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dc.contributor.authorHealy, D.
dc.contributor.authorNeilson, J.
dc.contributor.authorHaines, T.
dc.contributor.authorMichie, E.
dc.contributor.authorTimms, Nicholas Eric
dc.contributor.authorWilson, M.
dc.date.accessioned2017-01-30T15:10:36Z
dc.date.available2017-01-30T15:10:36Z
dc.date.created2015-10-29T04:09:13Z
dc.date.issued2015
dc.identifier.citationHealy, D. and Neilson, J. and Haines, T. and Michie, E. and Timms, N.E. and Wilson, M. 2015. An investigation of porosity-velocity relationships in faulted carbonates using outcrop analogues. Geological Society Special Publication. 406 (1): pp. 261-280.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/43850
dc.identifier.doi10.1144/SP406.13
dc.description.abstract

Porosity and permeability are notoriously difficult to predict in carbonates, especially prior to drilling when there is a lack of direct petrophysical data. The aim of this paper is to document the initial results of an integrated outcrop and laboratory study designed to investigate the relationships between pore systems and acoustic velocities in faulted Oligo-Miocene carbonates on the Mediterranean islands of Malta and Gozo. Depositional facies is shown to have a significant effect, with velocities in grain-dominated carbonates up to 1000 m s−1 higher than those in micrite-dominated carbonates. Based on outcrop structural data, the fault zones can be separated into three architectural components: a fault core; an intensely damaged zone; and a weakly damaged zone, with the last passing into undamaged protolith. Our data suggest that only the fault core component can be identified using porosity–velocity data, with P-wave velocity (Vp) values of 5000–6500 m s−1 at helium porosities of less than 5%. Our study is novel in that the prediction of elastic properties and acoustic velocities across fault zones is anticipated by linking laboratory-scale measurements with seismic-scale predictions through quantitative rock physics modelling.

dc.publisherGeological Society of London
dc.titleAn investigation of porosity-velocity relationships in faulted carbonates using outcrop analogues
dc.typeJournal Article
dcterms.source.volume406
dcterms.source.number1
dcterms.source.startPage261
dcterms.source.endPage280
dcterms.source.issn0305-8719
dcterms.source.titleGeological Society Special Publication
curtin.departmentDepartment of Applied Geology
curtin.accessStatusFulltext not available


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