System and method for estimating filtrate contamination in...

Details System and method for estimating filtrate contamination in... System and method for estimating filtrate contamination in...

2007-04-04

2008-11-04

Soderquist, Arlen (Department: 1797)

Chemistry: analytical and immunological testing

Geochemical, geological, or geothermal exploration

For petroleum oils or carbonaceous minerals

C166S066000, C166S100000, C166S250030, C166S264000, C356S128000, C436S028000, C436S030000, C436S139000, C436S164000

Reexamination Certificate

active

07445934

ABSTRACT:
A method and apparatus is described for estimating terminal purity or terminal contamination for a fluid during the withdrawal of the fluid from a subsurface formation. The apparatus and method provide for measuring refractive index of the fluid over a time period, fitting a curve through the refractive index measurements or data values derived therefrom and estimating a terminal refractive index or terminal value for the data values from the fitted to curve to estimate the terminal contamination or purity for the fluid.

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