Sensing Cracks in the Earth Using Multiple Scattering and Nonlinear Elasticity

使用多重散射和非线性弹性来感测地球裂缝

• 批准号: RGPIN-2016-04415
• 负责人: Malcolm, Alison
• 金额: $ 2.4万
• 依托单位: Memorial University of Newfoundland
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=634080
• 关键词: Sensing; Cracks; Earth; Using; Multiple

Cracks are increasingly important to our understanding of Earth resources and structures. They hold most of the unconventional oil and gas reserves, are important for geothermal energy, and play a role in conventional oil and gas production, volcanic eruptions and perhaps even earthquakes. In wavefields, they introduce scattering effects, in which waves reflect many times between different cracks in the subsurface, and it is likely cracks that introduce the dependence of elastic paramters on stress and strain, making rocks exhibit strong elastic nonlinearity. The long term goals of this research program are to better understand how to sense and characterize rocks. On the shorter term, we aim to (i) to better understand the role of cracks in the nonlinear elasticity of rocks with the long-term goal of using these parameters to image crack density and orientation and (ii) to use microseismic data sets to characterize scattering from cracks in volcanic regions to characterize cracks through scattering attenuation and fluids through intrinsic attenuation.

裂缝对于我们对地球资源和结构的理解越来越重要。他们拥有大多数非常规的石油和天然气储量，对地热能很重要，并且在常规的石油和天然气生产，火山喷发甚至地震中发挥作用。在波场中，它们引入了散射效应，其中波浪反映了地下不同裂缝之间的许多次，并且可能裂纹引入了弹性参数对压力和应变的依赖性，从而使岩石表现出强烈的弹性非线性。该研究计划的长期目标是更好地了解如何感知和表征岩石。 On the shorter term, we aim to (i) to better understand the role of cracks in the nonlinear elasticity of rocks with the long-term goal of using these parameters to image crack density and orientation and (ii) to use microseismic data sets to characterize scattering from cracks in volcanic regions to characterize cracks through scattering attenuation and fluids through intrinsic attenuation.