公开(公告)号：US12286588B2

公开(公告)日：2025-04-29

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 ,  C09K8/68 ,  C09K23/12

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：US12275893B2

公开(公告)日：2025-04-15

申请号：US18437915

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

IPC: C09K8/588 ,  C09K8/584 ,  E21B43/20

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.

公开(公告)号：US20240271031A1

公开(公告)日：2024-08-15

申请号：US18437942

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

IPC: C09K8/588 ,  C09K8/584 ,  E21B43/20

CPC classification number: C09K8/588 ,  C09K8/584 ,  E21B43/20

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.

公开(公告)号：US12012549B2

公开(公告)日：2024-06-18

申请号：US17770559

申请日：2020-10-30

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

Inventor： Varadarajan Dwarakanath ,  Gayani W. Pinnawala ,  Andrew M. Thomas ,  Curtis B. Campbell ,  Andrew M. Davidson ,  Ping Wang

IPC: C09K8/68 ,  C09K8/60 ,  C09K8/70

CPC classification number: C09K8/68 ,  C09K8/604 ,  C09K8/703

Abstract: 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.

公开(公告)号：US12012547B2

公开(公告)日：2024-06-18

申请号：US17771587

申请日：2020-10-30

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

Inventor： Gayani W. Pinnawala ,  Varadarajan Dwarakanath ,  Andrew M. Thomas ,  Curtis B. Campbell ,  Andrew M. Davidson ,  Ping Wang

IPC: C09K8/528 ,  C09K8/584 ,  C09K8/60 ,  C09K8/70

CPC classification number: C09K8/528 ,  C09K8/584 ,  C09K8/602 ,  C09K8/703

Abstract: 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.

公开(公告)号：US20240174914A1

公开(公告)日：2024-05-30

申请号：US18336457

申请日：2023-06-16

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

IPC: C09K8/588 ,  C09K8/584 ,  E21B43/20

CPC classification number: C09K8/588 ,  C09K8/584 ,  E21B43/20

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.

公开(公告)号：US11884879B2

公开(公告)日：2024-01-30

申请号：US17670988

申请日：2022-02-14

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: C09K8/52 ,  C09K8/584 ,  C09K8/588 ,  C09K8/68 ,  F17D1/16 ,  C09K8/88 ,  E21B43/26 ,  C08L33/26 ,  C09K8/60 ,  C08K5/09 ,  C08K5/37

CPC classification number: C09K8/584 ,  C08L33/26 ,  C09K8/52 ,  C09K8/588 ,  C09K8/602 ,  C09K8/68 ,  C09K8/88 ,  E21B43/26 ,  F17D1/16 ,  C08K5/09 ,  C08K5/37 ,  C09K2208/28

Abstract: Disclosed are compositions and methods for use in oil and gas operations.

公开(公告)号：US11753582B2

公开(公告)日：2023-09-12

申请号：US16635733

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

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

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: Described herein are compositions and methods that stabilize an 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 an anionic surfactant including a hydrophobic tail comprising from 6 to 60 carbon atoms and optionally one or more secondary surfactants.

公开(公告)号：US11739254B2

公开(公告)日：2023-08-29

申请号：US17321993

申请日：2021-05-17

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: E21B43/26 ,  C09K8/584 ,  C09K8/588 ,  C09K8/68 ,  F17D1/16 ,  C09K8/88 ,  C09K8/52 ,  C08L33/26 ,  C09K8/60 ,  C08K5/09 ,  C08K5/37

CPC classification number: C09K8/584 ,  C08L33/26 ,  C09K8/52 ,  C09K8/588 ,  C09K8/602 ,  C09K8/68 ,  C09K8/88 ,  E21B43/26 ,  F17D1/16 ,  C08K5/09 ,  C08K5/37 ,  C09K2208/28

Abstract: Disclosed are compositions and methods for use in oil and gas operations.

公开(公告)号：US11377586B2

公开(公告)日：2022-07-05

申请号：US16528183

申请日：2019-07-31

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

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.