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Lateral Range Issue in ERT - Analogue Modelling with 2D and Quasi-3D InversionNormal access

Authors: P. Ułasiewicz and M. Ziobro
Event name: 80th EAGE Conference and Exhibition 2018
Session: Student Poster: Near Surface Other
Publication date: 11 June 2018
DOI: 10.3997/2214-4609.201801735
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 498.42Kb )
Price: € 20

Summary:
The goal of this paper was to examine the distortions caused by bodies out of profile line in Electrical Resistivity Tomography (ERT) survey. Analogue modelling with Wenner array was applied. Results of 2D inversion has proven to be highly affected by lateral range issue, while quasi-3D inversion was significantly less distorted. For surveys conducted in vicinity to resistive body high amplitude anomaly was observed. When resistive body was four times the electrode spacing away from the survey line the 2D inversion was not significantly affected by the body's presence. For quasi-3D inversion there were no significant false anomalies observed.


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