Permeability and Complex Resistivity Measurements for Determination of Pore Structure in Low Permeability Rocks

该小型企业创新研究第一阶段项目将采用一种新的渗透率测量方法，以便同时测量电阻率和变形。岩石的许多基本的整体性质，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。尝试从电阻率和声速（常见于井眼岩石物理学）的测量结果推断渗透率等属性，需要彻底了解这些和其他整体属性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预测基本本体性质和孔隙结构之间的相互关系的模型，但是这些模型的验证和常规使用需要以常规方式对岩心进行大量不同测量的手段。渗透率和电阻率是理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很好地发展，但难以同时测量渗透率和电阻率，这抑制了常规和综合测量。该提案工作将采用一种新的渗透率测量方法，以构建一种用于常规和自动测量渗透率、比储存、电阻率和变形的装置。所开发的仪器和技术将非常适合于常规测量以及孔隙结构及其与岩石基本整体性质的关系的实验研究。

This Small Business Innovation Research Phase I project will adapt a new method for permeability measurement to allow for simultaneous measurements of electrical resistivity and deformation. 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 requires 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 measurements of permeability and electrical resistivity have been difficult to perform, inhibiting routine and integrated measurement. The proposal work will adapt a new method for permeability measurement in order to construct an apparatus for routine and automated measurement of permeability, specific storage, electrical resistivity, and deformation. The apparatus and technique to be developed will be well suited for routine measurements as well as experimental studies of pore structure and its relationship to the fundamental bulk properties of rock.