US 7,601,950 B2
System and method for downhole optical analysis
Tobias Kischkat, Niedersachsen (Germany); Stefen Sroka, Niedersachsen (Germany); and Peter Schaefer, GroB Kreutz (Germany)
Assigned to Baker Hughes Incorporated, Houston, Tex. (US)
Filed on Sep. 25, 2007, as Appl. No. 11/860,821.
Prior Publication US 2009/0078860 A1, Mar. 26, 2009
Int. Cl. G01V 5/08 (2006.01)
U.S. Cl. 250—269.1 26 Claims
OG exemplary drawing
 
1. A method for estimating an optical property of a fluid downhole, the method comprising:
detecting light interacting with the fluid downhole;
measuring an integral of the detected light with respect to time for an integration time; and
estimating the optical property from a difference between a starting value and an ending value for the integral divided by the integration time.