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公开(公告)号：US10011757B2
公开(公告)日：2018-07-03
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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公开(公告)号：US09976072B2
公开(公告)日：2018-05-22
申请号：US14668147
申请日：2015-03-25
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
CPC classification number: C09K8/584 , C07C59/305 , C09K8/588 , E21B43/16
Abstract: The present disclosure generally relates to a multicarboxylate, such as an alkyl alkoxy dicarboxylate a method of making the multicarboxylate, and methods to use the multicarboxylate. A specific embodiment of the disclosure is a compound comprising 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. The composition has a variety of uses but in some embodiments may be used in enhanced oil recovery processes.
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公开(公告)号：US20150203740A1
公开(公告)日：2015-07-23
申请号：US14673425
申请日：2015-03-30
Applicant: Chevron U.S.A. Inc.
Inventor： Robert Shong , Varadarajan Dwarakanath , Sophany Thach , Gregory Winslow
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 comprising at least two different chain length primary alcohols and reacting the mixture of primary alcohols to produce a mixture of Guerbet alcohols. The mixture of Guerbet alcohols is then used to produce an additive composition comprising additives of different molecular weights.
Abstract translation: 在本公开的一个实施方案中，使用不同碳长度的醇的混合物作为Guerbet醇的主要原料。 具体地，实施方案涉及从伯醇的混合物合成混合的分子量添加剂的方法，包括：接收包含至少两种不同的链长伯醇的伯醇的混合物，并使伯醇的混合物反应以产生格尔伯特醇的混合物 。 然后将Guerbet醇的混合物用于制备包含不同分子量的添加剂的添加剂组合物。
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公开(公告)号：US09902895B2
公开(公告)日：2018-02-27
申请号：US14927091
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: An injection solution for injecting into a subterranean reservoir to enhance production and recovery of oil from the reservoir is disclosed. In one embodiment, the injection solution is prepared by mixing a sufficient amount of a pumpable, stable and substantially anhydrous polymer suspension in an aqueous fluid for the polymer to be hydrated in less than or equal to 4 hours, resulting in the injection solution containing a polymer concentration ranging from 100 ppm to 50,000 ppm. The injection solution has a filter ratio of less than or equal to 1.5 at 15 psi using a 1.2 μm filter. 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 from 20:80 to 80:20.
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公开(公告)号：US20170198202A1
公开(公告)日：2017-07-13
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
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. 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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Patent Agency Ranking
公开(公告)号：US20160122624A1
公开(公告)日：2016-05-05
申请号：US14927091
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
IPC: C09K8/588
Abstract: An injection solution for injecting into a subterranean reservoir to enhance production and recovery of oil from the reservoir is disclosed. In one embodiment, the injection solution is prepared by mixing a sufficient amount of a pumpable, stable and substantially anhydrous polymer suspension in an aqueous fluid for the polymer to be hydrated in less than or equal to 4 hours, resulting in the injection solution containing a polymer concentration ranging from 100 ppm to 50,000 ppm. The injection solution has a filter ratio of less than or equal to 1.5 at 15 psi using a 1.2 μm filter. 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 from 20:80 to 80:20.
Abstract translation: 公开了一种用于注入地下储层以提高从储层中产生和回收油的注入溶液。 在一个实施方案中，注射溶液是通过在少于或等于4小时内将足量的可泵送的，稳定的和基本上无水的聚合物悬浮液混合在水性流体中以供待水合的聚合物制备的，导致注射溶液含有 聚合物浓度范围为100ppm至50,000ppm。 注射溶液在15psi下使用1.2μm的过滤器具有小于或等于1.5的过滤器比例。 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的组 ：20。
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公开(公告)号：US20160122623A1
公开(公告)日：2016-05-05
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
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.
Abstract translation: 公开了一种制备用于增强从地层中产生油的聚合物悬浮液的方法。 在一个实施方案中，该方法包括将平均分子量为0.5至30百万道尔顿的粉末聚合物混合至具有大于或等于8的HLB的水溶性溶剂中小于或等于24小时。 水溶性溶剂选自重量比为20:80至80:20的基团。 聚合物悬浮液是稳定的，可泵送的并且基本上是无水的; 并且在小于或等于4小时内对于注射溶液进行水合，其含有聚合物浓度为100ppm至50,000ppm，并且使用1.2μm过滤器，在15psi下具有小于或等于1.5的过滤比，通过 将足够量的聚合物悬浮液混合在水性流体中。
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公开(公告)号：US20150275068A1
公开(公告)日：2015-10-01
申请号：US14668147
申请日：2015-03-25
Applicant: Chevron U.S.A. Inc.
Inventor： Robert George Shong , Varadarajan Dwarakanath , Gregory A. Winslow , Sophany Thach
IPC: C09K8/584 , E21B43/16 , C07C59/305
CPC classification number: C09K8/584 , C07C59/305 , C09K8/588 , E21B43/16
Abstract: The present disclosure generally relates to a multicarboxylate, such as an alkyl alkoxy dicarboxylate a method of making the multicarboxylate, and methods to use the multicarboxylate. A specific embodiment of the disclosure is a compound comprising 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. The composition has a variety of uses but in some embodiments may be used in enhanced oil recovery processes.
Abstract translation: 本公开内容通常涉及多羧酸盐，例如烷基烷氧基二羧酸盐，制备多羧酸盐的方法，以及使用多羧酸盐的方法。 本公开的具体实施方案是包含化学式：R 1 -R 2 -R 3的化合物，其中R 1包含具有7-150个碳原子的支链或非支链，饱和或不饱和的环状或非环状疏水性碳链; 连接R1和R2的氧原子; R2包含环氧乙烷，环氧丙烷，环氧丁烷或其组合的烷氧基化链; 并且R 3包含包含2-12个碳原子和2-5个-COOH或-COOM基团的支链或非支链烃链，其中M是一价，二价或三价阳离子。 该组合物具有各种用途，但在一些实施方案中可用于增强的油回收方法中。
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公开(公告)号：US11834606B2
公开(公告)日：2023-12-05
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
CPC classification number: C09K8/588 , C09K8/032 , E21B21/068 , E21B43/385 , C09K2208/26 , C09K2208/28
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：US11591893B2
公开(公告)日：2023-02-28
申请号：US17287734
申请日：2019-10-22
Applicant: CHEVRON U.S.A. INC.
Inventor： Sujeewa S. Palayangoda , Kerry Kennedy Spilker , Sumitra Subrahmanyan , Gayani W. Pinnawala , Sophany Thach , Gregory A. Winslow , Dennis Arun Alexis , Harold Charles Linnemeyer , Timothy P. Theriot , Les Leszek Jackowski , Francesca Cibotti
Abstract: Described herein are methods of treating fluid comprising hydrocarbons, water, and polymer being produced from a hydrocarbon-bearing formation are provided. The method can include 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 viscosity reducer is buffered at a pH of 7 or less (e.g., at a pH of from 2 to 7, such as at a pH of from 3.5 to 7, or at a pH of from 5 to 7). 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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