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
基本信息
- 批准号:RGPIN-2016-04415
- 负责人:
- 金额:$ 2.4万
- 依托单位:
- 依托单位国家:加拿大
- 项目类别:Discovery Grants Program - Individual
- 财政年份:2022
- 资助国家:加拿大
- 起止时间:2022-01-01 至 2023-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
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. To look at how cracks influence the nonlinearity of rocks, we will work from a recently developed experiment that uses a high-amplitude shear wave to perturb the elastic properties of a rock, and senses those perturbations with a P-wave. We have data indicating that this experiment senses the orientation of cracks in a sample. To better understand why this is the case, and the underlying mechanisms of nonlinear elasticity, we will develop a comprehensive numerical model of this experiment. To verify this model, we will perform a suite of new lab experiments focussing on igneous rocks (our past work has focussed on sedimentary rocks). To characterize cracks from microseismic data, we will use a data set from Iceland, collected to monitor seismicity for volcanic and geothermal applications. We will use these data to measure scattering strength and intrinsic attenuation of the region and its variability. We will perform laboratory and numerical experiments, using the techniques developed for the nonlinear elasticity part of the project to better understand our results and will interpret them in terms of local stress changes. The novelty of this work is in the use of both techniques to understand cracks, their orientation, density, and properties. The approach of using a combination of numerical modelling, laboratory, and field data will improve our understanding of the physics underlying these phenomena, and will change how we sense cracks in the subsurface. This is important to the oil and gas industry, which plays a significant role in the Canadian economy, as well as to the geothermal industry, which is likely to play a role in future energy supply and has longer term implications for natural hazard mitigation in Canada and elsewhere.
裂缝对我们了解地球资源和结构越来越重要。 它们拥有大部分非常规石油和天然气储量,对地热能源很重要,并在常规石油和天然气生产、火山爆发甚至地震中发挥作用。 在波场中,它们引入了散射效应,其中波在地下的不同裂缝之间多次反射,并且可能是裂缝引入了弹性参数对应力和应变的依赖性,使得岩石表现出强烈的弹性非线性。这项研究计划的长期目标是更好地了解如何感知和表征岩石。 在短期内,我们的目标是(i)更好地了解裂缝在岩石非线性弹性中的作用,长期目标是使用这些参数来成像裂缝密度和方向,以及(ii)使用微震数据集来表征火山地区裂缝的散射,通过散射衰减来表征裂缝,通过固有衰减来表征流体。为了研究裂缝如何影响岩石的非线性,我们将从最近开发的实验中进行研究,该实验使用高振幅剪切波来扰动岩石的弹性特性,并用P波来感知这些扰动。 我们有数据表明,这个实验可以感知样品中裂纹的方向。 为了更好地理解为什么会出现这种情况,以及非线性弹性的基本机制,我们将为这个实验建立一个全面的数值模型。 为了验证这个模型,我们将进行一系列新的实验室实验,重点是火成岩(我们过去的工作集中在沉积岩上)。 为了表征来自微震数据的裂缝,我们将使用来自冰岛的数据集,收集这些数据是为了监测火山和地热应用的地震活动。我们将使用这些数据来测量该区域的散射强度和固有衰减及其变化。我们将使用为项目的非线性弹性部分开发的技术进行实验室和数值实验,以更好地理解我们的结果,并将根据局部应力变化对其进行解释。 这项工作的新奇在于使用这两种技术来了解裂缝,它们的方向,密度和属性。 使用数值模拟,实验室和现场数据相结合的方法将提高我们对这些现象背后的物理学的理解,并将改变我们感知地下裂缝的方式。 这对在加拿大经济中发挥重要作用的石油和天然气工业以及可能在未来能源供应中发挥作用并对加拿大和其他地方减轻自然灾害具有长期影响的地热工业都很重要。
项目成果
期刊论文数量(0)
专著数量(0)
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Malcolm, Alison其他文献
Malcolm, Alison的其他文献
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{{ truncateString('Malcolm, Alison', 18)}}的其他基金
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 - 财政年份:2021
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
Joint Inversion and Uncertainty Quantification of Electromagnetic and Seismic Data
电磁和地震数据的联合反演和不确定性量化
- 批准号:
566906-2021 - 财政年份:2021
- 资助金额:
$ 2.4万 - 项目类别:
Alliance Grants
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 - 财政年份:2019
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
NSERC/Chevron Industrial Research Chair in Reservoir Characterization
NSERC/Chevron 油藏表征工业研究主席
- 批准号:
491051-2014 - 财政年份:2019
- 资助金额:
$ 2.4万 - 项目类别:
Industrial Research Chairs
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:
492958-2016 - 财政年份:2018
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Accelerator Supplements
NSERC/Chevron Industrial Research Chair in Reservoir Characterization
NSERC/Chevron 油藏表征工业研究主席
- 批准号:
491051-2014 - 财政年份:2018
- 资助金额:
$ 2.4万 - 项目类别:
Industrial Research Chairs
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 - 财政年份:2018
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
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:
492958-2016 - 财政年份:2017
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Accelerator Supplements
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 - 财政年份:2017
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
NSERC/Chevron Industrial Research Chair in Reservoir Characterization
NSERC/Chevron 油藏表征工业研究主席
- 批准号:
491051-2014 - 财政年份:2017
- 资助金额:
$ 2.4万 - 项目类别:
Industrial Research Chairs
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