新疆石油地质 ›› 2009, Vol. 30 ›› Issue (6): 768-770.

• 应用技术 • 上一篇    下一篇

用核磁共振分析岩石孔隙结构特征

王胜   

  1. 中国石化 胜利油田有限责任公司 地质科学研究院,山东 东营 257000
  • 收稿日期:2009-07-27 发布日期:2020-10-23
  • 作者简介:王 胜 (1973-),男,山东青岛人,高级工程师,油气田开发, (Tel)13668617856(E-mail)wangsh_73@163.com.

Analysis of Rock Pore Structural Characteristic by Nuclear Magnetic Resonance

WANG Sheng   

  1. Research Institute of Geosciences, Shengli Oilfield Company Ltd., Sinopec, Dongying, Shandong 257000, China
  • Received:2009-07-27 Published:2020-10-23

摘要: 岩石核磁共振 t2 分布能够很好地反映岩石的孔隙特征,通过岩石压汞曲线与核磁共振 t2 分布建立的转换关系无法统一转换系数值,在实际应用中产生较大误差。从岩石核磁共振弛豫机理入手,合理制作了标准物理模型,并通过图像及核磁共振分析建立了砂岩核磁共振 t2 值与孔隙半径之间的数学模型,并确定了转换系数,取得了良好的应用效果,为核磁共振分析岩石孔隙特征提供了新方法。

关键词: 核磁共振, 岩石孔隙结构, 孔径分布

Abstract: The t2 distribution of rock nuclear magnetic resonance can well reflect the feature of rock pore structure. But by transfer relation between the t2 distribution and the mercury injection curve, it is hard to get the unified coefficient value, leading to big errors in application. This paper presents the standard physical model based on the relaxation mechanism of rock nuclear magnetic resonance, determines the transfer coefficient between t2 and pore radius and develop the mathematical transform model between them through image and nuclear magnetic resonance analysis. This model provides a new method for rock pore character analysis, by which good applied results are gained.

Key words: nuclear magnetic resonance, rock pore structure, pore size distribution

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