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Method and apparatus for downhole spectral analysis of fluids

  • US 7,379,180 B2
  • Filed: 01/26/2006
  • Issued: 05/27/2008
  • Est. Priority Date: 01/26/2006
  • Status: Active Grant
First Claim
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1. A fluid analysis system configured to operate downhole in a well traversing a formation comprising:

  • at least one light source generating an input light;

    a sample cell operably connected to said at least one light source receiving a sample fluid therein, said sample cell further comprising;

    at least one input window allowing said input light to flow into said sample cell and through the sample fluid to produce an output light;

    at least one output window allowing said output light to flow out of said sample cell;

    at least a first spectrometer operably connected to the output of said sample cell and being configured to measure said output light and generate a plurality of measurement signals;

    an analysis device operably connected to outputs of said first spectrometer and being configured to receive said plurality of measurement signals and determine properties of the sample fluid;

    at least a second spectrometer operably connected to said at least one light source and being configured to measure said input light and generate a plurality of reference signals;

    a calibration device operably connected to outputs of said second spectrometer and being configured to receive said plurality of reference signals and calibrate said first spectrometer and other electronics.

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