Using 2-D and 3-D georadar to characterize karst collapse as a basis for high-resolution reservoir-analogue models

Bjørn H. Heincke, Jan S. Rønning, Einar Dalsegg, Karoline Bælum, Walter Wheeler, Hege C. Nordeide

Publikation: Bidrag til bog/rapport/konferenceproceedingsKonferenceartikel i proceedingspeer review

Resumé

Paleokarst collapse-breccias are known to significantly influence fluid flow in carbonate rocks in aquifers and hydrocarbon reservoirs. However, few 3D studies of breccia-pipe properties exist and more detailed knowledge about these structures can help to improve present-day fluid-flow models. To investigate collapse breccias which crop out on the Wordikammen plateau (Spitzbergen), we performed both extended 2-D and 3-D georadar measurements achieving 40 m penetration. From the grid of 2-D sections we determined the spatial distribution and sizes of collapse bodies characterized by complex diffraction patterns interrupting bedding-related continuous reflections. Images of the 3-D survey enabled us to determine accurately the actual shape of one breccia pipe. Comparison with electrical resistance tomography (ERT) shows that the breccia pipes coincide with regions of both anomalously-high and -low resistivities. This may indicate that breccia pipes can act as flowpaths for water in the permafrost
OriginalsprogEngelsk
TitelProceedings of the 12th International Conference on Ground Penetrating Radar, GPR08 : 15-19 June 2008, Birmingham, UK
RedaktørerC.D.F. Rogers, R.J. Chignell
UdgivelsesstedBirmingham
ForlagUniversity of Birmingham
Antal sider6
StatusUdgivet - 2008
Udgivet eksterntJa
Begivenhed12th International Conference on Ground Penetrating Radar - Birmingham, United Kingdom
Varighed: 16 jun. 200819 jun. 2008

Konference

Konference12th International Conference on Ground Penetrating Radar
ByBirmingham, United Kingdom
Periode16/06/0819/06/08

Programområde

  • Programområde 3: Energiressourcer

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