On the Unjacketed Moduli of Sedimentary Rock

Roman Y. Makhnenko, Ali Tarokh, Yuri Y. Podladchikov

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Experimental techniques have been developed to measure two poroelastic parameters: unjacketed bulk modulus Ks' and unjacketed pore modulus Ks'. Ks' is measured on samples with no jacket that are instrumented with strain gages, confining fluid (oil) penetrates inside the material and hydrostatic mean stress is equal to pore pressure, so the overal unjacketed bulk modulus can be calculated. Ks' is measured on water-saturated rock by determining the change in pore volume of the specimen from accurate measurements on pore pressure controller, while the difference between mean stress and pore pressure is preserved constant. Ks' and Ks' are measured to be pressure-independent for Berea sandstone and Opalinus clay (shale). Ks' ≈ Ks' for the clay-rich shale, but Ks' is smaller than Ks' and bulk modulus of quartz for quartz-rich Berea sandstone. This result is explained by the presence of non-connected porosity.

Original languageEnglish (US)
Title of host publicationPoromechanics 2017 - Proceedings of the 6th Biot Conference on Poromechanics
EditorsPatrick Dangla, Jean-Michel Pereira, Siavash Ghabezloo, Matthieu Vandamme
PublisherAmerican Society of Civil Engineers
Pages897-904
Number of pages8
ISBN (Electronic)9780784480779
DOIs
StatePublished - 2017
Event6th Biot Conference on Poromechanics, Poromechanics 2017 - Paris, France
Duration: Jul 9 2017Jul 13 2017

Publication series

NamePoromechanics 2017 - Proceedings of the 6th Biot Conference on Poromechanics

Other

Other6th Biot Conference on Poromechanics, Poromechanics 2017
CountryFrance
CityParis
Period7/9/177/13/17

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Acoustics and Ultrasonics

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