Nuclear magnetic resonance method and logging apparatus for fluid analysis
    2.
    发明授权
    Nuclear magnetic resonance method and logging apparatus for fluid analysis 有权
    核磁共振法和流体分析测井仪

    公开(公告)号:US06891369B2

    公开(公告)日:2005-05-10

    申请号:US10318798

    申请日:2002-12-13

    摘要: The present invention discloses a diffusion edited pulse technique that allows information about a fluid to be extracted, comprising: a) obtaining a fluid sample; b) generating a sequence of magnetic field pulses in the fluid, the sequence comprising an initial magnetic field pulse, a first portion that follows the initial magnetic field pulse, and a second portion that follows the first portion; c) detecting magnetic resonance signals using the second portion of the sequence; d) modifying the first portion of the sequence, and repeating steps (b) and (c); and e) extracting information about the fluid by determining relaxation and diffusion characteristics and their correlation based on the signals detected in steps (c) and (d). Also disclosed is a logging tool equipped with a processor to implement the diffusion edited pulse technique.

    摘要翻译: 本发明公开了一种允许提取关于流体的信息的扩散编辑脉冲技术,包括:a)获得流体样品; b)在流体中产生一系列磁场脉冲,该序列包括初始磁场脉冲,跟随初始磁场脉冲的第一部分和跟随第一部分的第二部分; c)使用序列的第二部分检测磁共振信号; d)修饰序列的第一部分,并重复步骤(b)和(c); 以及e)基于步骤(c)和(d)中检测到的信号,通过确定松弛和扩散特性及其相关性来提取关于流体的信息。 还公开了一种装备有处理器来实现扩散编辑脉冲技术的测井工具。

    Nuclear magnetic resonance method and logging apparatus
    3.
    发明授权
    Nuclear magnetic resonance method and logging apparatus 有权
    核磁共振法和测井仪

    公开(公告)号:US06570382B1

    公开(公告)日:2003-05-27

    申请号:US09723803

    申请日:2000-11-28

    IPC分类号: G01V300

    摘要: NMR methods for extracting information about a fluid in rock and logging apparatuses for implementing such methods in a borehole environment are provided. The methods involve generating at least two different magnetic field pulse sequences. The magnetic field pulse sequences include a first portion and a second portion. A magnetic field pulse sequence is generated, and magnetic resonance signals are detected using the second portion of the sequence. The first portion of the sequence is modified, and again the sequence generated and magnetic resonance signals detected using the second portion. The magnetic resonance signals are analyzed, and information about, for example, diffusion coefficient, viscosity, composition, saturation in a rock, pore size, pore geometry and the like, extracted from the analyzed signals.

    摘要翻译: 提供了用于在井眼环境中实施这种方法的用于提取关于岩石中的流体的信息和测井装置的NMR方法。 该方法包括产生至少两个不同的磁场脉冲序列。 磁场脉冲序列包括第一部分和第二部分。 产生磁场脉冲序列,并使用序列的第二部分检测磁共振信号。 序列的第一部分被修改,并且再次产生序列并使用第二部分检测磁共振信号。 分析磁共振信号,从分析的信号中提取关于例如扩散系数,粘度,组成,岩石中的饱和度,孔径,孔几何形状等的信息。