Bibliographic Citation
| Document | For copies of Journal Articles, please contact the Publisher or your local public or university library and refer to the information in the Resource Relation field. For copies of other documents, please see the Availability, Publisher, Research Organization, Resource Relation and/or Author (affiliation information) fields and/or Document Availability. |
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| DOI | http://dx.doi.org/10.1190/1.1443738 |
| Title | Ultrasonic velocity-porosity relationships for sandstone analogs made from fused glass beads |
| Creator/Author | Berge, P.A. ; Bonner, B.P. ; Berryman, J.G. [Lawrence Livermore National Lab., CA (United States)] |
| Publication Date | 1995 Jan 01 |
| OSTI Identifier | OSTI ID: 37103 |
| DOE Contract Number | W-7405-ENG-48 |
| Other Number(s) | Journal ID: GPYSA7; ISSN 0016-8033; TRN: TRN: IM9519%%24 |
| Resource Type | Journal Article |
| Resource Relation | Journal Name: Geophysics; Journal Volume: 60; Journal Issue: 1; Other Information: PBD: Jan-Feb 1995 |
| Subject | 58 GEOSCIENCES ;02 PETROLEUM; RESERVOIR ROCK; ELASTICITY; MICROSTRUCTURE; POROSITY; SEISMIC WAVES; WAVE PROPAGATION; DATA ANALYSIS; PETROLEUM INDUSTRY; RESEARCH PROGRAMS |
| Description/Abstract | Using fused glass beads, the authors have constructed a suite of clean sandstone analogs, with porosities ranging from about 1 to 43%, to test the applicability of various composite medium theories that model elastic properties. They measured P- and S-wave velocities in dry and saturated cases for their synthetic sandstones and compared the observations to theoretical predictions of the Hashin-Shtrikman bounds, a differential effective medium approach, and a self-consistent theory known as the coherent potential approximation. The self-consistent theory fits the observed velocities in these sandstone analogs because it allows both grains and pores to remain connected over a wide range of porosities. This behavior occurs because this theory treats grains and pores symmetrically without requiring a single background (host) material, and it also allows the composite medium to become disconnected at a finite porosity. In contrast, the differential effective medium theory and the Hashin-Shtrikman upper bound overestimate the observed velocities of the sandstone analogs because these theories assume the microgeometry is represented by isolated pores embedded in a host material that remains continuous even for high porosities. The authors also demonstrate that the differential effective medium theory and the Hashin-Shtrikman upper bound correctly estimate bulk moduli of porous glass foams, again because the microstructure of the samples is consistent with the implicit assumptions of these two theoretical approaches. |
| Country of Publication | United States |
| Language | English |
| Format | Medium: X; Size: pp. 108-119 |
| System Entry Date | 2008 Feb 04 |
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Last Updated: 11/19/2009