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公开(公告)号：US20220372361A1
公开(公告)日：2022-11-24
申请号：US17771587
申请日：2020-10-30
发明人： Gayani W. PINNAWALA , Varadarajan DWARAKANATH , Andrew M. THOMAS , Curtis B. CAMPBELL , Andrew M. DAVIDSON , Ping WANG
摘要： The present disclosure is directed to surfactants (in particular olefin sulfonates), surfactant packages, compositions derived thereof, and uses thereof in hydrocarbon recovery. Methods of making olefin sulfonate surfactants are also described.
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公开(公告)号：US20220363979A1
公开(公告)日：2022-11-17
申请号：US17771984
申请日：2020-10-30
发明人： Andrew M. THOMAS , Curtis B. CAMPBELL , Gayani W. PINNAWALA , Varadarajan DWARAKANATH , Andrew M. DAVIDSON , Ping WANG
摘要： The present disclosure is directed to surfactants (in particular olefin sulfonates), surfactant packages, compositions derived thereof, and uses thereof in hydrocarbon recovery. Methods of making olefin sulfonate surfactants are also described.
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公开(公告)号：US20230097814A1
公开(公告)日：2023-03-30
申请号：US17795059
申请日：2021-01-25
发明人： Gayani W. PINNAWALA , Nabijan NIZAMIDIN , Varadarajan DWARAKANATH , Guo-Qing TANG , Aaron WILHELM , Scott P. WEST
摘要： Described herein are surfactant compositions for use in oil and gas operations. The surfactant compositions are stable under harsh conditions, including in formations that exhibit high salinity, high temperature, and/or high H2S concentration. Also provided are methods of using these compositions. Specifically an aqueous composition comprising: (i) a surfactant package, wherein the surfactant package comprises: (a) a surfactant comprising a branched, unbranched, saturated, or unsaturated C6-C32:80(0-65):PO(0-65):EO(0-100)-X having a concentration within the aqueous composition of from 0.05%-5% by weight, based on the total weight of the aqueous composition, wherein there is at least one BO, PO, or EO group, and wherein X comprises a sulfonate, a disulfonate, a carboxylate, a dicarboxylate, a sulfosuccinate, a disulfosuccinate, or hydrogen: and (b) olefin sulfonate and/or a disulfonate; and (ii) water.
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公开(公告)号：US20220389304A1
公开(公告)日：2022-12-08
申请号：US17770559
申请日：2020-10-30
发明人： Varadarajan DWARAKANATH , Gayani W. PINNAWALA , Andrew M. THOMAS , Curtis B. CAMPBELL , Andrew M. DAVIDSON , Ping WANG
摘要： The present disclosure is directed to surfactants (in particular olefin sulfonates), surfactant packages, compositions derived thereof, and uses thereof in hydrocarbon recovery. Methods of making olefin sulfonate surfactants are also described.
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公开(公告)号：US20210179930A1
公开(公告)日：2021-06-17
申请号：US17121333
申请日：2020-12-14
申请人： Chevron U.S.A. Inc.
发明人： Gayani W. PINNAWALA , Sujeewa S. PALAYANGODA , Varadarajan DWARAKANATH , Mohamad SALMAN , Mohsen S. TAGAVIFAR
摘要： Disclosed herein are methods and composition for breaking foam, emulsions, or any combination thereof.
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公开(公告)号：US20230183577A1
公开(公告)日：2023-06-15
申请号：US17920975
申请日：2021-04-26
申请人： CHEVRON U.S.A. INC.
摘要： The present disclosure is directed to polyanionic surfactants, surfactant mixtures, compositions derived thereof, and uses thereof in hydrocarbon recovery. Methods of making polyanionic surfactants are also described.
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公开(公告)号：US20230167353A1
公开(公告)日：2023-06-01
申请号：US17920974
申请日：2021-04-26
申请人： CHEVRON U.S.A. INC.
摘要： The present disclosure is directed to polyanionic surfactants, surfactant mixtures, compositions derived thereof, and uses thereof in hydrocarbon recovery. Methods of making polyanionic surfactants are also described.
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8.发明公开公开(公告)号：US20240279532A1
公开(公告)日：2024-08-22
申请号：US18469134
申请日：2023-09-18
申请人： CHEVRON U.S.A. INC.
发明人： Dustin L. WALKER , Gayani W. PINNAWALA , Nabijan NIZAMIDIN , Varadarajan DWARAKANATH , Guo-Qing TANG , Dustin J. LOWRY , Tetsuo Art INOUYE , Taimur MALIK
CPC分类号： 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
摘要： 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 non-ionic surfactant and optionally one or more secondary surfactants.
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公开(公告)号：US20240067865A1
公开(公告)日：2024-02-29
申请号：US18496600
申请日：2023-10-27
申请人： CHEVRON U.S.A. INC.
发明人： 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分类号： C09K8/588 , C09K8/032 , E21B21/068 , E21B43/385 , C09K2208/26 , C09K2208/28
摘要： 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：US20230323193A1
公开(公告)日：2023-10-12
申请号：US18160710
申请日：2023-01-27
申请人： CHEVRON U.S.A. INC.
发明人： 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
CPC分类号： C09K8/588 , E21B21/068 , C09K8/032 , E21B43/385 , C09K2208/26 , C09K2208/28
摘要： 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 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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