The role of stress and fluid saturation on the acoustic response of fractured rock

dc.citation.articleNumber1058984
dc.citation.journalTitleFrontiers in Earth Science
dc.citation.volumeNumber11
dc.contributor.authorLisabeth, Harrison P.
dc.contributor.authorAjo-Franklin, Jonathan
dc.date.accessioned2024-05-08T18:56:13Z
dc.date.available2024-05-08T18:56:13Z
dc.date.issued2023
dc.description.abstractStandard rock physics models are formulated to describe the behavior of porous sedimentary reservoirs, with clean sandstones being the archetypal system; however, many situations demand geophysical monitoring of rocks with significantly different structures, such as low porosity, fractured reservoirs. Conventional models also suggest that these “stiff” reservoirs can be challenging to monitor seismically due to small fluid substitution effects, but the presence of fractures leads to stress dependence which may be leveraged for remote monitoring purposes. Using samples from the Duperow Formation (dolostone) obtained from the Danielson test well in Kevin Dome, MT, we conducted ultrasonic and multi-scale structural (profilometry, synchrotron micro-tomography, pressure sensitive film) measurements on naturally fractured core in order to characterize the effects of fluid substitution and effective stress on the acoustic response of fractured reservoir rock with a focus in particular on the textural and seismic characteristics of natural fractures. We find that changes in effective stress can yield changes in velocity of up to 20% and changes in attenuation up to 200%. Measured fluid substitution effects are resolvable, but stress effects dominate. These measurements provide insight into the physical processes controlling acoustic response of fractured rocks in general and can also be used to inform monitoring efforts in fractured reservoirs.
dc.identifier.citationLisabeth, H. P., & Ajo-Franklin, J. (2023). The role of stress and fluid saturation on the acoustic response of fractured rock. Frontiers in Earth Science, 11. https://doi.org/10.3389/feart.2023.1058984
dc.identifier.digitalfeart-11-1058984
dc.identifier.doihttps://doi.org/10.3389/feart.2023.1058984
dc.identifier.urihttps://hdl.handle.net/1911/115701
dc.language.isoeng
dc.publisherFrontiers Media S.A.
dc.rightsExcept where otherwise noted, this work is licensed under a Creative Commons Attribution (CC BY) license. Permission to reuse, publish, or reproduce the work beyond the terms of the license or beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleThe role of stress and fluid saturation on the acoustic response of fractured rock
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
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