In this study, we find that variation of Hashin-Shtrikman bounds caused by pore fluid change is governed by the Biot-Gassmann theory. Also, we have shown that it is generally valid to assume that the relative position of the effective moduli of a rock within the Hashin-Shtrikman bounds is not affected by pore fluid change. Thus Hashin-Shtrikman bounds can be used as a valid fluid substitution tool. Comparing with Gassmann fluid substitution, the velocity predicted by Hashin-Shtrikman bounds generally fits better with the measured data since part of the dispersion is included, and it can be used as a more general pore infill substitution tool.
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Theoretical Validation of Fluid Substitution By Hashin-Shtrikman Bounds
Paper presented at the 2011 SEG Annual Meeting, San Antonio, Texas, September 2011.
Paper Number: SEG-2011-2251
Published: September 18 2011
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Yan, Fuyong, and De-hua Han. "Theoretical Validation of Fluid Substitution By Hashin-Shtrikman Bounds." Paper presented at the 2011 SEG Annual Meeting, San Antonio, Texas, September 2011.
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