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    METHOD OF USING MULTICARBOXYLATE COMPOSITIONS IN ENHANCED OIL RECOVERY
    6.
    发明申请
    METHOD OF USING MULTICARBOXYLATE COMPOSITIONS IN ENHANCED OIL RECOVERY 审中-公开

    公开(公告)号：US20190153299A1

    公开(公告)日：2019-05-23

    申请号：US16259247

    申请日：2019-01-28

    申请人： Chevron U.S.A. Inc.

    发明人： Robert George SHONG ,  Varadarajan DWARAKANATH ,  Gregory A. WINSLOW ,  Sophany THACH

    IPC分类号： C09K8/584 ,  C09K8/588 ,  C07C59/305 ,  E21B43/16

    摘要： 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.

    PH CONTROL IN FLUID TREATMENT
    8.
    发明申请
    PH CONTROL IN FLUID TREATMENT 有权

    公开(公告)号：US20210395602A1

    公开(公告)日：2021-12-23

    申请号：US17287734

    申请日：2019-10-22

    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

    IPC分类号： C09K8/588 ,  E21B21/06 ,  E21B43/38

    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.