Biot系数和岩石弹性模量的实验研究

doi:10.11743/ogg20080121

Abstract

Abstract:

The effects of effective pressure and lithology on Biot's coefficient and rock elastic moduli were analyzed through experimental testing at simulated in-situ conditions(including temperature,and confining pressure) upon 87 samples of sandstone from the Palaeogene formation in Jiyang Sag and by combining with the core thin-section analysis results.It is concluded that Biot's coefficient decreases as effective pressure and calcite cement content grow and increases with the increase of rock porosity,while rock elastic moduli become bigger as the effective pressure gets stronger.A Biot's coefficient model and a relational model between rock elastic moduli and porosity are built.The upper limits of bulk modulus or compressional velocity calculated through the mo-dels are closer to the measurements of samples,proving that the model may yield more logical parameters for oil field development.

Key words: Biot's coefficient, effective pressure, elastic modulus, pore elasticity, lithology

CLC Number:

P584

Ma Zhonggao. Experimental investigation into Biot's coefficient and rock elastic moduli[J]. Oil & Gas Geology, 2008, 29(1): 135-140.

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Experimental investigation into Biot's coefficient and rock elastic moduli

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