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Simulated Time-lapse DC-IP Monitoring of Dense Non-aqueous Phase Liquids (DNAPLs) - An Initial ApproachNormal access

Authors: C. Power, P. Tsourlos, J.I. Gerhard and T. Dahlin
Event name: 23rd European Meeting of Environmental and Engineering Geophysics
Session: Geoelectrics and Electromagnetics - Instrumentation, Theory and Applications A
Publication date: 03 September 2017
DOI: 10.3997/2214-4609.201702030
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 1.49Mb )
Price: € 20

Geoelectrical techniques have long standing potential for imaging sites contaminated by dense non-aqueous phase liquids (DNAPLs). Recent work explored the effectiveness of time-lapse DC resistivity to monitor DNAPL source zone remediation. A fundamental component of the work was the development of a unique and comprehensive linkage between well-established DNAPL and DC resistivity models, with the coupled model serving as a cost-effective and valuable investigative tool. The objective of this current study is to evaluate the application of integrated time-lapse DC resistivity and induced polarization (DC-IP) for monitoring DNAPL contamination. This paper introduces the various modelling tools and presents an initial simplistic approach to extend the established DNAPL-DC resistivity modelling framework to incorporate time-lapse IP. Preliminary results are encouraging and ongoing work is focused on developing an advanced hydraulic-electric linkage between the DNAPL and DC-IP models to produce more realistic IP responses from DNAPL spills.

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