| DOI: | 10.2172/1052176
|
| 报告号: | LBNL-5235E
|
| 报告题名: | Application of the Split Hopkinson Resonant Bar Test for Seismic Property Characterization of Hydrate-bearing Sand Undergoing Water Saturation |
| 作者: | Collard, L.; Hamm, L.; Smith, F.
|
| 出版年: | 2011
|
| 发表日期: | 2011-05-03
|
| 国家: | 美国
|
| 语种: | 英语
|
| 中文主题词: | 沉积物
; 甲烷
|
| 主题词: | SEDIMENTS
; METHANE
|
| 英文摘要: | Conventional resonant bar tests allow the measurement of seismic properties of rocks and sediments at low frequencies (several kilohertz). However, the tests require a long, slender sample which is often difficult to obtain from the deep subsurface and weak and fractured formations. We present an alternative low-frequency measurement technique to the conventional resonant bar tests. This technique involves a jacketed core sample placed between a pair of long, metal extension rods with attached seismic source and receiverâthe same geometry as the split Hopkinson pressure bar test for large-strain, dynamic impact experiments. Because of the added length and mass to the sample, the resonance frequency of the entire system can be lowered significantly, compared to the sample alone. The proposed âSplit Hopkinson Resonant Bar (SHRB)â test is applied in two steps. In the first step, extension and torsion-mode resonance frequencies and attenuation of the system are measured. Then, numerical inversions for the compressional and shear wave velocities and attenuation are performed. We initially applied the SHRB test to synthetic materials (plastics) for testing its accuracy, then used it for measuring the seismic velocities and attenuation of a rock core containing supercritical CO{sub 2}, and a sediment core while methane hydrate formed in the pore space. |
| URL: | http://www.osti.gov/scitech/servlets/purl/1052176
|
| Citation statistics: |
|
| 资源类型: | 研究报告
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/40233
|
| Appears in Collections: | 过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响
|
| File Name/ File Size |
Content Type |
Version |
Access |
License |
|
|---|
| 1052176.pdf（473KB） | 研究报告 | -- | 开放获取 | | View
Download
|
|
| Recommended Citation: | |
Collard, L.,Hamm, L.,Smith, F.. Application of the Split Hopkinson Resonant Bar Test for Seismic Property Characterization of Hydrate-bearing Sand Undergoing Water Saturation. 2011-01-01.
|
|
|