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

用于校准移动 NMR 扫描仪的集成岩心和测井调查 - 特别关注气体水合物 Leg 204

• 批准号: 5411372
• 负责人: Professor Dr. Christoph Clauser
• 金额: --
• 依托单位: Institute for Applied Geophysics and Geothermal Energy (GGE)
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2003
• 资助国家: 德国
• 起止时间: 2002-12-31 至 2008-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5411372?language=en
• 关键词: Integrated; core; log; investigations; calibrating

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.

核磁共振技术在石油工业中得到了广泛的应用，是评价地层孔隙度和渗透率最合适的方法之一。最近，人们正在努力使核磁共振方法也适用于ODP和即将到来的IODP计划。一种移动式核磁共振采样器目前正在研发中。为了建立一种快速、无损的常规测定岩石孔隙度的方法，并对ODP型岩心的孔径分布进行估算。第一，结果非常令人鼓舞，表明有必要加强岩石物理和地质研究。其目的是测试核磁共振岩心扫描仪对ODP值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，并用大量的岩石物理数据集校准核磁共振结果。调查将集中在204段(水合物山脊)，在那里首次使用随钻测井(LWD)技术在ODP区进行核磁共振测井。所有的钻井和测井作业都非常成功，提供了来自相邻钻孔的出色的岩心、绳索和随钻测井数据。我们建议利用这一独特的机会对核磁共振岩心扫描仪和核磁共振测井数据进行对比研究。通过将常规电缆数据和井壁电成像(RAB/FMS)相结合，最终将从岩性、岩石物理和流体流动特性方面对沉积物进行详细的表征。