Method for stimulating an oilfield comprising using...

E - Fixed Constructions – 21 – B

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E21B 37/06 (2006.01) C09K 8/52 (2006.01) C23F 11/10 (2006.01) E21B 43/14 (2006.01) E21B 43/20 (2006.01)

Patent

CA 2529895

The relates to a method for stimulating an oilfield by injecting an inflow stream of a fluid into an oil producing well linked to the oilfield, displacing the oil and recovering an outflow steam of fluid comprising the oil, wherein at least two streams are injected into at least two production zones of an oil well or are injected into at least two different oil producing wells from which at least two outflow streams from the two zones or wells are combined before recovering, with a scale inhibitor having detectable moieties being introduced into the oilfield(s) and/or into the fluid, characterized in that two different scale inhibitors are used, dedicated to the two zones or wells, said different scale inhibitors having different detectable moieties that can be distinguished by analyzing.

L'invention concerne un procédé pour stimuler un champ pétrolifère consistant à injecter un flux d'entrée d'un fluide dans un puits de production de pétrole lié au champ pétrolifère, à déplacer le pétrole et à récupérer un flux de sortie de fluide contenant le pétrole, au moins deux flux étant injectés dans au moins deux zones de production d'un puits de pétrole ou dans au moins deux différents puits de production de pétrole desquels au moins deux flux de sortie provenant des deux zones ou puits sont combinés avant récupération, au moyen d'un antitartre à parties détectables introduit dans le (les) champ(s) pétrolifère(s) et/ou dans le fluide. Ledit procédé se caractérise en ce que deux différents antitartres sont utilisés, lesquels antitartres sont affectés aux deux zones ou puits et présentent différentes parties détectables pouvant être distinguées par une analyse.

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