【作者】 谷长春；

【导师】 王为民；

【作者基本信息】 中国科学院研究生院（渗流流体力学研究所） ， 流体力学， 2002， 硕士

【摘要】 目前，现有的技术无法快速从油田勘探开发过程中收集到的大量钻井岩屑中获得孔隙度、渗透率、可动流体百分数及含油饱和度等重要油层物理参数。针对这一问题，本文提出了一种将核磁共振分析技术应用于现场岩屑油层物理参数分析的方法，研究获得了一套适用于钻井岩屑的核磁共振分析技术。本技术充分发挥了核磁共振分析技术快速、无损测量的特点，实现了油层物理参数的现场快速测量。研究成果对油田勘探与开发均具有重要的应用价值。 在室内实验研究的基础上，本文对核磁共振岩屑分析技术进行了系统的研究，对比分析了核磁共振岩屑分析与室内核磁共振岩心分析的异同，对现场岩屑核磁共振分析的可行性进行了研究；给出了利用核磁共振技术确定岩屑孔隙度、渗透率及可动流体百分数等重要油层物理参数的方法；获得了一套利用核磁共振技术快速测量岩屑含油饱和度的方法；编制了专用于核磁共振岩屑分析的刻度标定及快速测量的两套软件，软件实现了核磁共振岩屑孔隙度、渗透率、可动流体百分数及含油饱和度的刻度定标和日常快速分析等功能。 研究结果表明，核磁共振分析技术具有快速、无接触、与样品外形体积无关的特性，不仅可以应用于规则形状的岩心样品，同样可以较好地应用于不规则的小颗粒样品，如岩屑的分析。对于砂岩，核磁共振岩屑分析可以获得与室内核磁共振岩心分析基本相同的测量结果。采用核磁共振岩屑分析技术不仅可以快速从岩屑中获得孔隙度、渗透率及可动流体百分数等重要油层物理参数，而且还可以实现岩屑含油饱和度的快速测量，这是目前室内核磁共振岩心分析较难做到的。更多还原

【Abstract】 A lot of cuttings can be produced during the field exploiting and production. But existing techniques can’t acquire the key petrophysical parameters such as porosity, permeability, mobile fluid percent and oil saturation etc. from the cuttings. In order to give a solution to this question, NMR cuttings analysis technique and a series of analysis methods are advanced in this paper. The techniques make full use of the fast measurement and non-damage characteristic of NMR analysis and realize the fast measurements of petrophysical parameters on site. The research result has important value to both field exploiting and production.On the basis of house experiments, this paper investigates the NMR cuttings analysis technique systematically. The comparison of core NMR analysis and cuttings NMR analysis is given. The feasibility of applying the NMR technique to cuttings is studied. The NMR cuttings analysis methods including cuttings porosity, permeability and cuttings mobile fluid percent are given. Two application softwares, the NMR calibration software and the fast NMR core analysis software, are programmed. The two softwares offer the specific calibration and fast measurement function of cuttings petrophysical parameters.The research results show that NMR technique has the advantage of fast, non-contact and independence of samples size and can be applied to the cuttings analysis. To sandstone, NMR cuttings analysis can get the same results as core analysis. And the NMR cuttings analysis can also realize the fast measurement of oil saturation, which is difficult for the NMR core analysis in the house at present.更多还原