Dienstag, 21. März 2023, 16:30 - 18:00 iCal
Vortrag von Leo EISNER
(Seismik s.r.o. Prague)
"Mapping pore pressure with beach balls (2023 SEG Honorary Lecturer)"
Vortrag im Rahmen des Meteorologisch-Geophysikalischen Kolloquiums.
To the online talk click here: univienna.zoom.us/j/66942796112
HS 3 und online
Josef-Holaubek-Platz 2, UZA 2, 1090 Wien
Vortrag
Abstract: Stress field of the Earth's crust has been studied for many decades as a part of seismology and geomechanics. Traditional stress inversion methods utilize focal mechanisms of earthquakes as this is typically the only data available at regional scale and lower crust. With earthquake mechanisms, it's possible to reconstruct principal stress directions and a ratio of principal stress magnitudes, but not the full stress tensor. However, a combination of data from reservoir injections and focal mechanisms from induced microseismicity overcomes this limitation. Various reservoir data, such as the temporal dependency of injection pressure, density logs, and in situ stress measurements, complement microseismic data and allow to reconstruct the full stress tensor: stress orientation and principal stress magnitudes. A joint-inversion technique that combines different data from various depths may also account for stress variations with depth and reconstruct vertical stress gradient tensor. Ultimately, the full stress tensor together with the focal mechanisms provide an estimate of pore pressure at the location of every event, which can be mapped in time and space. I will show how we applied joint stress inversion to a geothermal and unconventional dataset and illustrate how microseismicity can be used to map pore pressure.
To the online talk click here: univienna.zoom.us/j/66942796112
Zur Webseite der Veranstaltung
Veranstalter
Institut für Meteorologie und Geophysik
Kontakt
Andreas Plach/Herta Gassner
Institut für Meteorologie und Geophysik
53735
img-wien@univie.ac.at
Erstellt am Dienstag, 14. März 2023, 10:02
Letzte Änderung am Montag, 20. März 2023, 12:17