| 摘要 |
The present invention relates to a method for reducing or completely stopping the water inflows from a deposit in at least a portion of a borehole for the extraction of oil and/or hydrocarbon gas, which borehole traverses a deposit, an aqueous solution of a copolymer being introduced, starting from the borehole, into that portion of the deposit in which the water inflows are to be reduced or stopped, and the borehole subsequently being put into service for the extraction of oil and/or hydrocarbon gas, the fluids present in the deposit coming into contact with said portion of the deposit containing the adsorbed copolymer, and the oil and/or hydrocarbon gas flowing through said portion of the deposit and reaching the borehole, while the passage of the deposit is reduced, wherein the aqueous solution contains a copolymer based on acrylamidoalkylenesulfonate, vinylacetamide and optionally further monomers.
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