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公开(公告)号：US20220145157A1
公开(公告)日：2022-05-12
申请号：US17581392
申请日：2022-01-21
Applicant: CHEVRON U.S.A. INC.
Inventor： Sumitra Subrahmanyan , Gayani W. Pinnawala , Sophany Thach , Gregory A. Winslow , Dennis A. Alexis , Harold C. Linnemeyer , Timothy P. Theriot , Les Leszek Jackowski , Francesca Cibotti
IPC: C09K8/03
Abstract: Embodiments of treating fluid comprising hydrocarbons, water, and polymer being produced from a hydrocarbon-bearing formation are provided. One embodiment comprises adding a concentration of a viscosity reducer to the fluid to degrade the polymer present in the fluid and adding a concentration of a neutralizer to the fluid to neutralize the viscosity reducer in the fluid. The addition of the concentration of the viscosity reducer is in a sufficient quantity to allow for complete chemical degradation of the polymer prior to the addition of the concentration of the neutralizer in the fluid such that excess viscosity reducer is present in the fluid. The addition of the concentration of the neutralizer is sufficiently upstream of any surface fluid processing equipment to allow for complete neutralization of the excess viscosity reducer such that excess neutralizer is present in the fluid prior to the fluid reaching any of the surface fluid processing equipment.
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公开(公告)号：US11242739B2
公开(公告)日：2022-02-08
申请号：US16660497
申请日：2019-10-22
Applicant: Chevron U.S.A. Inc.
Inventor： Sumitra Subrahmanyan , Gayani W. Pinnawala , Sophany Thach , Gregory A. Winslow , Dennis Arun Alexis , Harold Charles Linnemeyer , Timothy Peter Theriot , Les Leszek Jackowski , Francesca Cibotti
Abstract: Embodiments of treating fluid comprising hydrocarbons, water, and polymer being produced from a hydrocarbon-bearing formation are provided. One embodiment comprises adding a concentration of a viscosity reducer to the fluid to degrade the polymer present in the fluid and adding a concentration of a neutralizer to the fluid to neutralize the viscosity reducer in the fluid. The addition of the concentration of the viscosity reducer is in a sufficient quantity to allow for complete chemical degradation of the polymer prior to the addition of the concentration of the neutralizer in the fluid such that excess viscosity reducer is present in the fluid. The addition of the concentration of the neutralizer is sufficiently upstream of any surface fluid processing equipment to allow for complete neutralization of the excess viscosity reducer such that excess neutralizer is present in the fluid prior to the fluid reaching any of the surface fluid processing equipment.
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公开(公告)号：US10233382B2
公开(公告)日：2019-03-19
申请号：US15471255
申请日：2017-03-28
Applicant: Chevron U.S.A. Inc.
Inventor： Robert George Shong , Varadarajan Dwarakanath , Gregory A. Winslow , Sophany Thach
IPC: C09K8/584 , E21B43/16 , C09K8/588 , C07C59/305
Abstract: The present disclosure relates to the use of a multicarboxylate, such as an alkyl alkoxy dicarboxylate, in enhanced oil recovery processes. A specific embodiment relates to the use of an aqueous stream including a compound having the chemical formula: R1—R2—R3, wherein R1 comprises a branched or unbranched, saturated or unsaturated, cyclic or non-cyclic, hydrophobic carbon chain having 7-150 carbon atoms; an oxygen atom linking R1 and R2; R2 comprises an alkoxylated chain comprising ethylene oxide, propylene oxide, butylene oxide, or a combination thereof; and R3 comprises a branched or unbranched hydrocarbon chain comprising 2-12 carbon atoms and 2-5 —COOH or —COOM groups wherein M is a monovalent, divalent, or trivalent cation.
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公开(公告)号：US09902894B2
公开(公告)日：2018-02-27
申请号：US14927084
申请日：2015-10-29
Applicant: Chevron U.S.A. Inc.
