Dynamic stress mapping utilizing ultrasonic tomography

T. E. Scott, Q. Ma, J. C. Roegiers, Z. Reches

Research output: Contribution to conferencePaperpeer-review

17 Scopus citations

Abstract

Two indentation experiments were conducted to generate acoustic tomographic velocity imaging of a dynamically developing complex stress field. The indentation tests were conducted on dry Berea sandstone cores with successive loading increments up to 110 MPa being applied to a hardened steel indenter. A series of 20 acoustic sensors were arranged either in vertical or horizontal planes to tomographically image cross-sectional planes parallel and perpendicular to the indentation direction. The indentation generates a strongly heterogeneous stress field with the highest stresses located in the rock directly beneath the indenter. The regions of high stresses, delineated by an ABAQUS finite element solution, correspond to the tomographically mapped regions of high velocity. These results suggest that tomographic acoustic velocity changes resulting from perturbations in elastic stress states can be successfully mapped in porous reservoir rocks both in laboratory tests and in the field environment.

Original languageEnglish
Pages427-434
Number of pages8
StatePublished - 1994
Externally publishedYes
Event1st North American Rock Mechanics Symposium, NARMS 1994 - Austin, United States
Duration: 1 Jun 19943 Jun 1994

Conference

Conference1st North American Rock Mechanics Symposium, NARMS 1994
Country/TerritoryUnited States
CityAustin
Period1/06/943/06/94

Bibliographical note

Publisher Copyright:
© 1st North American Rock Mechanics Symposium, NARMS 1994. All rights reserved.

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