Determining the properties and states of a geological volume from seismic waveforms: an integration of novel theory with laboratory and field methods

从地震波形确定地质体积的属性和状态：新颖理论与实验室和现场方法的结合

• 批准号: RGPIN-2016-03769
• 负责人: Innanen, Kristopher
• 金额: $ 2.11万
• 依托单位: University of Calgary
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=708739
• 关键词: Determining; properties; states; geological; volume

My research group is engaged in the creation of a maximally complete picture of the wave physics of seismic inversion - that is, the problem of listening to sound waves echoing back to the surface and from them inferring the properties of the hidden geology below. Success in this enterprise requires new and innovative research to be carried out in both basic and applied domains. The focus of the research program in this Discovery Grant proposal is on the former type: it will occur independently but in parallel with strong efforts by my group in applied research as well. The proposed research can be subdivided into three related themes. The first major theme is one of unification: transitioning towards a framework in which our two big available theories for inversion, "direct nonlinear inverse scattering" (IS) methods and "full waveform inversion" (FWI) methods, which are complementary but entirely exclusively considered in our field, are parts of a unified whole. This is very much unexplored scientific territory, but my group is in a unique position to create this unified scheme, and in fact will publicly describe some candidate approaches for the first time in the Fall of 2015. The second theme is the creation of quantitative methods describing the processes by which seismic waves scatter from 3D geological inclusions parameterized by anelastic, anisotropic, and rock-physics properties. General analytic methods for this purpose either do not exist or incompletely exist. This will result in new tools for simulation, directly applicable to problems of reservoir monitoring for stress and pressure, caprock integrity, fluid viscosity, etc., and will facilitate innovation in the first theme area. The third theme is the development of new tools and procedures for validation of new methods, especially those developed as outcomes of themes one and two. My group is beginning the development of a 3-stage validation scheme, incorporating laboratory data analysis as a stepping stone between simulated and field data validation steps. I propose a basic research plan built around these three themes, that leverages the parallel but independent applied research being carried out by my research group and my stake in other nearby ongoing seismic research projects.

我的研究小组致力于创造一幅最完整的地震反演波动物理学图景--也就是收听回声到地表的声波，并从声波中推断出下面隐藏的地质特征的问题。这项事业的成功需要在基础和应用领域开展新的和创新的研究。这份探索基金提案中的研究计划的重点是前一种类型：它将独立进行，但也与我的团队在应用研究方面的大力努力同时进行。拟议的研究可以细分为三个相关的主题。第一个主要主题是统一：过渡到一个框架，在这个框架中，我们现有的两大反演理论--“直接非线性逆散射”(IS)方法和“全波形反演”(FWI)方法--是一个统一的整体，这两个方法是互补的，但在我们的领域完全是唯一考虑的。这是一个非常未探索的科学领域，但我的团队处于一个独特的位置来创建这个统一的计划，实际上将在2015年秋季首次公开描述一些候选方法。第二个主题是创建描述地震波从3D地质包裹体散射的过程的定量方法，这些包裹体由滞弹性、各向异性和岩石物理属性参数化。用于此目的的一般分析方法要么不存在，要么不完全存在。这将产生新的模拟工具，直接适用于储层应力和压力、盖层完整性、流体粘度等监测问题，并将促进第一个主题领域的创新。第三个主题是开发新的工具和程序来验证新的方法，特别是作为主题一和主题二的成果而开发的方法。我的团队正在开始开发一个三阶段验证方案，将实验室数据分析作为模拟和现场数据验证步骤之间的垫脚石。我提出了一个围绕这三个主题建立的基础研究计划，该计划利用我的研究小组正在进行的平行但独立的应用研究，以及我在附近其他正在进行的地震研究项目中的股份。