Eni S.p.a.

Polimeri Europa S.p.a.

Versalis S.p.a.

Lucilla Del Gaudio

Paola Albonico

Alessandra Belloni

Davide Moscatelli

Thomas Paul Lockhart

Alberto Cesana

Rossella Bortolo

Roberto Tassinari

Sandra Cobianco

Maria Andrei

Giuseppe Leo

Giuseppe Ripa

Chiara Neva Emiliani

Emanuele Vignati

Andrea Sliepcevich

Giulia Luisa Eleonora Bozzano

Iole Moroni

Claudio Riccardo Pratesi

Massimo Silvio Morbidelli

Roberto Lorefice

Giulia Luisa Bozzano

A treatment fluid may be suitable for a hydrocarbon fluid extraction well. Such a treatment fluid may include a water-in-oil emulsion. The water-in-oil emulsion may include: an oily continuous phase; and an aqueous discontinuous phase comprising water and a plurality of particles comprising a hydrogel comprising a cationic polymer. The cationic polymer may include, in polymerized form, a monomer with one or more cationic groups. The cationic group may be a —N—RRRgroup, wherein R, R, and R, are independently H or a Cto Calkyl group.

Formulation for inhibiting water permeation in an extraction well of a hydrocarbon fluid from an underground reservoir

A method for inhibiting water permeation in an extraction well of a hydrocarbon fluid from an underground reservoir may include: supplying a water-in-oil emulsion including an oily continuous phase and an aqueous discontinuous phase containing a plurality of particles of at least one hydrogel containing a cationic polymer; and positioning the water-in-oil emulsion in contact with the underground reservoir. A treatment fluid for hydrocarbon fluid extraction wells may contain a water-in-oil emulsion including an oily continuous phase and an aqueous discontinuous phase containing a plurality of particles of at least one hydrogel containing a cationic polymer.

Method for inhibiting water permeation in an extraction well of a hydrocarbon fluid from an underground reservoir

The present invention relates to a composition for inhibiting water permeation in an extraction well of a hydrocarbon oil from an underground reservoir which comprises injecting into said reservoir at least one polymerizable composition comprising: The present invention also relates to the polymerizable compositions that can be used in said method.

Method for inhibiting water permeation in an extraction well of a hydrocarbon oil from an underground reservoir

The present invention relates to a method for inhibiting water permeation in an extraction well of a hydrocarbon oil from an underground reservoir which comprises injecting into said reservoir at least one polymerizable composition comprising: at least one hydrophilic monomer, -at least one hydrophilic initiator of radical polymerization with thermal activation (hydrophilic initiator), at least one lipophilic initiator of radical polymerization with thermal activation (lipophilic initiator). The present invention also relates to the polymerizable compositions that can be used in said method.

A method for inhibiting the permeation of water in an extraction well of a hydrocarbon fluid from an underground reservoir is described. The method includes the injection of at least one treatment fluid into the underground reservoir. The treatment fluid contains at least one emulsion or dispersion in an organic solvent of at least one copolymer of a first monomer of an acrylic monomer or a methacrylic monomer, and a second monomer having at least one ethylene unsaturation and at least one polyoxyethylene chain. The emulsion or dispersion of the copolymer used in the method is also described.

Method for inhibiting the permeation of water in an extraction well of a hydrocarbon fluid from an underground reservoir

A process for the recovery of heavy oil from an underground reservoir, comprising: injecting an oil-in-water nanoemulsion into one or more injection wells; recovering said heavy oil from one or more production wells. Said process is particularly advantageous for enhancing the recovery of heavy oils from underground reservoirs within the range of technologies for tertiary recovery, usually known as 'EOR' (Enhanced Oil Recovery').

