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Methods and apparatus for determining gas-oil ratio in a geological formation through the use of spectroscopy

  • US 5,939,717 A
  • Filed: 01/29/1998
  • Issued: 08/17/1999
  • Est. Priority Date: 01/29/1998
  • Status: Expired due to Term
First Claim
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1. A method for determining gas-oil ratio in a geological formation, said method comprising:

  • a) subjecting in situ formation fluid to NIR illumination;

    b) detecting a spectrum of NIR absorption in the formation fluid;

    c) measuring NIR absorption at a wavelength associated with gas and at a wavelength associated with oil; and

    d) calculating the ratio of the gas NIR absorption to the oil NIR absorption.

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