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: 2012
• 资助国家: 加拿大
• 起止时间: 2012-01-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=514491
• 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.

将常规的地震勘探技术应用于图像深层矿物质沉积物的气体水合物积累提出了一个问题：地震波散射是由物理岩石中强的局部合同引起的。巨大的硫化物表现出可变的压缩和剪切波速度，但密度对比通常超过50％。气体水合物的积累的特征是高压和剪切波的对比度（高达100％，高度可变（Q-因子），无明显的密度对比度。