Seismic Imaging of High Impedance Mineral and Gas Hydrate Deposits

高阻抗矿物和天然气水合物矿床的地震成像

• 批准号: 249857-2012
• 负责人: Milkereit, Bernd
• 金额: $ 3.35万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=547424
• 关键词: Seismic; Imaging; Impedance; Mineral; Gas

Applying conventional seismic exploration techniques to image gas hydrate accumulations of deep mineral deposits poses a problem: seismic wave scattering caused by strong local contracts in physical rock properties. Massive sulfide exhibit variable compressional and shear wave velocities but density contrasts often exceed 50%. Gas Hydrate accumulations are characterized by high compressional and shear wave contrasts (up to 100%, highly variable attenuation (Q-factor) and no significant density contrasts.

应用传统的地震勘探技术对深层矿藏的天然气水合物聚集进行成像会带来一个问题：物理岩石特性的强烈局部收缩导致地震波散射。块状硫化物表现出可变的压缩波和剪切波速度，但密度对比通常超过 50%。天然气水合物聚集的特点是高压缩波和横波反差（高达 100%、高度可变的衰减（Q 因子）且没有显着的密度反差）。