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发明授权
CN108728055B 页岩抑制剂及其制备方法和水基钻井液及页岩气钻井开采的方法 有权

页岩抑制剂及其制备方法和水基钻井液及页岩气钻井开采的方法
摘要：
本发明涉及钻井液用页岩抑制剂领域，公开了一种页岩抑制剂及其制备方法和水基钻井液及页岩气钻井开采的方法，其中，该页岩抑制剂含有式(I)所示的结构单元A、可选的式(II)所示的结构单元B和式(VIII)所示的结构单元C；其中，n为0‑3的整数；页岩抑制剂为端胺基超支化聚合物；结构单元A、结构单元B和结构单元C的个数的比为m：(m‑1)：(2m+2)，其中，m为1‑10的整数。采用该端胺基超支化聚合物抑制剂能够提高对页岩水化的抑制能力，进而提高钻井液整体的抑制性能；
摘要（英）：

The invention relates to the field of shale inhibitors for drilling fluids and discloses a shale inhibitor, a preparation method thereof, a water-based drilling fluid and a shale gas drilling production method. The shale inhibitor contains structural units A shown as formula (I) in the description, optionally structural units B shown as formula (II) in the description and structural units C shownas formula (VIII) in the description, wherein n is an integer of 0-3; the shale inhibitor is an amino-terminated hyperbranched polymer, and the ratio of quantities of the structural units A, the structural units B and the structural units C is m:(m-1):(2m+2), and m is an integer of 1-10. Inhibition capacity of the amino-terminated hyperbranched polymer inhibitor for shale hydration can be improved, and overall inhibition performance of the drilling fluid is further improved.

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