摘要：The velocity dispersion of 3D nonporous heterogeneous medium depends on the heterogeneity scale. To study the frequency-dependent elastic response of 3D rock samples containing heterogeneities of different sizes, we conducted joint laboratorial experiments on the elastic property of a series of artificial sandstones under two different frequency ranges. The ultrasonic transmission technique and the differential acoustical resonance spectroscopy (DARS) method were used to measure the bulk moduli of the samples composed of equal amount of quartz grains and epoxy with a mass ratio of 3:1. The bulk modulus and velocity of the artificial samples generally decrease with wavelength/heterogeneity scale ratio for the ultrasonic measurements (∼ 1MHz). However, for the DARS measurements at a lower frequency range (∼600 Hz), the bulk moduli are smaller than those for the ultrasonic measurements, fluctuating around a constant value. This result shows that the velocity dispersion is much higher for small wavelength/heterogeneity scale ratio than for large values, which has a practical implication on estimating the elastic properties of rock formations of different heterogeneity scales in the laboratory. To this end, the DARS technique provides us with an efficient way to obtain elastic properties, which better matches the values estimated at the seismic frequency band.

ISSN号：9781510806627

卷、期、页：p1941-1945

发表日期：2015-01-01

期刊分区（SCI为中科院分区）：无

收录情况：EI（工程索引）

发表期刊名称：77th EAGE Conference and Exhibition 2015: Earth Science for Energy and Environment

通讯作者：袁东驹,乔阳,殷晗钧

第一作者：唐跟阳,王尚旭,赵建国

论文类型：会议论文

论文概要：袁东驹,唐跟阳,王尚旭,乔阳,赵建国,殷晗钧，Effect of heterogeneity scale on elastic properties of artificial sandstones at ultrasonic and quasi-seismic frequencies，77th EAGE Conference and Exhibition 2015: Earth Science for Energy and Environment，2015，p1941-1945

论文题目：Effect of heterogeneity scale on elastic properties of artificial sandstones at ultrasonic and quasi-seismic frequencies