| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a water cutoff material having high water cutoff properties, long-term stability and self-sealability and excellent thermal stability and further a plastic water cutoff material having clayey plasticity, reversibly moldable, having excellent applicability and suppressing speed of hydration swelling during flooding and thereby having excellent holding properties of swelling functions and excellent shape stability after swelling. <P>SOLUTION: This plastic water cutoff material comprises a water-swellable clay mineral, a water-soluble polymer and a base oil component. <P>COPYRIGHT: (C)2003,JPO |
