Electro-kinetic measurements as a function of frequency and rock deformation: theory, experiment, modelling and applications

作为频率和岩石变形函数的电动测量：理论、实验、建模和应用

• 批准号: 261730-2011
• 负责人: Glover, Paul
• 金额: $ 0.66万
• 依托单位: Université Laval
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2012
• 资助国家: 加拿大
• 起止时间: 2012-01-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=507549
• 关键词: Electro; kinetic; measurements; function; frequency

Fluid flowing through rocks and soils cause an electrical potential to be developed in the opposite direction. This is an electro-kinetic process which may, in future, be extremely useful. The main reason for this is that we can measure the electrical potential within the Earth`s crust from the surface. If we know how the electro-kinetic mechanism works, it should be possible to monitor the flow of fluids deep down. Between 1997 and 2003 a complete steady-state theory of electrical conduction in rocks and soils was developed by Paul Glover (the applicant) and others. Since then the applicant`s research group has made major progress in developing theories that include the microstructural properties of the rocks and soils, and the effect of frequency, and they have constructed devices for measuring both steady-state and frequency-dependent streaming potentials, which is the name given to the induced electrical potentials. The group has applied these advances to fluid flow in volcanoes, geothermal, water and hydrocarbon reservoirs, earthquake mechanisms, rock permeability, transformations between grain diameter and pore radii, and seismoelectric exploration. It is clear that many more applications exist including minitoring of shale gas extraction,and some which are well outside the geosciences, in civil engineering, environmental egineering and even biology and food science. This grant will enable us to (i) make a large number of laboratory measurements of electrokinetic properties for different rocks, sands, soils which are saturated with fluids of different chemistry, salinity and pH, (ii) to make measurements as a function of frequency and grain size, (iii) to make measurements while the rock is being deformed, (iv) to develop theoretical models and test them with the data, (v) to use the data and theory to model and solve problems involving volcanoes, earthquakes, radon gas, permafrost melting, oil, gas and water reservoirs and seismo-electric exploration.

流过岩石和土壤的流体会导致沿相反方向发展的电势。这是一个电动过程，将来可能非常有用。这样做的主要原因是我们可以测量地面上地壳内的电势。如果我们知道电动机制的工作原理，则应该有可能监测深入的流体流动。在1997年至2003年之间，保罗·格洛弗（Paul Glover）（申请人）和其他人开发了一种完整的岩石和土壤电传导理论。从那时起，申请人的研究小组在开发包括岩石和土壤的微观结构特性的理论方面取得了重大进展，以及频率的效果，并且它们构建了用于测量稳态和频率依赖性流势的设备，这是诱导的电势的名称。该小组将这些进步应用于火山，地热，水和碳氢化合物储层，地震机制，岩石渗透性，晶粒直径和孔径之间的转化以及seismoelectric Exploration之间的流体流动。显然，还有更多的应用，包括对页岩气提取的矿物质，有些在地球科学，土木工程，环境电子技术，甚至生物学和食品科学方面都很好。这项赠款将使我们能够（i）对电动性特性进行大量实验室测量，用于不同的岩石，沙子，土壤，这些岩石，土壤，土壤中充满了不同化学，盐度和pH的流体饱和，（ii）（ii）将测量作为频率和晶粒尺寸的函数，（iii），（iii）在岩石中进行测量，以便在岩石中进行测量，并在图中进行测量，并且（iiv）（iv）（iv）（iv）（iv）（iv）（iv）（iv）（iv）（iv）（iv）（iv）（iv）（V）并解决了涉及火山，地震，ra，多年冻土，油，气和水库以及地震电勘探的问题。