Patent ID: 6388251
Filing Date: 2002-05-14
Classification: E21B,G01N

Abstract:
A formation tester tool for analyzing a formation fluid in a formation surrounding a wellbore having a borehole fluid, the tester tool comprising:(a) a reflectance crystal in contact with the formation fluid in the formation; (b) a first optical channel for carrying monochromatic incident light having a wavelength from a source thereof to the reflectance crystal, said reflectance crystal having a surface angled at a critical angle; (c) a second optical channel for carrying light reflected from within the reflectance crystal, said reflected light responsive to an absorbance of the formation fluid at said wavelength; (d) an optical assembly for providing signals indicative of the energy of the incident light and the reflected light; and (e) a processor for determining said absorbance of the formation fluid at said wavelength from the signals indicative of the energy of the incident light and the reflected light.