A composition and a method of using the composition to adjust the
permeability of a subsurface formation is disclosed. The composition is a
water insoluble gel made by cross linking a water soluble polymer. The
water soluble polymer is made by polymerizing a precursor composition,
wherein the precursor composition is a mixture of an acrylic acid
compound and a reactant comprised of a divalent metal salt of the acrylic
acid compound.