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公开(公告)号：US10436693B2
公开(公告)日：2019-10-08
申请号：US15661914
申请日：2017-07-27
Applicant: Chevron U.S.A. Inc.
Inventor： Varadarajan Dwarakanath , Dustin L. Walker , David R. Espinosa , Dennis A. Alexis , Harold C. Linnemeyer , Marlon Solano
Abstract: Provided herein are portable apparatus as well as methods of analyzing an injection fluid using these portable apparatus. In some embodiments, the injection fluid can contain a polymer, but a polymer is not necessary. For example, the portable apparatus and methods may be used to determine viscosity, long term injectivity, filter ratio, or any combination thereof of the injection fluid.
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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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Patent Agency Ranking
公开(公告)号：US12247162B2
公开(公告)日：2025-03-11
申请号：US18437986
申请日：2024-02-09
Applicant: CHEVRON U.S.A. INC.
Inventor： Do Hoon Kim , Dennis Arun Alexis , Varadarajan Dwarakanath , David Espinosa , Taimur Malik , Logan Jackson , Tom Lynch , Ronald Robinson , Frances Fournier , Hong Yang , Sukhjit Aujla
Abstract: Provided herein are liquid polymer (LP) compositions comprising a synthetic (co)polymer (e.g., an acrylamide (co)polymer), as well as methods for preparing inverted polymer solutions by inverting these LP compositions in an aqueous fluid. The resulting inverted polymer solutions can have a concentration of a synthetic (co)polymer (e.g., an acrylamide (co)polymer) of from 50 to 15,000 ppm, and a filter ratio of 1.5 or less at 15 psi using a 1.2 μm filter. Also provided are methods of using these inverted polymer solutions in oil and gas operations, including enhanced oil recovery.
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公开(公告)号：US20240182779A1
公开(公告)日：2024-06-06
申请号：US18437986
申请日：2024-02-09
Applicant: CHEVRON U.S.A. INC.
Inventor： Do Hoon Kim , Dennis Arun Alexis , Varadarajan Dwarakanath , David Espinosa , Taimur Malik , Logan Jackson , Tom Lynch , Ronald Robinson , Frances Fournier , Hong Yang , Sukhjit Aujla
Abstract: Provided herein are liquid polymer (LP) compositions comprising a synthetic (co)polymer (e.g., an acrylamide (co)polymer), as well as methods for preparing inverted polymer solutions by inverting these LP compositions in an aqueous fluid. The resulting inverted polymer solutions can have a concentration of a synthetic (co)polymer (e.g., an acrylamide (co)polymer) of from 50 to 15,000 ppm, and a filter ratio of 1.5 or less at 15 psi using a 1.2 μm filter. Also provided are methods of using these inverted polymer solutions in oil and gas operations, including enhanced oil recovery.
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公开(公告)号：US11834609B2
公开(公告)日：2023-12-05
申请号：US16635906
申请日：2018-07-31
Applicant: CHEVRON U.S.A. INC.
Inventor： Dustin L. Walker , Gayani W. Pinnawala , Nabijan Nizamidin , Varadarajan Dwarakanath , Guo-Qing Tang , Dustin J. Lowry , Tetsuo Art Inouye , Taimur Malik
CPC classification number: C09K8/604 , C09K8/602 , C09K8/68 , C09K8/74 , C09K8/80 , C09K8/86 , E21B43/267 , E21B43/27 , E21B47/11 , C09K2208/10 , C09K2208/12 , C09K2208/26 , C09K2208/28 , C09K2208/32
Abstract: Embodiments of the disclosure include compositions and methods that stabilize a injection fluid when exposed to reservoir conditions, reducing formation damage and increasing the amount of hydrocarbon recovered. Specifically, the formulation is a single-phase liquid surfactant package which comprises a surfactant and optionally one or more secondary surfactants. Also provided are methods of using the stabilized injection fluids in stimulation operations.
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公开(公告)号：US11787998B2
公开(公告)日：2023-10-17
申请号：US17853283
申请日：2022-06-29
Applicant: Chevron U.S.A. Inc.
Inventor： Nabijan Nizamidin , Gayani W. Pinnawala , Guo-Qing Tang , Varadarajan Dwarakanath , Gregory A. Winslow , Jordan Taylor Isbell , Taimur Malik
IPC: C09K8/584 , C09K8/588 , C09K8/60 , C09K8/66 , C09K8/68 , C09K8/80 , E21B43/20 , E21B43/26 , E21B47/11
CPC classification number: C09K8/584 , C09K8/588 , C09K8/602 , C09K8/665 , C09K8/68 , C09K8/80 , E21B43/20 , E21B43/26 , E21B47/11
Abstract: Provided herein are compositions comprising borate-acid buffers, as well as methods of using these compositions in oil and gas operations, including enhanced oil recovery (EOR) operations, fracturing operations, stimulation operations, etc.
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公开(公告)号：US11248160B2
公开(公告)日：2022-02-15
申请号：US16262211
申请日：2019-01-30
Applicant: Chevron U.S.A. Inc. , Chevron Oronite Company LLC
Inventor： Dennis A. Alexis , Gayani Pinnawala Arachchilage , Varadarajan Dwarakanath , Do Hoon Kim , Taimur Malik , Gregory A. Winslow , Aaron Wilhelm
IPC: C09K8/584 , C09K8/588 , C09K8/68 , F17D1/16 , C09K8/88 , C09K8/52 , E21B43/26 , C08L33/26 , C09K8/60 , C08K5/09 , C08K5/37
Abstract: Disclosed are compositions and methods for use in oil and gas operations.
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