Mineral-Water Geochemistry and Proton Nuclear Magnetic Resonance (1HNMR) in Porous Sandstones

需要了解的物理化学环境的 岩石中充满溶液的孔隙具有地球化学意义， 固液间溶质迁移和传质 地层评价的阶段和岩石物理意义， 磁共振成像 该项目将有助于建立 通过研究质子核 砂岩孔隙填充溶液中的磁共振弛豫。 该项目的总体目标是量化 溶液组成对弛豫速率的影响。 两个完整的岩石核心 并将使用分解的谷物包装。 矿物表面 将始终进行预处理，材料将 充分表征，确定岩石物理性质 （孔隙率，孔径分布，表面积：体积比， 渗透率、顺磁磁化率和BET表面积） 和地球化学性质（矿物学、可提取顺磁性 种类和阳离子交换能力）。 实验对照 渗透率和弛豫速率包括溶液组成， 表面预处理，温度，并为粮食包，粮食 尺寸和矿物学。 这些数据将被解释为提供三个 定量信息的类型：（1）不同的影响 表面对弛豫的影响，（2）溶液组成的影响 弛豫机制（激活 体相和表面诱导弛豫能 流程.

The need to understand the physicochemical environment of solution-filled pores in rocks has geochemical implications for solute transport and mass transfer between solid and solution phases and petrophysical implications for formation evaluation and magnetic resonance imagining. The proposed project will help build that understanding through an investigation of proton nuclear magnetic resonance relaxation in sandstone pore-filling solutions. The overall goal of the project is to quantify the effect of solution composition on relaxation rates. Both intact rock cores and disaggregated grain packs will be used. The mineral surfaces will be consistently pre-conditioned, and the materials will be well-characterized, with determinations of rock physical properties (porosity, pore-size distribution, surface area: volume ratio, permeability, paramagnetic susceptibility, and BET surface area) and geochemical properties (mineralogy, extractable paramagnetic species, and cation exchange capacity). Experimental controls on permeability and relaxation rate include solution composition, surface pre-treatment, temperature, and for the grain packs, grain size and mineralogy. The data will be interpreted to provide three types of quantitative information: (1) the influence of different surfaces on relaxation, (2) the influence of solution composition on relaxation, and (3) relaxation mechanisms (with activation energies for bulk-solution and surface-induced relaxation processes.