Integrated core and log investigations for calibrating a mobile NMR scanner - with a special focus on the Gas Hydrate Leg 204

核磁共振技术广泛应用于石油工业，是评价地层孔隙度和渗透率的最合适的方法之一。最近，努力的方向是使NMR方法也适应ODP和即将到来的IODP计划。一种移动的核磁共振岩心扫描仪目前正在研制中.目的是建立一种快速、无损的常规岩石孔隙度测定方法，并对ODP岩心的孔径分布进行估算。第一批结果非常令人鼓舞，并表明需要加强岩石物理和地质研究。目的是测试NMR岩心扫描仪对ODP中常见岩石类型的适用性，特别是估计地层中的自由水和毛细管束缚水。进一步的目标是评估该方法的精度和局限性，并使用大量的岩石物理数据集校准NMR结果。调查将集中在204航次（海伯利脊），在那里，核磁共振测井首次在ODP中使用随钻测井（LWD）技术进行。所有的钻井和测井作业都非常成功，提供了来自邻近钻孔的优秀的岩心、电缆和随钻测井数据。我们建议利用这一独特的机会进行核磁共振岩心扫描仪和核磁共振测井数据之间的比较研究。通过整合常规电缆数据和电钻孔壁图像（RAB/FMS），这将最终在岩性，岩石物理学和流体流动特性方面的沉积物的详细表征。

NMR techniques are widely used in the oil industry and are one of the most suitable methods to evaluate in-situ formation porosity and permeability. Recently, efforts are directed towards adapting NMR methods also to ODP and the upcoming IODP program. A mobile NMR corescanner is presently under development... in order to establish a fast and nondestructive method to determine routinely rock porosity and to give estimate on the pore size distribution of ODP cores. First results are strongly encouraging and make evident the need for enhanced petrophysical and geological research. The objectives are to test the suitability of the NMR core scanner for rock types common in ODP, in particular to estimate the free and capillary bound water in the formation. Further goals are to evaluate the precision and the limits of the method and to calibrate the NMR results with a large collection of petrophysical data sets. Investigations will concentrate on Leg 204 (Hydrate Ridge), where NMR logging was performed in ODP for the first time by Logging-While-Drilling (LWD) technology. All drilling and logging operations were highly successful, providing excellent core, wireline, and LWD data from adjacent boreholes. We propose to use this unique opportunity for comparative studies between the NMR core scanner and the NMR logging data. By integrating conventional wireline data and electrical borehole wall images (RAB/FMS) this will end up in a detailed characterization of the sediments in terms of lithology, petrophysics and, fluid flow properties.