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3-D DC resistivity modeling and inversion using multi-resolution framework
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.ORCID-id: 0000-0002-7484-667x
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.ORCID-id: 0000-0002-5600-5375
University of Cologne, Köln, Germany.
Oregon State University, Corvallis, US.
2019 (engelsk)Inngår i: ASEG Extended Abstracts, ISSN 2202-0586, Vol. 1Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

We discuss the implementation of multi-resolution framework to 3-D Direct Current (DC) problem. Commonly used staggered (SG) grid fixes the horizontal grid resolution for all depths. Thus, employing the fine horizontal resolution may lead to an over-discretised forward problem, subsequently affecting the performance of the inversion. We implemented a novel multi-resolution (MR) grid approach to the 3-D DC modeling and inversion problem, which allows adjustment of the horizontal resolution with depth. By using finer resolution for the near-surface regions, MR grid can ensure the modeling accuracy and describe the shallow features in the inversion model as well. The ability to use relatively coarser horizontal resolution for the deeper regions reduces the computation costs compare to the SG grid modeling. As a result, modeling and inversion can be accelerated several times by solving a smaller problem. Our grid resembles non-conformal rectangular grid, which commonly used in finite-elements modelling.

sted, utgiver, år, opplag, sider
Taylor & Francis, 2019. Vol. 1
Emneord [en]
Direct Current Resistivity method, multi-resolution grid, modeling, inversion
HSV kategori
Forskningsprogram
Prospekteringsgeofysik
Identifikatorer
URN: urn:nbn:se:ltu:diva-77215DOI: 10.1080/22020586.2019.12073116OAI: oai:DiVA.org:ltu-77215DiVA, id: diva2:1380217
Konferanse
2nd Australian Exploration Geoscience Conference: Data to Discovery
Merknad

Godkänd;2020;Nivå 0;2020-04-22 (alebob)

Konferensartikel i tidskrift

Tilgjengelig fra: 2019-12-18 Laget: 2019-12-18 Sist oppdatert: 2020-04-22bibliografisk kontrollert

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