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    DUAL-PURPOSE SACRIFICIAL ANTI-SWELLING AGENT, PREPARATION METHOD AND APPLICATION THEREOF
    2.
    发明申请
    DUAL-PURPOSE SACRIFICIAL ANTI-SWELLING AGENT, PREPARATION METHOD AND APPLICATION THEREOF 有权

    公开(公告)号：US20250136858A1

    公开(公告)日：2025-05-01

    申请号：US19004499

    申请日：2024-12-30

    Applicant: China University of Petroleum ,  China shi da Education Development Co., Ltd.

    Inventor： Binglin Li ,  Yuliang Su ,  Binfei Li ,  Chao Zhang ,  Qichao Lv

    IPC: C09K8/575

    Abstract: A dual-purpose sacrificial anti-swelling agent, and a preparation method and application thereof are provided and relate to the technical field of oil reservoir exploitation. The dual-purpose sacrificial anti-swelling agent is quaternized lignin, a phenolic hydroxyl group of quaternized lignin is linked with two quaternary ammonium nitrogen atoms that are located at para positions of the same six-membered ring. Raw materials used in the present disclosure are prepared from papermaking waste liquid and a by-product of flue gas desulfurization and denitrification, which not only reduces the cost, but also transforms waste materials into valuable resources. The present disclosure increases the adsorption capacity of quaternized lignin in the formation by quaternizing lignin, and enables quaternized lignin to acts as both a sacrificial agent and an anti-swelling agent through competitive adsorption, achieving multiple purposes by using one agent.

    Composite nitrogen huff and puff method for bounded fault block reservoir
    4.
    发明授权
    Composite nitrogen huff and puff method for bounded fault block reservoir 有权

    公开(公告)号：US11187065B2

    公开(公告)日：2021-11-30

    申请号：US16472827

    申请日：2019-01-15

    Applicant: CHINA UNIVERSITY OF PETROLEUM

    Inventor： Teng Lu ,  Zhaomin Li ,  Jian Li ,  Dingyong Zhang ,  Dawei Hou ,  Binfei Li

    IPC: E21B43/16

    Abstract: A composite nitrogen huff and puff method for a bounded fault block reservoir comprises: selecting the reservoir to be developed, wherein the reservoir to which the development method is applicable is roughly screened according to the following conditions: the reservoir is a bounded fault block reservoir, buried depth 0.5, reservoir thickness>10 m, horizontal permeability>100 mD, vertical permeability to horizontal permeability ratio>0.35, reservoir porosity>0.20, and stratigraphic dip>8°; and sequentially performing the following huff and puff phases: a nitrogen huff and puff phase, a nitrogen and water composite huff and puff phase, a nitrogen and foaming agent composite huff and puff phase, and a nitrogen and carbon dioxide composite huff and puff phase.

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