Method of treating oil or gas well with biodegradable emulsion

Details Method of treating oil or gas well with biodegradable emulsion Method of treating oil or gas well with biodegradable emulsion

C - Chemistry, Metallurgy

09

K

C09K 8/536 (2006.01) E21B 37/06 (2006.01)

Patent

CA 2570157

A biodegradable water-in-synthetic oil base emulsion, effective in the removal of filter cakes, consists of an external phase of a surfactant emulsified in a paraffinic base oil. The emulsion is particularly effective in breaking-down the interfacial rheological properties of oil base mud and synthetic oil base mud filter cakes and acts as a demulsifier to break the water-in-oil emulsions present in such oil base and synthetic oil base muds.

Une émulsion biodégradable à base d'eau dans une huile synthétique, efficace pour éliminer les gâteaux de filtration, est constituée d'une phase externe d'un agent tensio-actif émulsifié dans une huile de base paraffinique. L'émulsion est particulièrement efficace pour dégrader les propriétés rhéologiques interfaciales des gâteaux de filtration de la boue à base d'huile et de la boue à base d'huile synthétique; elle agit comme désémulsifiant des émulsions d'eau dans l'huile présentes dans de telles boues à base d'huile ou à base d'huile synthétique.

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