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公开(公告)号：US09605198B2
公开(公告)日：2017-03-28
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.
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公开(公告)号：US20170044424A1
公开(公告)日：2017-02-16
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.
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分子量添加剂的方法，其包括：接收具有大于两个不同链长伯醇的伯醇的混合物，并在单个反应器中使伯醇的混合物反应以产生 至少五种格尔伯特醇的混合物。 然后可将Guerbet醇的混合物用于制备包含不同分子量的添加剂或表面活性剂的添加剂或表面活性剂组合物。
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公开(公告)号：US12215276B2
公开(公告)日：2025-02-04
申请号：US18160710
申请日：2023-01-27
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 including hydrocarbons, water, and polymer being produced from a hydrocarbon-bearing formation. The methods 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. 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.
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Patent Agency Ranking
公开(公告)号：US20190079066A1
公开(公告)日：2019-03-14
申请号：US16128129
申请日：2018-09-11
Applicant: Chevron U.S.A. Inc.
Inventor： Soumyadeep Ghosh , Adwait Chawathe , Sophany Thach
Abstract: A method for predicting phase behavior includes determining a hydrophilic-lipophilic difference based on a ratio of salinity to optimum salinity in the microemulsion system. The method further includes determining a mean solubilization ratio as a direct function of the hydrophilic-lipophilic difference at a same state as an optimum solubilization. The method also includes predicting phase behavior based on the determined mean solubilization ratio. The method additionally includes injecting a surfactant into a reservoir according to the predicted phase behavior.
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公开(公告)号：US09909053B2
公开(公告)日：2018-03-06
申请号：US14927069
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: Embodiments of a polymer composition are disclosed for use in enhancing the production of oil from a formation. In one embodiment, the composition includes 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 the group of surfactants, glycol ethers, alcohols, co-solvents, and mixtures thereof, at a weight ratio of powder polymer to water soluble solvent ranging from 20:80 to 80:20. The polymer composition is substantially anhydrous. The polymer composition is hydrated in an aqueous fluid 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.
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公开(公告)号：US09896617B2
公开(公告)日：2018-02-20
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 , Sumitra Subrahmanyan
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.
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公开(公告)号：US09752071B2
公开(公告)日：2017-09-05
申请号：US14208685
申请日：2014-03-13
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 remediation of near-wellbore damage. A specific aspect is a composition comprising an olefin sulfonate, a sulfosuccinate, and a chemical selected from the group consisting of an alcohol alkoxylated sulfate, an alcohol alkoxylated carboxylate, or a combination thereof.
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公开(公告)号：US20160122622A1
公开(公告)日：2016-05-05
申请号：US14927069
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
IPC: C09K8/588
Abstract: Embodiments of a polymer composition are disclosed for use in enhancing the production of oil from a formation. In one embodiment, the composition includes 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 the group of surfactants, glycol ethers, alcohols, co-solvents, and mixtures thereof, at a weight ratio of powder polymer to water soluble solvent ranging from 20:80 to 80:20. The polymer composition is substantially anhydrous. The polymer composition is hydrated in an aqueous fluid 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.
Abstract translation: 公开了用于增强地层中油的生产的聚合物组合物的实施方案。 在一个实施方案中，组合物包括悬浮在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，并且选自表面活性剂，二醇醚，醇， 共溶剂及其混合物，粉末聚合物与水溶性溶剂的重量比为20:80至80:20。 聚合物组合物基本上是无水的。 聚合物组合物在含有聚合物浓度为100ppm至50,000ppm且在15psi下具有小于或等于1.5的过滤比的小于或等于4小时的水溶液注入溶液中，使用1.2 微米过滤器。
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