Effects of Stress and Fluid Composition on Pore Structure and Permeability During Hydrothermal Compaction

水热压实过程中应力和流体成分对孔隙结构和渗透率的影响

• 批准号: 9814796
• 负责人: James Hirth
• 金额: $ 17.12万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-01-01 至 2002-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9814796&HistoricalAwards=false
• 关键词: Effects; Stress; Fluid; Composition; Pore

9814796Hirth The PIs propose to conduct a series of experiments and microstructural measurements to understand the evolution of pore structure and permeability during hydrothermal compaction. The research will focus on studying the effect of triaxial stresses on the pore structure of calcite rocks that deform by plastic flow or by solution transfer processes. Compaction mechanisms and the effect of fluid chemistry on pore structure and transport properties will also be investigated. An important comparison will be made between experiments on aqueous systems and those done using argon, an essentially inert pore fluid. They will quantify the changes in pore size distribution and pore connectivity in relation to porosity decrease during densification using SEM and laser confocal microscopy.

[9814796 . hirth] PIs建议通过一系列实验和微观结构测量来了解热液压实过程中孔隙结构和渗透率的演化。本研究将重点研究三轴应力对方解石在塑性流动或溶液转移过程中孔隙结构的影响。压实机制和流体化学对孔隙结构和输运性质的影响也将被研究。将对水系统的实验和用氩（一种本质上是惰性的孔隙流体）进行的实验进行重要的比较。他们将利用扫描电子显微镜和激光共聚焦显微镜量化致密化过程中孔隙度减少与孔隙大小分布和孔隙连通性的变化。