Process for the recovery of heavy oil from an underground reservoir

Process for the preparation of a water-in-oil or oil-in-water nanoemulsion wherein the dispersed phase is distributed in the dispersing phase in the form of droplets having a diameter ranging from 1 to 500 nm, comprising:

Process for the preparation of water-in-oil and oil-in-water nanoemulsions

Process for the removal of deposits from an oil or gas well, and/or from surface structures, and/or from the equipment connected therewith, and/or from hydrocarbon-bearing formations, comprising:&#x2014;injecting at least one oil-in-water nanoemulsion into said oil or gas well, and/or surface structures, and/or equipment connected therewith, and/or hydrocarbon bearing formations; leaving said nanoemulsion in said oil or gas well, and/or surface structures, and/or equipment connected therewith, and/or hydrocarbon bearing formations, for a predetermined time.

Process for the removal of deposits from an oil or gas well, and/or from the surface structures, and/or from the equipment connected therewith, and/or from hydrocarbon bearing formations

The present invention relates to a process for the recovery of bitumen from an oil sand comprising the following phases in succession: (a) mixing an oil sand with a diluent capable of reducing the viscosity and density of the bitumen contained in said oil sand, obtaining a first mixture (slurry) comprising diluted bitumen; (b) mixing said slurry with a basic aqueous solution (BAS) possibly containing salts to increase its ionic strength, capable of removing said diluted bitumen from said oil sand containing it, obtaining a second mixture (BAS-slurry) which can be separated into (i) a liquid phase comprising said diluted bitumen, a fraction of oil sand free of the bitumen removed and water; (ii) a sediment comprising the remaining fraction of said oil sand free of the bitumen removed, water and residual hydrocarbons which can be eliminated by subsequent washings; (c) separating a liquid phase comprising said diluted bitumen removed, from said BAS-slurry mixture; (d) recovering, from said liquid phase separated in phase (c), the removed diluted bitumen contained therein.

Process for the recovery of bitumen from an oil sand

The invention relates to the use of quaternary polyamines having formula (I) for the recovery of oil from reservoirs formula (I), wherein n&#x3e;=1 Rrepresents H, CH, CHCH, CHRrepresents HCHOHCH, CH, CHCH&#x2550;CHRrepresents CH, CHCH, CHRrepresents CH, CHCH&#x2550;CHwhen Rand Rare allyl group, they can jointly form aliphatic cyclic structures, the ratio between the carbon atoms and nitrogen atoms (C/N) ranges from 2 to 30. 

Additives for oil recovery from reservoirs

A water-based fluid, containing: a non-ionic surfactant, which is stable in a temperature range from 10 to 90&#xb0; C. and soluble in water; and a salt, wherein the non-ionic surfactant contains an alkyl polyglucoside selected from the group consisting of a Calkyl polyglucoside, a Calkyl polyglucoside, and mixtures thereof, and the salt is present, and is present in an amount up to 60%. In addition, a process for preventing the formation of a W/O inverse emulsion or resolving a W/O inverse emulsion that has already formed in an oil well in which an oil-based mud has been employed by injecting the water-based fluid into the oil well.

Water-based fluid for preventing the formation of W/O emulsions or for resolving W/O emulsions already formed in porous matrices

Process for the preparation of a water-in-oil or oil-in-water nanoemulsion wherein the dispersed phase is distributed in the dispersing phase in the form of droplets having a diameter ranging from 1 to 500 nm, comprising: 1) the preparation of a homogeneous water/oil blend (I) characterized by an interface tension lower than 1 mN/m, comprising water in an amount of 30 to 70% by weight, at least two surface-active agents having a different HLB, selected from non-ionic, anionic, polymeric surface-active agents, said surface-active agents being present in such a quantity as to make the blend homogeneous; 2) the dilution of the blend (I) in a dispersing phase consisting of oil or water with the addition of a surface-active agent, selected from non-ionic, anionic, polymeric surface-active agents, the quantity of the dispersing phase and surface-active agent being such as to obtain a nanoemulsion having a HLB different from that of the blend (I).

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San Donato Milanese, Italy

Lucilla Del Gaudio