Tectonic regime controls clustering of deformation bands in porous sandstone
| Autor: | Roger Soliva, Sven Philit, Haakon Fossen, Gregory Ballas |
|---|---|
| Přispěvatelé: | Géosciences Montpellier, Institut national des sciences de l'Univers (INSU - CNRS)-Université de Montpellier (UM)-Université des Antilles (UA)-Centre National de la Recherche Scientifique (CNRS), University of Bergen (UiB) |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
[SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics
Capillary pressure porous sandstone 010504 meteorology & atmospheric sciences Geology 010502 geochemistry & geophysics 01 natural sciences Physics::Geophysics Tectonics Permeability (earth sciences) Fluid dynamics Deformation bands Petrology Cluster analysis Anisotropy Porosity Geomorphology 0105 earth and related environmental sciences |
| Zdroj: | Geology Geology, Geological Society of America, 2016, 44 (6), pp.423-426. ⟨10.1130/G37585.1⟩ Geology (0091-7613) (Geological Soc Amer, Inc), 2016-06, Vol. 44, N. 6, P. 423-426 |
| ISSN: | 0091-7613 |
| DOI: | 10.1130/G37585.1⟩ |
| Popis: | International audience; Porous sandstones tend to deform by the formation of low-permeability deformation bands that influence fluid flow in reservoir settings. The bands may be distributed or localized into clusters, and limited recent data suggest that tectonic regime may exert control on their distribution and clustering. In order to explore this suggestion, we performed a synthetic analysis based of 73 sets of bands, including 22 new sets measured for a reverse Andersonian regime that fill the important gap in data for this context. We find a surprisingly strong correlation between clustering and tectonic regime, where bands clearly are more distributed in the reverse regime compared to the normal regime. Together with the observed band distributions, capillary pressure data show evidence that efficient membrane seals are expected for extension, whereas pervasive permeability anisotropy is expected for contraction. Such a basic new rule concerning tectonic regime is very useful for assessment of reservoir properties where deformation bands are common but below seismic resolution. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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