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dc.contributor.authorJensen, Erling Hugoeng
dc.contributor.authorAndersen, Charlotte Fausteng
dc.contributor.authorJohansen, Tor Arneeng
dc.date.accessioned2011-11-15T14:29:37Z
dc.date.available2011-11-15T14:29:37Z
dc.date.issued2011-01-13eng
dc.PublishedGeophysics 76(1): E9-E20en
dc.identifier.issn0016-8033en_US
dc.identifier.urihttps://hdl.handle.net/1956/5188
dc.description.abstractWe have developed a procedure for estimating the effec­tive elastic properties of various mixtures of smectite and kaolinite over a range of confining pressures, based on the individual effective elastic properties of pure porous smectite and kaolinite. Experimental data for the pure samples are used as input to various rock physics models, and the predictions are compared with experimental data for the mixed samples. We have evaluated three strategies for choosing the initial prop­erties in various rock physics models: (I) input values h ave th e sa me porosit y, (2) input values have the same pressure, and (3) an average of (I) and (2). The best results are obtained when the elastic moduli of the two porous constituents are de­fined at the same pressure and when their volumetric fractions are adjusted based on different compaction rates with pressure. Furthermore, our strategy makes the modeling re­sults less sensitive to the actual rock physics model. The method can help obtain the elastic properties of mixed unconsolidated clays as a function of mechanical compaction. The more common procedure for estimating effective elastic properties requires knowledge about volume fractions, elas­tic properties of individual constituents, and geometric de­tails of the composition. However, these data are often uncer­tain , e.g., large variations in the mineral elastic properties of clays have been reported in the literature, which makes our procedure a viable alternative.en_US
dc.relation.ispartof<a href="http://hdl.handle.net/1956/5192" target="blank">Methods for improved prediction of elastic, electrical and reservoir properties </a>en_US
dc.rights.urihttp://www.seg.org/resources/publications/permissionseng
dc.titleEstimation of elastic moduli of mixed porous clay compositesen_US
dc.typePeer reviewed
dc.typeJournal article
dc.description.versionpublishedVersionen_US
dc.identifier.doihttps://doi.org/10.1190/1.3511351
dc.subject.nsiVDP::Mathematics and natural science: 400::Geosciences: 450en_US


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