G - Physics – 01 – V
Patent
G - Physics
01
V
G01V 11/00 (2006.01) E21B 47/00 (2006.01)
Patent
CA 2748366
The present invention is a method and apparatus for determining oil based mud contamina-tion of a hydrocarbon fluid obtained from a wellbore during a formation testing. The invention includes re-ceiving a model for simulating the contamination and receiving an empirical equation for computing the contamination. At a given pumping time, a simulated contamination is generated based on the model and an empirically computed contamination is generated based on the first empirical equation. The simulated contamination and empirically computed contamina-tion are compared and a determination as to which is more reliable is made. Revision of the first model or first empirical equation based is then performed.
L'invention concerne un procédé et un appareil permettant de déterminer la contamination par boues à base d'huile d'un fluide d'hydrocarbure issu d'un puits de forage lors des tests de formation. L'invention consiste à recevoir un modèle de simulation de contamination et à recevoir une équation empirique pour calculer la contamination. A un moment de pompage donné, une contamination simulée est générée en fonction de la première équation empirique. La contamination simulée et la contamination calculée de manière empirique sont comparées, et on détermine laquelle est la plus fiable. On effectue ainsi une révision du premier modèle ou de la première équation empirique.
Lin Chen
Niu Yuqiang
North Robert
Schlumberger Canada Limited
Smart & Biggar
LandOfFree
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