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Weger et al 2009 aapgbull See discussions stats and author pro ?les for this publication at https www researchgate net publication Quanti ?cation of pore structure and its e ?ect on sonic velocity and permeability in carbonates Article in AAPG Bulletin Oc

See discussions stats and author pro ?les for this publication at https www researchgate net publication Quanti ?cation of pore structure and its e ?ect on sonic velocity and permeability in carbonates Article in AAPG Bulletin October DOI CITATIONS authors including Ralf J Weger University of Miami PUBLICATIONS CITATIONS SEE PROFILE Gregor Baechle Repsol Houston USA PUBLICATIONS CITATIONS SEE PROFILE READS Gregor P Eberli University of Miami PUBLICATIONS CITATIONS SEE PROFILE Jose Luis Massaferro YPF PUBLICATIONS CITATIONS SEE PROFILE Some of the authors of this publication are also working on these related projects The Tropical Ostracod Record of The Maldives and its Paleoceanographic Implications View project Maldives Monsoon Sea Level and Currents View project All content following this page was uploaded by Gregor P Eberli on April The user has requested enhancement of the downloaded ?le CGEOHORIZONS Quanti ?cation of pore structure and its e ?ect on sonic velocity and permeability in carbonates Ralf J Weger Gregor P Eberli Gregor T Baechle Jose L Massaferro and Yue-Feng Sun ABSTRACT Carbonate rocks commonly contain a variety of pore types that can vary in size over several orders of magnitude Traditional pore-type classi ?cations describe these pore structures but are inadequate for correlations to the rock ? s physical properties We introduce a digital image analysis DIA method that produces quantitative pore-space parameters which can be linked to physical properties in carbonates in particular sonic velocity and permeability The DIA parameters derived from thin sections capture two- dimensional pore size DomSize roundness g aspect ratio AR and pore network complexity PoA Comparing these DIA parameters to porosity permeability and P-wave velocity shows that in addition to porosity the combined e ?ect of microporosity the pore network complexity and pore size of the macropores is most in uential for the acoustic behavior Combining these parameters with porosity improves the coe ?cient of determination R velocity estimates from to The analysis shows that samples with large simple pores and a small amount of microporosity display higher acoustic velocity at a given porosity than samples with small complicated pores Estimates of permeability from porosity alone are very ine ?ective R but can be improved when pore geometry information PoA R and DomSize R are incorporated Furthermore results from the correlation of DIA parameters to acoustic data reveal that intergrain and or intercrystalline Copyright ? The American Association of Petroleum Geologists All rights reserved Manuscript received January provisional acceptance March revised manuscript received May ?nal acceptance May DOI AAPG Bulletin v no October pp ?? AUTHORS Ralf J Weger University of Miami Rosenstiel School of Marine and Atmospheric Science Division of Marine Geology and Geophysics Rickenbacker Causeway Miami Florida rweger rsmas miami edu Ralf J Weger was a postdoctoral researcher with the Comparative Sedimentology Laboratory at the University of Miami when the article was written He received his B S degree in systems analysis and his Ph D in marine geology and geophysics from the University of Miami His dissertation focuses on quantitative pore- and rock-type