The Elastic Anisotropy of the Whitby Mudstone Formation at Varying Water Saturations

Lisanne Douma, J. Dautriat, J. Sarout, D. Dewhurst, Auke Barnhoorn

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review


Mudstones are characterized by their tight matrix and are therefore of interest in various industries, including the petroleum and underground repository industry. These clay-rich rocks often show dynamic elastic anisotropy, which causes significant problems in geophysical interpretations. In addition, pore water has a significant effect on the bulk properties of mudstones. However, the degree of saturation is often not reported in the literature. This study investigates the impact of water saturation on the elastic anisotropy of the Whitby Mudstone. Four core plugs with different water saturations were deformed until failure and tested ultrasonically at effective confining pressure conditions of 25 MPa. P-wave and S-wave velocities were monitored along the symmetry axis, across the core diameter, and at ~49˚ to the horizontal bedding plane to calculate the full elastic tensor and subsequently the Thomsen anisotropy parameters. The degree of saturation highly affects the rock strength and static elastic properties and leads to significant changes in the elastic anisotropy parameters.
Original languageEnglish
Title of host publicationProceedings of the Sixth EAGE Shale Workshop
Number of pages5
Publication statusPublished - 2019
EventSixth EAGE Shale Workshop - Bordeaux, France
Duration: 28 Apr 20191 May 2019


WorkshopSixth EAGE Shale Workshop
Internet address


Dive into the research topics of 'The Elastic Anisotropy of the Whitby Mudstone Formation at Varying Water Saturations'. Together they form a unique fingerprint.

Cite this