摘要：We have conducted laboratory experiments at seismic frequency (2-100Hz) to examine the effect of strain-gagescale inhomogeneity on Young's modulus measurements when using the stress-strain method. The length of the strain gage is ∼5mm, much smaller than that of samples (aluminum, Plexiglas and a tight sandstone). The aluminum sample and the Plexiglas sample are regarded as homogeneous on the strain gage scale. The Young's modulus measured at different positions of the aluminum and Plexiglas samples shows little difference. For the tight sandstone fully saturated with oil, which is inhomogeneous on the strain gage scale, the Young's modulus appears to show a large difference between measurements at two different positions. Both the Young's modulus and attenuation measurements are verified to be reliable using the Kramers-Kronig relationship. As a sample exhibits inhomogeneity on the strain gage scale, the modulus measured just represents local property instead of the effective homogeneous property. This finding has profound implications how we should measure the elastic and inelastic properties of 'effective homogeneous' samples. We will further investigate how to estimate these properties of such samples in the low frequency range in the laboratory.

ISSN号：9789462822177

发表日期：2017-01-01

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：79th EAGE Conference and Exhibition 2017

通讯作者：赵立明

第一作者：唐跟阳,董春晖,王尚旭

论文类型：会议论文

论文概要：赵立明,唐跟阳,董春晖,王尚旭，Effect of strain-gage-scale inhomogeneity on measuring young's modulus at low frequency，79th EAGE Conference and Exhibition 2017，2017，

论文题目：Effect of strain-gage-scale inhomogeneity on measuring young's modulus at low frequency