High accuracy contamination estimation in hydrocarbon...

G - Physics – 01 – N

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G01N 30/46 (2006.01) E21B 49/08 (2006.01) G01N 33/28 (2006.01)

Patent

CA 2667523

A method of estimating contamination of oil based mud filtrate in a hydrocarbon sample. The method comprising the steps of obtaining a hydrocarbon sample contaminated with oil based mud filtrate, then analyzing the contaminated hydrocarbon sample using two-dimensional gas chromatography (GC x GC). The method further comprises identifying one or more unique component or tracer in the oil based mud filtrate in the contaminated hydrocarbon sample. Finally, the method comprises of summing the peak volumes of the one or more unique component or tracer, relative to the peak volumes of a clean hydrocarbon sample.

L'invention concerne un procédé d'estimation de la contamination d'un filtrat de boue à base d'huile dans un échantillon d'hydrocarbures. Le procédé comprend les étapes consistant à obtenir un échantillon d'hydrocarbures contaminé par un filtrat de boue à base d'huile, puis à analyser l'échantillon d'hydrocarbures contaminé au moyen de la chromatographie en phase gazeuse bidimensionelle (GC x GC). Le procédé comprend également l'identification d'un ou de plusieurs composants uniques ou traceurs dans le filtrat de boue à base d'huile dans l'échantillon d'hydrocarbures contaminé. Le procédé comprend enfin la réalisation de la somme des volumes de pointe du ou des composants uniques ou traceurs et sa comparaison avec les volumes de pointe d'un échantillon d'hydrocarbures propre.

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