Arab Emirates
CityVirtual, Online
Period3/15/213/18/21

Keywords

  • b-value
  • frequency-magnitude distribution
  • magnitude saturation
  • microseismic
  • moment magnitude

ASJC Scopus subject areas

  • General Energy
  • Industrial and Manufacturing Engineering
  • Management, Monitoring, Policy and Law
  • Pollution

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