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AssigneeHoechst Aktiengesellschaft
InventorsGunter Pusch, Mohammad Ranjbar
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The present invention relates to a method for reducing or completely stopping the influxes of water of a deposit in at least a portion of a borehole for the extraction of oil and/or hydrocarbon gas, which traverses a deposit, a solution of a polymer being introduced, starting from the borehole, into that portion of the deposit in which the influxes of water are to be reduced or stopped, and the bore 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 polymer and the oil and/or hydrocarbon gas flowing through said portion of the deposit and reaching the borehole, wherein the non-aqueous solution of a hydrophobic, water-insoluble polymer is introduced into the deposit and the polymer precipitates in the presence of the connate water of the deposit.
A method for reducing or completely stopping the water inflows of a deposit in at least a portion of a borehole for the extraction of oil and/or hydrocarbon gas, which borehole traverses a deposit, a solution of a polymer 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 bore 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 polymer and the oil and/or hydrocarbon gas flowing through said portion of the deposit and reaching the borehole, wherein the non-aqueous solution of a hydrophobic, water-insoluble polymer is introduced into the deposit and the polymer precipitates in the presence of the connate water of the deposit.
A process for reducing or completely stopping the water inflows of a deposit in at least a portion of a borehole for the extraction of oil and/or hydrocarbon gas comprising the use of hydrophobic, water-insoluble polymer, wherein highly viscous oil raffinates or diesel oil are used as displacement agent to adjust the connate water to a high or low value for controlling the precipitation of the hydrophobic, water-insoluble polymer.
Dependencies are inferred from the claim text.