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    COMPOSITIONS AND METHODS FOR THE RECOVERY OF OIL UNDER HARSH CONDITIONS
    2.
    发明申请
    COMPOSITIONS AND METHODS FOR THE RECOVERY OF OIL UNDER HARSH CONDITIONS 有权

    公开(公告)号：US20230097814A1

    公开(公告)日：2023-03-30

    申请号：US17795059

    申请日：2021-01-25

    申请人： CHEVRON U.S.A. INC. ,  CHEVRON ORONITE COMPANY LLC

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

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

    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.