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Nuclear magnetic resonance method and logging apparatus for fluid analysis

  • US 6,891,369 B2
  • Filed: 12/13/2002
  • Issued: 05/10/2005
  • Est. Priority Date: 08/13/1998
  • Status: Expired due to Term
First Claim
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1. A method of extracting information about a fluid 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).

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