摘要：Based on both forced oscillation and ultrasonic pulse transmission methods, we investigated solid pore infill influences on rock elastic moduli in a broad frequency range [1 鈭? 3000, 106] Hz for different differential pressures. For a Berea sandstone sample, filled sequentially by solid (22 oC), quasi-solid (26 oC) and liquid (34 oC) octadecane, a frequency-dependence was found for the Poisson鈥檚 ratio, Young鈥檚 modulus and bulk modulus, nevertheless, these elastic parameters were strongly suppressed by increasing pressures. Experimental measurements showed that shear wave velocity and modulus of solid-octadecane-filled samples are significantly larger than those of the dry and liquid-octadecane-filled ones, implying the potential stiffening effects related to solid infill in compliant pores. A three porosity structure model, which describes the solid stiffening effects related to equant, compliant and the intermediate pores with aspect ratios larger than those of compliant pores but much less than those of stiff pores, was used to compare against the experimentally measured elastic properties for octadecane pore infill, together with several other fluid/solid substitution theories. The agreement between experimental measurements and theoretical predictions is reasonably good for the sandstone tested, providing that the three porosity model can be applied for pressure- and frequency-dependent elastic moduli estimations for a viscoelastic pore-infill-saturated sandstone. Evaluating the combined squirt flow mechanism responsible for the observed moduli dispersion and attenuation is of great importance to reduce potential errors in seismic AVO inversion and 4-D seismic monitoring of gas-hydrate or bitumen-saturated reservoir, especially for reservoir rocks with complex microstructures and heterogeneous pore types. 漏 The Author(s) 2024. Published by Oxford University Press on behalf of The Royal Astronomical Society.

ISSN号：0956-540X

卷、期、页：卷238期2：902-921

发表日期：2024-06-22

期刊分区（SCI为中科院分区）：三区

收录情况：SCI（科学引文索引印刷版）,地学领域高质量科技期刊分级目录（国外T2）,EI（工程索引）,SCIE（科学引文索引网络版）

发表期刊名称：GEOPHYSICAL JOURNAL INTERNATIONAL

参与作者：孙超,施佩东

第一作者：贺艳晓,王尚旭,唐跟阳,董春晖,袁三一

论文类型：期刊论文

论文概要：贺艳晓,王尚旭,唐跟阳,董春晖,孙超,袁三一,施佩东，Experimental investigation of pore-filling substitution effect on frequency-dependent elastic moduli of Berea sandstone，GEOPHYSICAL JOURNAL INTERNATIONAL，2024，卷238期2：902-921

论文题目：Experimental investigation of pore-filling substitution effect on frequency-dependent elastic moduli of Berea sandstone