Effect of Stress on Permeability, Porosity and Pore Geometryof Rock

应力对岩石渗透率、孔隙度和孔隙几何形状的影响

• 批准号: 9117531
• 负责人: Teng-fong Wong
• 金额: $ 5.91万
• 依托单位: SUNY at Stony Brook
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-01-15 至 1993-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9117531&HistoricalAwards=false
• 关键词: Effect; Stress; Permeability; Porosity; Pore

Fluid exerts significant mechanical and chemical effects on virtually all crustal processes. Recent observations suggest that elevated pore pressures may exist in a range of crustal environments, including mature fault zones and accretionary complexes. Quantitative modeling of the generation and maintenance of overpressure in most of these problems requires a fundamental understanding of the relation among permeability, porosity and stress. This is an experimental program to determine permeability and porosity changes in porous aggregates (sandstones, hot pressed quartz, and ODP samples) under triaxial compression conditions. Microstructural observations, acoustic emission measurements and percolation modeling will be integrated in the study so as to gain a fundamental physical understanding of compaction/dilatancy and hydraulic transport in the crust.

流体对几乎所有的地壳过程都产生了显著的机械和化学效应。最近的观察表明，孔压升高可能存在于一系列地壳环境中，包括成熟断裂带和增生杂岩。对这些问题中的大多数超压的产生和维持进行定量模拟，需要对渗透率、孔隙度和应力之间的关系有一个基本的了解。这是一个实验程序，用于确定在三轴压缩条件下多孔集料(砂岩、热压石英和ODP样)的渗透率和孔隙度变化。这项研究将结合微观结构观察、声发射测量和渗流模拟，以便对地壳内的压实/扩容和水力传输有一个基本的物理了解。