Pressure, Stress, and Stratigraphy: Hydrodynamic Analysis of a Young Compacting Sedimentary Basin

压力、应力和地层学：年轻压实沉积盆地的水动力分析

• 批准号: 9614689
• 负责人: Peter Flemings
• 金额: $ 8.9万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-02-01 至 2000-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9614689&HistoricalAwards=false
• 关键词: Pressure; Stress; Stratigraphy; Hydrodynamic; Analysis

9614689 Flemings The research proposed will use observation and theory to pursue a hydrodynamic analysis of the Eugene Island 330 mini-basin of offshore Louisiana, Gulf of Mexico. I will characterize the geology (e.g. lithostratigraphy and age of deposition), pressure, porosity, and stress field of this system. I will then study the individual behavior of these components. Examples of this include porosity/stress behavior, stress/pressure behavior, and rock property/pressure behavior. Finally, I will study the linkages between these components and develop a quantitative two-dimensional numerical (finite-element) hydrodynamic model to predict the state and evolution of fluid flow in this region. This research is new and innovative for three reasons. First, it is interdisciplinary (it integrates theory and observation in geology, hydrology, and rock mechanics). Second, it proposes to study a system at a higher resolution than previous basin-scale fluid-flow studies (for example the work of Bethke or Garven). Third, theory will be tightly constrained by observation of this system. A critical component of the project is that I have chosen a mature oil and gas field with an extraordinary database that will allow me to characterize this system at the kilometer scale. This includes multiple 3-D seismic surveys, hundreds of well logs, and direct measurements of pressure and permeability. This study will directly address a number of continuing controversies in basinal fluid flow. These include: 1) what causes the generation of abnormal pressures? 2) what component of fluid-flow is controlled by fracture permeability? 3) how is the horizontal stress controlled by the evolution of the pressure field? 4) how and when do faults behave as permeability conduits? The very nature of these questions shows the interdependence of rock mechanics, geology and hydrology. The inter-disciplinary or 'systems' approach that is proposed has the potential to gain insight not found with studie s of individual components of this system.

该研究计划将利用观测和理论对墨西哥湾路易斯安那州近海尤金岛330迷你盆地进行水动力学分析。我将描述该系统的地质特征（如岩石地层和沉积时代）、压力、孔隙度和应力场。然后，我将研究这些组件的单个行为。这方面的例子包括孔隙度/应力行为、应力/压力行为和岩石性质/压力行为。最后，我将研究这些成分之间的联系，并建立一个定量的二维数值（有限元）水动力模型来预测该地区流体流动的状态和演变。这项研究具有创新性，原因有三。首先，它是跨学科的（它结合了地质学、水文学和岩石力学的理论和观测）。其次，它提出以比以前的盆地尺度流体流动研究（例如Bethke或Garven的工作）更高的分辨率研究一个系统。第三，理论将受到对这一系统的观察的严格约束。该项目的一个关键组成部分是，我选择了一个成熟的油气田，它拥有一个非凡的数据库，可以让我在千米尺度上描述这个系统。这包括多次三维地震调查、数百口测井以及压力和渗透率的直接测量。这项研究将直接解决盆地流体流动中一些持续存在的争议。这些包括：1)是什么导致了异常压力的产生？2)流体流动的哪一部分受裂缝渗透率控制？3)水平应力如何受压力场演化的控制？4)断层如何以及何时表现为渗透性导管？这些问题的本质显示了岩石力学、地质学和水文学之间的相互依存关系。所提出的跨学科或“系统”方法有可能获得对该系统单个组件的研究所没有的见解。