Cationic nitrogen-containing heterocycles and their application in wellbore stability

    公开(公告)号:US11427743B2

    公开(公告)日:2022-08-30

    申请号:US17004563

    申请日:2020-08-27

    IPC分类号: C09K8/528 C09K8/12 C08G73/06

    摘要: In accordance with one or more embodiments of the present disclosure, a method of inhibiting shale formation during water-based drilling of subterranean formations includes introducing a shale inhibitor to the subterranean formation during the water-based drilling, the shale inhibitor comprising a cationic polymer comprising repeating units of [A-B]. A is a substituted benzene or a substituted triazine of formula (2). B is a N-containing heterocycle. The cationic polymer and a method of making the cationic polymer are also described.