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Methods and apparatus to characterize stock-tank oil during fluid composition analysis

  • US 7,586,087 B2
  • Filed: 04/20/2007
  • Issued: 09/08/2009
  • Est. Priority Date: 01/24/2007
  • Status: Active Grant
First Claim
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1. A method to characterize a fluid associated with an underground geological formation, the method comprising:

  • obtaining a sample comprising the fluid associated with the underground geological formation;

    measuring, in a borehole associated with the underground geological formation, an optical property of the fluid, wherein the optical property is measured by a grating spectrometer and filter-array spectrometer;

    determining, in the borehole, a stock-tank oil type for the sample associated with the underground geological formation, wherein the stock-tank oil type is determined based on the optical property; and

    determining a property of the sample associated with the underground geological formation based on the stock-tank oil type.

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