A novel fluid system having controllable reversible viscosity

Details A novel fluid system having controllable reversible viscosity A novel fluid system having controllable reversible viscosity

E - Fixed Constructions

21

B

E21B 43/27 (2006.01) C09K 8/62 (2006.01) C09K 8/74 (2006.01) C09K 8/86 (2006.01) E21B 43/25 (2006.01)

Patent

CA 2469259

This Invention relates to methods of treating a subterranean hydrocarbons reservoir comprising contacting the formation with a treating fluid comprising an aqueous solution, an acid, a surfactant acting as gelling agent essentially consisting of erucylamidopropyl betaine (or a protonated/deprotonated homolog or salt thereof). The treating fluid may further comprise a lower n-alcohol for improved temperature stability.

L'invention concerne des procédés de traitement de réservoir d'hydrocarbures souterrain. Ces procédés consistent à mettre cette formation en contact avec un liquide de traitement contenant une solution aqueuse, un acide, un tensioactif agissant en tant qu'agent de gélification, ce dernier étant sensiblement constitué d'érucylamidopropyle bétaïne (ou un homologue protoné/déprotoné ou un sel de celui-ci). Ce liquide de traitement peut également contenir un n-alcool inférieur destiné à améliorer la stabilité de la température.

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