SBIR Phase II: Permeability and Complex Resistivity Measurements for Determination of Pore Structure in Rocks

岩石的许多基本体积性质，如渗透率、电阻率和弹性常数，都高度依赖于孔隙结构的细节。通过测量电阻率和声速（钻孔地球物理学中常见的方法）来推断渗透率等性质，需要彻底了解这些性质与其他体性质之间的相互关系，以及控制它们的底层孔隙结构。虽然已经开发了许多模型来预测基本体积性质与孔隙结构之间的相互关系，但这些模型的验证和常规使用需要在常规方式下对岩心进行大量不同的测量。渗透率和电阻率是了解孔隙结构的两个最重要的性质。虽然这些性质的实验室测量技术已经发展得很好，但同时测量渗透率和电阻率一直很困难，阻碍了常规和综合测量。此外，由于多种原因，试样变形过程中的渗透率测量一直很困难。在这里，将应用新开发的渗透率测量方法，以便建立一个常规和自动化测量渗透率、比储存、电阻率和变形的仪器。这里将要开发的仪器和技术非常适合于孔隙结构的常规测量和实验研究，以及它与岩石基本体积性质的关系。该项目在石油和岩土工程行业以及岩石测试服务行业具有商业潜力。

9529800 Boitnott Many fundamental bulk properties of rock such as permeability, electrical resistivity, and elastic constants are highly dependent on details of the pore structure. Attempts to infer properties such as permeability from measurements of electrical resistivity and acoustic velocities (common in borehole geophysics) require a thorough understanding of the inter-relationships between these and other bulk properties and the underlying pore structure which controls them. While a number of models have been developed which predict the inter-relationships between fundamental bulk properties and pore structure, validation and routine use of these models require a means of making a large number of diverse measurements on core in a routine fashion. Permeability and electrical resistivity are two of the most important properties for understanding pore structure. While laboratory measurement techniques for these properties are well developed, simultaneous measurement of permeability and electrical resistivity has been difficult to perform, inhibiting routine and integrated measurement. In addition, permeability measurement during sample deformation has been difficult for a number of reasons. Here newly developed methods for permeability measurement will be applied in order to construct an apparatus for routine and automated measurement of permeability, specific storage, electrical resistivity, and deformation. The apparatus and techniques to be developed here are well suited for routine measurements as well as experimental studies of pore structure and its relationship to the fundamental bulk properties of rock. The project has commercial potential in the petroleum and geotechnical industries and perhaps in the rock-testing service industry.