Inventor： Varadarajan Dwarakanath , Robert M. Dean , Do Hoon Kim , Dennis Arun Alexis , Sophany Thach , Taimur Malik , Anette Poulsen , Sumitra Subrahmanyan
Abstract: A method for making a polymer suspension for use in enhancing the production of oil from a formation is disclosed. In one embodiment, the method comprises mixing a powder polymer having an average molecular weight of 0.5 to 30 Million Daltons into a water soluble solvent having an HLB of greater than or equal to 8 for less than or equal to 24 hours. The water soluble solvent is selected from a group, at a weight ratio from 20:80 to 80:20. The polymer suspension is stable, pumpable, and substantially anhydrous; and it is hydrated for an injection solution in less than or equal to 4 hours, containing a polymer concentration ranging from 100 ppm to 50,000 ppm and having a filter ratio of less than or equal to 1.5 at 15 psi using a 1.2 μm filter, by mixing a sufficient amount of the polymer suspension in an aqueous fluid.
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公开(公告)号：US20170355896A1
公开(公告)日：2017-12-14
申请号：US15647922
申请日：2017-07-12
Applicant: Chevron U.S.A. Inc.
Inventor： Varadarajan Dwarakanath , Robert Matthew Dean , Will S. Slaughter , Dustin Luke Walker , Sophany Thach
Abstract: Aspects of the invention relate to compositions and methods that are used for the remediation of near-wellbore damage in regions of formations near injection wells in communication with subterranean reservoirs. The damage is caused by previous injection of a polymer emulsion into the injection well. A specific aspect is a method of injecting into the subterranean reservoir a composition containing an olefin sulfonate, a sulfosuccinate, and a chemical selected from an alcohol alkoxylated sulfate, an alcohol alkoxylated carboxylate, or a combination thereof. The polymer emulsion is thereby dissolved, cleaned and/or flushed away from the region near the injection well.
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Patent Agency Ranking
公开(公告)号：US20160122626A1
公开(公告)日：2016-05-05
申请号：US14927078
申请日：2015-10-29
Applicant: Chevron U.S.A. Inc.
Inventor： Varadarajan Dwarakanath , Robert M. Dean , Do Hoon Kim , Dennis Arun Alexis , Sophany Thach , Taimur Malik , Anette Poulsen
Abstract: A method of enhancing oil recovery in a subterranean reservoir is disclosed. In one embodiment, the method comprises providing a wellbore and a polymer suspension. The polymer suspension comprises a powder polymer having an average molecular weight of 0.5 to 30 Million Daltons suspended in a water soluble solvent having an HLB of greater than or equal to 8 and selected from a group, at a weight ratio of 20:80 to 80:20. The method comprises providing an aqueous fluid, mixing a sufficient amount of the polymer suspension in the aqueous fluid for the polymer to be hydrated resulting an injection solution in less than or equal to 4 hours, and injecting the injection solution into the wellbore. The injection solution contains a polymer concentration ranging from 100 ppm to 50,000 ppm and has a filter ratio of less than 1.5 at 15 psi using a 1.2 μm filter.
Abstract translation: 公开了一种提高地下储层中油回收率的方法。 在一个实施方案中，该方法包括提供井眼和聚合物悬浮液。 聚合物悬浮液包含悬浮在HLB大于或等于8的水溶性溶剂中的平均分子量为0.5至30百万道尔顿的粉末聚合物，并且选自重量比为20:80至80 ：20。 该方法包括提供水性流体，将足够量的聚合物悬浮液混合在水性流体中以供待水合的聚合物在少于或等于4小时内产生注射溶液，并将注入溶液注入井眼。 注射溶液的聚合物浓度范围为100ppm至50,000ppm，并且在15psi下使用1.2μm的过滤器具有小于1.5的过滤比。
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公开(公告)号：US12037542B2
公开(公告)日：2024-07-16
申请号：US17669043
申请日：2022-02-10
Applicant: CHEVRON U.S.A. INC.
