| 摘要 |
<p>Novel gel-based compositions used in reducing water inrush in oil or gas-producing wells. The gel-based compositions consist of a solution of at least one hydrosoluble complex of a polyvalent metallic cation such as zirconium lactate capable of crosslinking a non-ionic polysaccharide such as scleroglucane, in a concentration of 2 to 10,000 parts per million parts, expressed by weight of metal dioxide. With a preferred concentration of 2 to 100 ppm, oil permeability is not substantially affected. The compositions form aqueous scleroglucane gels for use in preventing water inrush in hydrocarbon producing wells.</p> |
