公开(公告)号：US20200332173A1

公开(公告)日：2020-10-22

申请号：US16957584

申请日：2018-12-28

Applicant: ENI S.P.A.

Inventor： Elisa DI BIASE ,  Matia MINELLI ,  Davide MOSCATELLI ,  Azzurra AGOSTINI

IPC: C09K8/512 ,  E21B21/00 ,  E21B33/138

Abstract: A method for controlling the permeability of an oil well includes the steps of preparing a polymerizable bicomponent system having at least a fluid with at least an olefinically unsaturated first polymerizable compound; optionally, at least one radical polymerization initiator IA, the initiator IA being activated thermally or in the presence of an accelerating compound and a fluid with a radical polymerization activator, the activator being selected from: a radical polymerization initiator IB for polymerizing the polymerizable compound, the initiator IB having an activation temperature equal to or lower than the temperature of the thief zone, an accelerator of the initiator IA, The method further includes injecting one of the fluids into the well annulus until the thief zone is reached, and injecting the remainder into the tubular element, until it comes into contact with the fluid injected through the annulus to form a blocking polymer at the thief zone.

公开(公告)号：US20210163692A1

公开(公告)日：2021-06-03

申请号：US17267894

申请日：2019-08-19

Applicant: ENI S.P.A.

Inventor： Stefano CARMINATI ,  Giuseppe MADDINELLI ,  Davide MOSCATELLI ,  Mattia SPONCHIONI

IPC: C08G81/02 ,  C08F293/00 ,  C09K8/508 ,  E21B43/16

Abstract: A fluid for controlling the permeability of a subterranean formation having an aqueous solution of at least one thermo-responsive polymer with block structure A-B-A′, wherein A and A′, the same as or different from one another, each represent a thermo-responsive oligomer group, and B is an oligomer group having n repeat units, the same as or different from one another. At least one of the repeat units has a solubility of the corresponding monomer, in water at 20° C., equal to or greater than 120 g/l, and
n is a whole number within the range 30-1000.
The fluid is also used in a method for controlling the permeability of a subterranean formation.

公开(公告)号：US20240026210A1

公开(公告)日：2024-01-25

申请号：US18373322

申请日：2023-09-27

Applicant: ENI S.P.A.

Inventor： Davide MOSCATELLI ,  Lucilla DEL GAUDIO ,  Paola ALBONICO ,  Alessandra BELLONI ,  Alberto CESANA

IPC: C09K8/502 ,  C09K8/516 ,  C09K8/588 ,  E21B43/20

CPC classification number: C09K8/502 ,  C09K8/516 ,  C09K8/588 ,  E21B43/20

Abstract: 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+—R1R2R3 group, wherein R1, R2, and R3, are independently H or a C1 to C4 alkyl group.

公开(公告)号：US20200277524A1

公开(公告)日：2020-09-03

申请号：US16326623

申请日：2017-08-22

Applicant: ENI S.P.A.

Inventor： Lucilla DEL GAUDIO ,  Davide MOSCATELLI ,  Paola ALBONICO

IPC: C09K8/512 ,  C09K8/58 ,  C08F220/06 ,  C08F220/28

Abstract: 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.

公开(公告)号：US20220169910A1

公开(公告)日：2022-06-02

申请号：US17440985

申请日：2020-03-19

Applicant: ENI S.P.A.

Inventor： Davide MOSCATELLI ,  Lucilla DEL GAUDIO ,  Paola ALBONICO ,  Alessandra BELLONI ,  Alberto CESANA

IPC: C09K8/502 ,  C09K8/516 ,  C09K8/588 ,  E21B43/20

Abstract: A method for inhibiting water permeation in an extraction well of a hydrocarbon fluid from an underground reservoir containing: supplying a water-in-oil emulsion 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. The present invention also concerns a treatment fluid for hydrocarbon fluid extraction wells containing the aforementioned water-in-oil emulsion and the related preparation process.

公开(公告)号：US20180134887A1

公开(公告)日：2018-05-17

申请号：US15565813

申请日：2016-04-13

Applicant: ENI S.p.A.

Inventor： Lucilla DEL GAUDIO ,  Roberto LOREFICE ,  Massimo Silvio MORBIDELLI ,  Davide MOSCATELLI

IPC: C08L33/02 ,  C09K8/502 ,  C08F220/06 ,  E21B43/16

CPC classification number: C08L33/02 ,  C08F220/06 ,  C08F220/56 ,  C08F2220/286 ,  C08F2800/20 ,  C08L33/06 ,  C08L33/26 ,  C08L2201/52 ,  C08L2201/56 ,  C09K8/502 ,  C09K2208/10 ,  E21B43/00 ,  E21B43/16

Abstract: 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.

公开(公告)号：US20230392064A1

公开(公告)日：2023-12-07

申请号：US18250045

申请日：2021-10-21

Applicant: ENI S.P.A.

Inventor： Giuseppe MADDINELLI ,  Stefano CARMINATI ,  Davide MOSCATELLI ,  Matteo MARALDI

IPC: C09K8/035 ,  C08F220/38

CPC classification number: C09K8/035 ,  C08F220/387

Abstract: A new class of multifunctional tracers has been synthesised for use in the oil industry, specifically during waterflooding operations. They are used either in a traditional way (i.e., mapping the connections of oilfield selections) or to provide information on important physical-chemical parameters (such as oil content, temperature and rock permeability) useful for optimizing the oilfield management and subsequent improvement/increase in oil extraction. The multifunctional tracers have a polymer chain having a plurality of units different from one another and recurring along the chain and having respective specific functionalities. The units have at least a first rock-repulsive unit, which is configured to provide an effect of electrostatic repulsion towards rock, and at least a second detectable unit, which is configured to allow detectability of the tracer; and optionally at least a third unit, which is configured to detect a parameter or features of an oilfield, in particular oil saturation and temperature.

公开(公告)号：US20210253935A1

公开(公告)日：2021-08-19

申请号：US17246746

申请日：2021-05-03

Applicant: ENI S.P.A.

Inventor： Lucilla DEL GAUDIO ,  Davide MOSCATELLI ,  Paola ALBONICO

IPC: C09K8/512 ,  C08F220/28 ,  C08F220/06 ,  C09K8/58 ,  E21B33/138

Abstract: 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: 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.