Inventor： Robert George Shong , Varadarajab Dwarakanath , Gregory A. Winslow , Sophany Thach
IPC: C09K8/584 , C07C59/305 , C09K8/588 , E21B43/16
CPC classification number: C09K8/584 , C07C59/305 , C09K8/588 , E21B43/16
Abstract: The present disclosure relates to the use of a multicarboxylate, such as an alkyl alkoxy dicarboxylate, in enhanced oil recovery processes. Embodiments relate to an aqueous stream and the use thereof. The aqueous stream includes a compound having the chemical formula: R1—R2—R3, wherein R1 includes a branched or unbranched, saturated or unsaturated, cyclic or non-cyclic, hydrophobic carbon chain having an oxygen atom linking R1 and R2; R2 includes an alkoxylated chain comprising ethylene oxide, propylene oxide, butylene oxide, or a combination thereof; and R3 includes a branched or unbranched hydrocarbon chain and 2-5 —COOH or —COOM groups wherein M is a monovalent, divalent, or trivalent cation. R3 includes 2-12 carbon atoms.
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公开(公告)号：US20220162499A1
公开(公告)日：2022-05-26
申请号：US17669043
申请日：2022-02-10
Applicant: CHEVRON U.S.A. INC.
Inventor： Robert George Shong , Varadarajab Dwarakanath , Gregory A. Winslow , Sophany Thach
IPC: C09K8/584 , C07C59/305 , E21B43/16 , C09K8/588
Abstract: The present disclosure relates to the use of a multicarboxylate, such as an alkyl alkoxy dicarboxylate, in enhanced oil recovery processes. Embodiments relate to an aqueous stream and the use thereof. The aqueous stream includes a compound having the chemical formula: R1—R2—R3, wherein R1 includes a branched or unbranched, saturated or unsaturated, cyclic or non-cyclic, hydrophobic carbon chain having an oxygen atom linking R1 and R2; R2 includes an alkoxylated chain comprising ethylene oxide, propylene oxide, butylene oxide, or a combination thereof; and R3 includes a branched or unbranched hydrocarbon chain and 2-5 —COOH or —COOM groups wherein M is a monovalent, divalent, or trivalent cation. R3 includes 2-12 carbon atoms.
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公开(公告)号：US11248159B2
公开(公告)日：2022-02-15
申请号：US16259247
申请日：2019-01-28
Applicant: Chevron U.S.A. Inc.
Inventor： Robert George Shong , Varadarajan Dwarakanath , Gregory A. Winslow , Sophany Thach
IPC: C09K8/584 , C07C59/305 , E21B43/16 , C09K8/588
Abstract: The present disclosure relates to the use of a multicarboxylate, such as an alkyl alkoxy dicarboxylate, in enhanced oil recovery processes. Embodiments relate to an aqueous stream and the use thereof. The aqueous stream includes a compound having the chemical formula: R1-R2-R3, wherein R1 includes a branched or unbranched, saturated or unsaturated, cyclic or non-cyclic, hydrophobic carbon chain having an oxygen atom linking R1 and R2; R2 includes an alkoxylated chain comprising ethylene oxide, propylene oxide, butylene oxide, or a combination thereof; and R3 includes a branched or unbranched hydrocarbon chain and 2-5 —COOH or —COOM groups wherein M is a monovalent, divalent, or trivalent cation. R3 includes 2-12 carbon atoms.
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公开(公告)号：US09617464B2
公开(公告)日：2017-04-11
申请号：US15340747
申请日：2016-11-01
Applicant: Chevron U.S.A. Inc.
Inventor： Varadarajan Dwarakanath , Robert G. Shong , Gregory A. Winslow , Sophany Thach
Abstract: In an embodiment of the disclosure, mixtures of different carbon length alcohols are used as the primary feedstock for Guerbet alcohols. Specifically, embodiments relate to a method of synthesizing mixed molecular weight additives from a mixture of primary alcohols comprising, receiving a mixture of primary alcohols having greater than two different chain length primary alcohols and reacting the mixture of primary alcohols in a single reactor to produce a mixture of at least five Guerbet alcohols. The mixture of Guerbet alcohols can then be used to produce an additive or surfactant composition comprising additives or surfactants of different molecular weights.
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