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    Chemical imbibition by gels containing surfactants for fractured carbonate reservoirs
    32.
    发明授权
    Chemical imbibition by gels containing surfactants for fractured carbonate reservoirs 有权

    公开(公告)号：US10927290B2

    公开(公告)日：2021-02-23

    申请号：US15267915

    申请日：2016-09-16

    Applicant: Saudi Arabian Oil Company

    Inventor： Ming Han ,  Jinxun Wang ,  Dongqing Cao ,  Abdullah Al-Boqmi ,  Amar J. Alshehri

    IPC: C09K8/588 ,  C09K8/50 ,  C09K8/584 ,  E21B43/20

    Abstract: An imbibition gel composition that induces spontaneous imbibition of a water phase into a reservoir matrix is provided. The imbibition gel composition including a surfactant, the surfactant operable to alter the wettability of a surface of a reservoir matrix from oil-wet toward water-wet and the surfactant further operable to diffuse through the water phase. The imbibition gel composition further including a gel system, the gel system operable to retain the surfactant and the gel system further operable to release the surfactant in the presence of the water phase, where altering the wettability of the surface of the reservoir matrix toward water-wet induces the spontaneous imbibition of the water phase into the reservoir matrix.

    SURFACTANT MIXTURE SOLUTIONS INCLUDING POLYACRYLAMIDE POLYMERS AND SURFACTANT MIXTURES USED FOR CHEMICAL ENHANCED OIL RECOVERY
    34.
    发明申请
    SURFACTANT MIXTURE SOLUTIONS INCLUDING POLYACRYLAMIDE POLYMERS AND SURFACTANT MIXTURES USED FOR CHEMICAL ENHANCED OIL RECOVERY 有权

    公开(公告)号：US20250011640A1

    公开(公告)日：2025-01-09

    申请号：US18753577

    申请日：2024-06-25

    Applicant: Saudi Arabian Oil Company

    Inventor： Limin Xu ,  Ming Han ,  Tianping Huang

    IPC: C09K8/584 ,  C08K5/06 ,  C08K5/19 ,  C08K5/41 ,  C09K8/588 ,  E21B43/16

    Abstract: A method for reducing the interfacial tension between a hydrocarbon fluid and a surfactant mixture solution during chemical enhanced oil recovery includes introducing a surfactant mixture solution to a hydrocarbon-bearing reservoir, thereby reducing the interfacial tension at a liquid-liquid interface of the hydrocarbon fluid and the surfactant mixture solution. The surfactant mixture solution includes a polyacrylamide polymer, a brine solution, and a surfactant mixture. The surfactant mixture includes an anionic surfactant, a cationic surfactant, and a nonionic surfactant. The anionic surfactant may include organosulfate. The cationic surfactant may include a quaternary ammonium, a brominated trimethylammonium, a chloride trimethylammonium, or combinations thereof. The nonionic surfactant may include a polyoxyethylene fatty acid ester, a phenylated ethoxylate, or combinations thereof.

    Restoring core samples
    37.
    发明授权
    Restoring core samples 有权

    公开(公告)号：US11906417B2

    公开(公告)日：2024-02-20

    申请号：US17569141

    申请日：2022-01-05

    Applicant: Saudi Arabian Oil Company

    Inventor： Ying Wang ,  Ming Han ,  Dongqing Cao ,  Jinxun Wang

    IPC: G01N15/08 ,  G01N33/24

    CPC classification number: G01N15/0826 ,  G01N15/08 ,  G01N15/082 ,  G01N15/0806 ,  G01N15/088

    Abstract: The systems and method described in this specification relate to at least partially restoring porosity and brine permeability of carbonate core samples. The systems and methods include extracting a carbonate core sample from a subterranean formation. The extracted carbonate core sample is inserted into a core flooding test machine. A first porosity and a first brine permeability of the extracted carbonate core sample is measured. A fluid is pumped through the extracted carbonate core sample to flood the carbonate core sample. The fluid includes at least one of a high-molecular weight polymer solution and a gel particle solution. The systems and methods include at least partially restoring the porosity and the brine permeability of the carbonate core sample by pumping an oxidizing solution through the flooded carbonate core sample and heating the carbonate core sample to a temperature of at least 60° C. after pumping the oxidizing solution through the carbonate core sample.

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