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Marine ERT Modelling for the Detection of Fracture ZonesNormal access

Authors: P.I. Tsourlos, G.A. Tassis and J.S. Rønning
Event name: Near Surface Geoscience 2013 - 19th EAGE European Meeting of Environmental and Engineering Geophysics
Session: Geophysics in Engineering Geology (P)
Publication date: 09 September 2013
DOI: 10.3997/2214-4609.20131398
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 764.35Kb )
Price: € 20

Summary:
The applicability of marine ERT surveys into the detection of underwater fracture zones is studied in this work. Various marine fracture zones models and measuring modes were tested using synthetic data which were subsequently subjected to inversion. In particular factors such as the effect of the sea water layer, the resistivity contrast, the overburden layer in both floating and submerged electrode modes are examined and compared. Among others, results indicate that the exact inclusion of the water layer into the inversion models is extremely important and that ERT surveys can be successful only for the first 10 meters of sea water.


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