Gellable compositions containing:
(a) water;
(b) a water-soluble organic polymer bearing special chelating functional groups;
(c) a multi-valent metal ion capable of causing the polymer to crosslink,
are useful to recover oil from a oil field.
Said compositions make it possible gels to be obtained which are endowed with improved physical properties and show a higher stability under the conditions prevailing in the oil field.
可凝胶化的组合物,含有
(a)
水
(b) 含有特殊螯合官能团的
水溶性有机聚合物;
(c) 能使聚合物交联的多价
金属离子、
可用于油田采油。
通过上述组合物可以获得凝胶,这种凝胶具有更好的物理性质,在油田普遍存在的条件下具有更高的稳定性。