Rhodia Operations

Ifp Energies Nouvelles

Guillaume Degre

Mikel Morvan

Marie-Pierre Labeau

Derek Pakenham

Isabelle Henaut

Jean-Francois Argillier

René Tabary

Jean-François Argillier

Rajesh Ranjan

Rene Tabary

Mikal Morvan

An amine adduct is made by (1) forming an addition intermediate by heating a mixture comprising at least one diene and at least one unsaturated fatty acyl compound, and reacting the addition intermediate with a diamine to form the amine adduct, or by (2) reacting at least one unsaturated fatty acyl compound with at least one diamine to form an amine intermediate, and heating a mixture of the amidoamine intermediate and at least one diene to form the amine adduct, or by (3) reacting at least one unsaturated fatty tertiary amine compound with at least at least one diene to form the amine adduct. A surfactant composition is derived from the amine adduct and is particularly useful in a method for enhancing the recovery of oil from a reservoir having a production wellbore, comprising introducing an aqueous flooding fluid into the reservoir at one or more locations different from the location of the production wellbore, said fluid comprising the surfactant composition and recovering the oil through the production wellbore.

Amine adducts, derivatives thereof, methods for making such adducts and derivatives, and methods for using such adducts and derivatives

The present invention relates to a method for the enhanced recovery of oil from an underground formation, in which a viscoelastic aqueous fluid comprising at least one viscosifying zwitterionic surfactant is injected into the said formation and the said fluid is conducted through this formation in order to displace the oil from the formation and to recover it via a different point from that where the viscoelastic aqueous fluid was introduced, characterized in that the said fluid exhibits an amount of a base sufficient to bring its pH to a value of greater than 10, preferably of between approximately 11 and 13.

Viscoelastic composition with improved stability

The present invention relates to a method for the assisted recovery of crude oil from an underground formation, comprising: a) injecting, via at least one injection means in contact with the underground formation containing the crude oil, a liquid containing a mixture of at least: i) a salty aqueous medium, ii) a mixture of two zwitterionic viscosising surfactants or a mixture of two populations of said surfactants having a bimodal characteristic of the narrow distribution of Ri groups as defined below, in a weight content of between 1 and 0.05 wt %, preferably between 0.5 and 0.1 wt %, and more preferably between 0.4 and 0.15 wt %, such that the liquid has an oil/water interface tension of about 10 mN/m (milinewton per meter) or less as measured at room temperature (25&#xb0; C.) and a viscosity of about 3 cPs or more as measured at a temperature of 80&#xb0; C. for a shearing gradient of 10 s, and corresponding to formula (1) where the two Ri radicals of the two surfactants or surfactant populations have a difference in the number of carbon atoms thereof that is at least greater than or equal to 4. The method comprises using at least one production means located at a different location than that at which the liquid or the polymer has been fed in order to recover the liquid containing the crude oil. 

Viscoelastic composition with improved viscosity

The invention relates to an enhancing oil recovery method by injecting into a subterranean oil formation an aqueous flooding fluid comprising at least one injecting galactomannan polymer substituted by at least one sulfonation agent. The invention also relates to an flooding fluid having better injectivity properties than existing flooding fluids.

Flooding fluid and enhancing oil recovery method

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Talence, France

Guillaume Degre