ADDITIVES FOR ELIMINATING FRACTURING FLUIDS USED FOR OIL EXTRACTION

The invention relates to a method for extracting a crude oil contained in a geological formation, which comprises a step of fracturing said geological formation, by injection of a specific aqueous extraction fluid under pressure, which contains at least one surfactant that reduces the interfacial te...

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Bibliographische Detailangaben
Hauptverfasser:	CHABERT, Max, CHEVALLIER, Eloise
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ADHESIVES CHEMISTRY DYES EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MINING MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS PAINTS POLISHES
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Beschreibung
Zusammenfassung:	The invention relates to a method for extracting a crude oil contained in a geological formation, which comprises a step of fracturing said geological formation, by injection of a specific aqueous extraction fluid under pressure, which contains at least one surfactant that reduces the interfacial tension between the extraction fluid and the crude oil to be extracted to below 0.1 mN/m; followed by a discharge step ("flowback"). The invention likewise relates to the original fracturing fluids used in this method, and the additives used in these fracturing fluids. L'invention concerne un procédé d'extraction d'une huile pétrolière contenue dans une formation géologique, comprenant une étape de fracturation de ladite formation géologique, par injection sous pression d'un fluide d'extraction aqueux particulier, qui contient au moins un tensioactif qui abaisse la tension interfaciale entre le fluide d'extraction et l'huile pétrolière à extraire en deçà de 0,1 mN/m; puis une étape d'évacuation («flowback»). L'invention concerne également les fluides de fracturations originaux mis en œuvre dans ce procédé, et les additifs employés dans ces fluides de fracturation.