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dc.contributor.authorNarongsirikul, Sirikarn
dc.contributor.authorMondol, Nazmul Haque
dc.contributor.authorJahren, Jens
dc.date.accessioned2019-11-25T07:37:58Z
dc.date.available2019-11-25T07:37:58Z
dc.date.created2019-11-11T09:39:37Z
dc.date.issued2019
dc.identifier.citationGeophysical Prospecting. 2019, .
dc.identifier.issn0016-8025
dc.identifier.urihttp://hdl.handle.net/11250/2630161
dc.description.abstractRelationship between different geomechanical and acoustic properties measured from seven laboratory tested unconsolidated natural sands with different mineralogical compositions and textures were presented. The samples were compacted in the uniaxial strain configuration from 0.5 up to 30 MPa effective stress. Each sand sample was subjected to three loading – unloading cycles to study the influence of stress reduction. Geomechanical, elastic, and acoustic parameters are different between normal compaction and overconsolidation (unloaded and reloaded). Stress path (K0) data differs between normal consolidated and overconsolidated sediments. The K0 value of approximately 0.5 is founded for most of the normal consolidated sands, but varies during unloading depending on mineral compositions and textural differences. The K0 and Overconsolidation Ratio (OCR) relation can be further simplified and can be influenced by the material compositions. K0 can be used to estimate horizontal stress for drilling applications. The relationship between acoustic velocity and geomechanical is also found to be different between loading and unloading conditions. The static moduli of the overconsolidated sands are much higher than normal consolidated sands as the deformation is small (small strain). The correlation between dynamic and static elastic moduli is stronger for an overconsolidation stage than for a normal consolidation stage. The results of this study can contribute to geomechanical and acoustic dataset which can be applied for many seismic‐geomechanics applications in shallow sands where mechanical compaction is the dominant mechanism.
dc.description.abstractEffects of stress reduction on geomechanical and acoustic relationship of overconsolidated sands
dc.language.isoeng
dc.titleEffects of stress reduction on geomechanical and acoustic relationship of overconsolidated sands
dc.typePeer reviewed
dc.typeJournal article
dc.description.versionpublishedVersion
dc.source.pagenumber14
dc.source.journalGeophysical Prospecting
dc.identifier.doi10.1111/1365-2478.12902
dc.identifier.cristin1745823
dc.relation.projectNorges forskningsråd: 200475
cristin.unitcode7452,4,5,0
cristin.unitnamePetroleumsgeomekanikk og geofysikk (PGG)
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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