Abstract: The invention relates to the use of at least one compound corresponding to the formula below: R—O—(—CH2—CH(—CH3)—O—)m—(—CH2—CH2—O—)n—H in which: R is a hydrocarbon-based group comprising from 6 to 40 carbon atoms; m is a number ranging from 0 to 20; n is a number greater than 20; for inhibiting the anionic-surfactant retention phenomena in an oil reservoir, especially in a carbonate-based or argillaceous reservoir.

Abstract: The invention relates to the use of at least one compound corresponding to the formula below: R—O—(—CH2—CH(—CH3)—O—)m—(—CH2—CH2—O—)n—H in which: R is a hydrocarbon-based group comprising from 6 to 40 carbon atoms; m is a number ranging from 0 to 20; n is a number greater than 20; for inhibiting the anionic-surfactant retention phenomena in an oil reservoir, especially in a carbonate-based or argillaceous reservoir.

Abstract: The inhibition of anionic surfactant retention phenomena in an oil reservoir, especially in a carbonate-based or argillaceous reservoir, by the use of at least one compound corresponding to the formula R—O-(A)m-H, in which R is a hydrocarbon-based group comprising from 6 to 40 carbon atoms, A is a hexose or pentose unit, and m is a non-zero number ranging from 1 to 10, is described herein.

Abstract: Provided is a process of enhanced oil recovery from an oil reservoir of an underground formation by using a compound of formula (I) to inhibit the phenomena of retention of anionic surfactants within an oil-bearing reservoir, such as a carbonate or clay reservoir: R—O—(—CH2—CH(—CH3)—O—)m—(—CH2—CH2—O—)n—H, wherein: R is a hydrocarbon-based group comprising from 6 to 40 carbons; m ranges from 0 to 20; n is greater than m and ranges from 5 to 40.

Abstract: The present disclosure relates to the use of at least one compound corresponding to the formula below: R—O-(A)m-H in which: R is a hydrocarbon-based group comprising from 6 to 40 carbon atoms, A is a hexose or pentose unit, m is a non-zero number ranging from 1 to 10, for inhibiting the anionic-surfactant retention phenomena in an oil reservoir, especially in a carbonate-based or argillaceous reservoir.

Abstract: The invention relates to the use of at least one compound corresponding to the following formula: R—O—(—CH2-CH(CH3)-O-)m-(—CH2-CH2-0-)u-H where: R is a hydrocarbon-based group comprising from 6 to 40 carbons; m ranges from 0 to 20; n, which is greater than m, ranges from 5 to 40, in order to inhibit the phenomena of retention of anionic surfactants within an oil-bearing reservoir, in particular within a carbonate or clay reservoir.

Abstract: An enhanced oil recovery method using injection of aqueous polymer solutions into the reservoir rock, includes the stages of: injecting a first aqueous solution of non-associative hydrophilic polymers into the reservoir in a predetermined proportion so that they adsorb on the reservoir rock; and then injecting a second aqueous solution of associative polymers into the reservoir for oil recovery, with limited adsorption considering the adsorption of the non-associative polymers of the first solution.

Abstract: 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.

Abstract: The present invention relates to a method of treating porous and permeable underground formations or cavities of reservoir rock or sand foundation type. The method consists in injecting a liquid composition comprising microgels into the formations in order to reduce the production of water, gas or sands, and/or for zone abandonment.

Abstract: The present invention relates to an optimized method for modelling flows in a geological hydrocarbon reservoir, comprising injecting an aqueous polymer solution to sweep the hydrocarbons, determining a relationship between a parameter linked with the mobility reduction of the solution in the reservoir and the water saturation, and accounting for this relationship in a flow simulator to achieve modelling.

Abstract: The present invention relates to an enhanced oil recovery method using injection of aqueous polymer solutions into the reservoir rock, wherein the following stages are carried out: injecting a first aqueous solution of non-associative hydrophilic polymers into the reservoir in a predetermined proportion so that they adsorb on the reservoir rock, injecting a second aqueous solution of associative polymers into the reservoir for oil recovery, with limited adsorption considering the adsorption of the non-associative polymers of the first solution.

Abstract: 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.

Abstract: The present invention relates to an optimized method for modelling flows in a geological hydrocarbon reservoir, comprising injecting an aqueous polymer solution to sweep the hydrocarbons, determining a relationship between a parameter linked with the mobility reduction of the solution in the reservoir and the water saturation, and accounting for this relationship in a flow simulator to achieve modelling.

Abstract: The present invention relates to a method of treating porous and permeable underground formations or cavities of reservoir rock or sand foundation type. The method consists in injecting a liquid composition comprising microgels into the formations in order to reduce the production of water, gas or sands, and/or for zone abandonment.

Abstract: The present invention relates to a method for preparing microgels of controlled size. According to the method, a gelling composition comprising a polymer and a crosslinking additive intended for the polymer is injected into a porous and permeable medium, and a monodisperse solution of microgels of substantially constant size is recovered at the outlet. The invention also relates to an application of the method for reducing the permeability of porous and permeable formations of reservoir rock type.

Abstract: The invention relates to a process for reducing or completely stopping a water inflow from a formation towards a producing well.The process according to the invention, using the injection of an aqueous dispersion of hydrosoluble polysaccharide in this producing well, blocks the water inflow without however decreasing the oil and gas flow towards this well.This process is particularly of high interest when the produced water is hot, e.g. at a temperature from 70.degree. to 130.degree. C., and/or salted, e.g. of a salt content of at least 30 g/l.This process is used for oil and/or gas production.