Thermochemical fluid injection to prevent cool front invasion in CO

    公开(公告)号:US12006794B1

    公开(公告)日:2024-06-11

    申请号:US18180530

    申请日:2023-03-08

    CPC classification number: E21B36/008 C09K8/05 C09K8/594 F24T50/00

    Abstract: A method of enhancing heat transfer and energy efficiency in a geothermal reservoir includes injecting a carbonated fluid to the reservoir, injecting a first salt solution and a second salt solution into the reservoir, and increasing the temperature of the reservoir by reacting the first salt solution with the second salt solution to provide heat. The carbonated fluid injection decreases a temperature of the reservoir. The second salt solution is reactive with the first salt solution under the conditions in the reservoir after the injecting. A system of enhancing heat transfer and energy efficiency in a geothermal reservoir includes an injection system in fluid communication with an injection well. The injection system is configured to alternate the injection of the carbonated fluid and the first salt solution and second salt solution.

    Enhancing CO
    2.
    发明授权

    公开(公告)号:US12031413B2

    公开(公告)日:2024-07-09

    申请号:US17653181

    申请日:2022-03-02

    CPC classification number: E21B41/0064 B65G5/00 C01B32/50

    Abstract: A method for increasing CO2 sequestration efficiency in depleted reservoirs using a CO2 thickener is provided. The method may include the steps of introducing a thickened CO2 mixture into the depleted reservoir, where the thickened CO2 mixture comprises a mixture of CO2 and a CO2 thickener. The method may include using CO2 is in a liquid or supercritical state upon introduction into the depleted reservoir. The method may also include the step of using a CO2 thickener comprising a methyl acrylate-based copolymer, a CO2 solvent, and a solvent.

    A METHODOLOGY TO INCREASE OIL PRODUCTION RATES IN GRAVITY DRAINAGE CO2 GAS INJECTION PROCESSES

    公开(公告)号:US20230064753A1

    公开(公告)日:2023-03-02

    申请号:US17463005

    申请日:2021-08-31

    Abstract: A method for treating hydrocarbons in a reservoir is provided. The method includes the steps of introducing a foaming surfactant solution and a foaming gas into the upper portion of a reservoir such that barrier foam bubbles form. The method includes introducing super/critical carbon dioxide such that a CO2 cap forms. The CO2 cap forms above a foam barrier positioned at an interface between the hydrocarbons to be treated in the reservoir and the CO2 cap. The foam barrier comprises aggregated barrier foam bubbles. The super/critical carbon dioxide is introduced into the reservoir at an injection rate that is greater than a pre-treatment critical gas injection rate. Hydrocarbons are recovered from a lower portion of the reservoir. The barrier foam bubbles that form are comprised of a foaming gas that has diminished solubility in aqueous solutions as compared with other gases, such as carbon dioxide.

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