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Main Title: Near‐surface fault detection using high‐resolution shear wave reflection seismics at the CO2CRC Otway Project site, Australia
Author(s): Beilecke, Thies
Krawczyk, Charlotte M.
Ziesch, Jennifer
Tanner, David C.
Type: Article
Language Code: en
Abstract: High‐resolution, near‐surface, shear wave reflection seismic measurements were carried out in November 2013 at the CO2CRC Otway Project site, Victoria, Australia, with the aim to determine whether and, if so, where deeper faults reach the near subsurface. From a previous P wave 3‐D reflection seismic data set that was concentrated on a reservoir at 2 km depth, we can only interpret faults up to 400 m below sea level. For the future monitoring in the overburden of the CO2 reservoir it is important to know whether and how the faults continue in the subsurface. We prove that two regional fault zones do in fact reach the surface instead of dying out at depth. Individual first‐break signatures in the shot gathers along the profiles support this interpretation. However, this finding does not imply perforce communication between the reservoir and the surface in the framework of CO2 injection. The shear wave seismic sections are complementary to existing P wave volumes. They image with high resolution (better than 3 m vertically) different tectonic structures. Similar structures also outcrop on the southern coast of the Otway Basin. Both the seismic and the outcrops evidence the complex youngest structural history of the area.
Issue Date: 28-Jul-2016
Date Available: 24-May-2018
DDC Class: 550 Geowissenschaften, Geologie
Subject(s): shear wave
reflection seismic
near surface
high resolution
Otway Basin
Sponsor/Funder: BMBF, 03G0797A, Verbundprojekt UR VI: PROTECT; Vorhersage von Deformation für eine abgesicherte Speicherung von Kohlenstoff (PRediction Of deformation To Ensure Carbon Traps); Vorhaben: Subseismische Deformationsvorhersage potentieller Wegsamkeiten und ihre seismische Validierung - Sonderprogramm GEOTECHNOLOGIEN
Journal Title: Journal of Geophysical Research: Solid Earth
Publisher: American Geophysical Union
Publisher Place: Washington, DC
Volume: 121
Issue: 9
Publisher DOI: 10.1002/2015JB012668
Page Start: 6510
Page End: 6532
ISSN: 2169-9313
Appears in Collections:FG S-Geophysikalisches Processing mit Schwerpunkt Seismik » Publications

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