公开(公告)号：US20240279532A1

公开(公告)日：2024-08-22

申请号：US18469134

申请日：2023-09-18

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

IPC: C09K8/60 ,  C09K8/68 ,  C09K8/74 ,  C09K8/80 ,  C09K8/86 ,  E21B43/267 ,  E21B43/27 ,  E21B47/11

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 non-ionic surfactant and optionally one or more secondary surfactants.

公开(公告)号：US20190153299A1

公开(公告)日：2019-05-23

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 ,  C09K8/588 ,  C07C59/305 ,  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.

公开(公告)号：US20240384158A1

公开(公告)日：2024-11-21

申请号：US18581235

申请日：2024-02-19

Applicant: CHEVRON U.S.A. INC.

Inventor： Varadarajan DWARAKANATH ,  Taimur MALIK ,  Lin ZUO ,  Jimin Daniel ZHOU ,  Nabijan NIZAMIDIN ,  Gregory A. WINSLOW ,  Reza BANKI ,  Mohamad SALMAN

IPC: C09K8/60 ,  C09K8/94 ,  E21B43/16

Abstract: Disclosed are foam precursor compositions, foamed compositions, and methods of using these foamed compositions for the stimulation of unconventional reservoirs.

公开(公告)号：US20230183577A1

公开(公告)日：2023-06-15

申请号：US17920975

申请日：2021-04-26

Applicant: CHEVRON U.S.A. INC.

Inventor： Gayani W. PINNAWALA ,  Sujeewa S. PALAYANGODA ,  Gregory A. WINSLOW ,  Varadarajan DWARAKANATH

IPC: C09K23/02 ,  C09K23/12 ,  C09K8/584 ,  C09K8/68

CPC classification number: C09K23/02 ,  C09K23/12 ,  C09K8/584 ,  C09K8/68

Abstract: 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.

公开(公告)号：US20230167353A1

公开(公告)日：2023-06-01

申请号：US17920974

申请日：2021-04-26

Applicant: CHEVRON U.S.A. INC.

Inventor： Gayani W. PINNAWALA ,  Sujeewa S. PALAYANGODA ,  Gregory A. WINSLOW ,  Varadarajan DWARAKANATH

IPC: C09K8/584 ,  C09K8/60 ,  C09K23/12 ,  C09K8/68

CPC classification number: C09K8/584 ,  C09K8/602 ,  C09K23/12 ,  C09K8/68

Abstract: 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.

公开(公告)号：US20230097814A1

公开(公告)日：2023-03-30

申请号：US17795059

申请日：2021-01-25

Applicant: CHEVRON U.S.A. INC. ,  CHEVRON ORONITE COMPANY LLC

Inventor： Gayani W. PINNAWALA ,  Nabijan NIZAMIDIN ,  Varadarajan DWARAKANATH ,  Guo-Qing TANG ,  Aaron WILHELM ,  Scott P. WEST

IPC: C09K8/584 ,  C09K23/02 ,  C09K23/34 ,  C09K23/56

Abstract: 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.

公开(公告)号：US20200317993A1

公开(公告)日：2020-10-08

申请号：US16635906

申请日：2018-07-31

Applicant: CHEVRON U.S.A. INC.

Inventor： Dustin L. WALKER ,  Gayani PINNAWALA ARACHCHILAGE ,  Nabi NIZAMIDIN ,  Varadarajan DWARAKANATH ,  Guo-Qing TANG ,  Dustin J. LOWRY ,  Tetsuo Art INOUYE ,  Taimur MALIK

IPC: C09K8/60 ,  C09K8/86 ,  E21B47/11

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.

公开(公告)号：US20240327698A1

公开(公告)日：2024-10-03

申请号：US18496558

申请日：2023-10-27

Applicant: CHEVRON U.S.A. INC.

Inventor： Dustin L. WALKER ,  Gayani W. PINNAWALA ,  Nabijan NIZAMIDIN ,  Varadarajan DWARAKANATH ,  Guo-Qing TANG ,  Dustin J. LOWRY ,  Tetsuo A. INOUYE ,  Taimur MALIK

IPC: C09K8/60 ,  C09K8/68 ,  C09K8/74 ,  C09K8/80 ,  C09K8/86 ,  E21B43/267 ,  E21B43/27 ,  E21B47/11

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.

公开(公告)号：US20240182781A1

公开(公告)日：2024-06-06

申请号：US18439282

申请日：2024-02-12

Applicant: CHEVRON U.S.A. INC.

Inventor： Gayani W. PINNAWALA ,  Sujeewa S. PALAYANGODA ,  Varadarajan DWARAKANATH ,  Mohamad SALMAN ,  Mohsen S. TAGAVIFAR

IPC: C09K8/86 ,  C10G33/04

CPC classification number: C09K8/86 ,  C10G33/04 ,  C09K2208/26

Abstract: Disclosed herein are methods and composition for breaking foam, emulsions, or any combination thereof.

公开(公告)号：US20230183578A1

公开(公告)日：2023-06-15

申请号：US17920977

申请日：2021-04-26

Applicant: CHEVRON U.S.A. INC.

Inventor： Gayani W. PINNAWALA ,  Sujeewa S. PALAYANGODA ,  Gregory A. WINSLOW ,  Varadarajan DWARAKANATH ,  Kerry Kennedy SPILKER ,  Robert George SHONG

IPC: C09K23/02 ,  C09K23/12 ,  C09K8/584 ,  C09K8/68

CPC classification number: C09K23/02 ,  C09K23/12 ,  C09K8/584 ,  C09K8/68

Abstract: 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.