E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 33/138 (2006.01) C09K 8/512 (2006.01)
Patent
CA 2195096
The production of excessive water in oil and gas wells and other subterranean formations is reduced by introducing a hydrocarbon fluid containing dispersed superabsorbing particles formed using invert emulsion polymerization techniques wherein the superabsorbing particles are formed from hydratable polymers which are cross-linked so that they are insoluble in water. By introducing these superabsorbing particles into fluid passages of the formation, the water producing zones can be selectively blocked off by allowing the superabsorbing particles to swell with the absorption of water within the aqueous fluid containing fluid passages, while the superabsorbing particles remain small and unswollen in the hydrocarbon conducting fluid passages. Thus, the ability of fluids to flow through the aqueous fluid containing fluid passages is selectively reduced resulting in the reduced production of aqueous fluids while maintaining production of hydrocarbons.
Il est possible de réduire les infiltrations excessives d'eau dans les puits de pétrole et de gaz et autres formations souterraines en y injectant un hydrocarbure dans lequel sont dispersées des particules superabsorbantes obtenues par des techniques de polymérisation par émulsion inverse consistant à former lesdites particules à partir de polymères hydratables rendus insolubles dans l'eau par réticulation. L'introduction de ces particules dans les anfractuosités de la formation permet de colmater d'une manière sélective les zones de production d'eau; en effet, les particules superabsorbantes se trouvant dans les veines de production de fluide aqueux gonflent, tandis que celles se trouvant dans les veines de production d'hydrocarbures ne gonflent pas et conservent leur petite taille. La capacité d'écoulement dans les veines de fluide aqueux ainsi réduite de manière sélective limite les arrivées de fluide aqueux tandis que la production d'hydrocarbures reste inchangée.
Dawson Jeffrey Carl
Le Hoang Van
Bj Services Company
Bj Services Company Canada
Gowling Lafleur Henderson Llp
LandOfFree
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