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    • 80. 发明申请
    • SHALE HYDRATION INHIBITION AGENT AND METHOD OF USE
    • SHALE HYDRIC抑制剂及其使用方法
    • WO02038697A2
    • 2002-05-16
    • PCT/US2001/047311
    • 2001-11-13
    • C09K8/20C09K8/22C09K8/24C09K7/02
    • C09K8/22C09K8/206C09K8/24C09K2208/12Y10S507/905
    • A water-base drilling fluid for use in drilling wells through a formation containing a shale which swells in the presence of water. The drilling fluid preferably includes: an aqueous based continuous phase, a weight material, and a shale hydration inhibition agent having the formula: H2N - R - {OR'}x - Y, in which R and R' are alkylene groups having 1 to to 6 carbon atoms and x is a value from about 1 to about 25. The Y group should be an amine or alkoxy group, preferably a primary amine or a methoxy group. The shale hydration inhibition agent should be present in sufficient concentration to reduce the swelling of the shale. Also inclusive of the present invention is a method of reducing the swelling of shale clay encountered during the drilling of a subterranean well, the method comprising circulating in the well a water-base fluid formulated in accordance with the present invention.
    • 一种用于钻井的水基钻井液,通过含有在水存在下膨胀的页岩的地层。 钻井液优选包括:基于水的连续相,重量物质和具有下式的页岩水合抑制剂:H 2 N-R - (OR')x-Y,其中R和R'是具有1〜 至6个碳原子,x为约1至约25的值.Y基团应为胺或烷氧基,优选伯胺或甲氧基。 页岩水化抑制剂应以足够的浓度存在,以减少页岩的膨胀。 还包括本发明的是减少在钻井期间遇到的页岩粘土膨胀的方法,所述方法包括在井中循环按照本发明配制的水基流体。