Patent ID: 6437326
Filing Date: 2002-08-20
Classification: B08B,E21B,G01N

Abstract:
A system for measuring characteristics of a fluid being produced in a wellbore, comprising:a) an uphole light source means for producing a high amplitude near infrared (NIR) signal; b) a plurality of optical cells, each optical cell including at least two optical windows in contact with the wellbore fluid, said plurality of optical cells being located downhole and fixed at various different locations along the wellbore; c) a fiber optic system coupled to said uphole light source means and to said plurality of optical cells, including means for carrying light of said high amplitude NIR signal to first of said at least two windows of said plurality of optical cells such that at least a portion of said high amplitude NIR signal traverses the wellbore fluids at said optical cells thereby producing resulting NIR light signals detected at second of said at least two windows of said plurality of optical cells, and for carrying said resulting NIR light signals from said optical cells uphole; d) uphole means coupled to said fiber optic system for analyzing amplitudes of said resulting NIR light signals at selected NIR wavelengths and for determining from said amplitudes constituents of the fluid at said various different locations.