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dc.contributor.authorFjær, Erling
dc.date.accessioned2020-12-23T11:09:02Z
dc.date.available2020-12-23T11:09:02Z
dc.date.created2018-10-09T14:50:00Z
dc.date.issued2019
dc.identifier.citationGeophysical Prospecting. 2019, 67 (1), 128-139.en_US
dc.identifier.issn0016-8025
dc.identifier.urihttps://hdl.handle.net/11250/2720922
dc.description.abstractStatic moduli of rocks are usually different from the corresponding dynamic moduli. The ratio between them is generally complex and depends on several conditions, including stress state and stress history. Different drainage conditions, dispersion - often associated with pore fluid effects – heterogeneities and strain amplitude are all potential reasons for this discrepancy. Moreover, comparison of static and dynamic moduli is often hampered and maybe mistaken due to insufficient characterization of anisotropy. This paper gives a review of the various mechanisms causing differences between static and dynamic moduli. By careful arrangements of test conditions, it is possible to isolate the mechanisms so that they can be studied separately. Non-elastic deformation induced by the large static strain amplitudes is particularly challenging, however a linear relationship between non-elastic compliance and stress makes it possible to eliminate also this effect by extrapolation to zero strain amplitude. To a large extent, each mechanism can be expressed mathematically with reasonable precision, thus quantitative relations between the moduli can be established. This provides useful tools for analyses and prediction of rock behavior. For instance, such relations may be used to predict static stiffness and even strength based on dynamic measurement. This is particularly useful in field situations where only dynamic data are available. Further, by utilizing the possibility for extrapolation of static measurements to zero strain amplitude, dispersion in the range from seismic to ultrasonic frequencies may be studied by a combination of static and dynamic measurements.en_US
dc.language.isoengen_US
dc.publisherWileyen_US
dc.subjectStatic and dynamic modulien_US
dc.subjectDispersionen_US
dc.titleRelations between Static and Dynamic Moduli of Sedimentary Rocksen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.versionacceptedVersionen_US
dc.rights.holderThis is the peer reviewed version of an article, which has been published in final form at [https://doi.org/10.1111/1365-2478.12711]. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.en_US
dc.source.pagenumber128-139en_US
dc.source.volume67en_US
dc.source.journalGeophysical Prospectingen_US
dc.source.issue1en_US
dc.identifier.doi10.1111/1365-2478.12711
dc.identifier.cristin1619081
dc.relation.projectNorges forskningsråd: 234074en_US
cristin.unitcode7401,80,7,0
cristin.unitnamePetroleum
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.fulltextoriginal
cristin.qualitycode1


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