Methods of reducing subterranean formation water permeability
AssigneeHalliburton Energy Services, Inc.
InventorsLarry S. Eoff, B. Raghava Reddy, Eldon D. Dalrymple
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Abstract
Improved methods of treating water and hydrocarbon producing subterranean formations to reduce the water permeability thereof are provided. The methods basically comprise introducing into the formation a water flow resisting chemical which attaches to adsorption sites on surfaces within the porosity of the formation and reduces the water permeability thereof without substantially reducing the hydrocarbon permeability thereof. The water flow resisting chemical is comprised of a polymer of at least one hydrophilic monomer and at least one hydrophobically modified hydrophilic monomer.
Claims25
An improved method of treating a water and hydrocarbon producing subterranean formation to reduce the water permeability thereof comprising introducing into said formation a water flow resisting chemical comprised of a polymer of at least one hydrophilic monomer and at least one hydrophobically modified hydrophilic monomer which attaches to adsorption sites on surfaces within the porosity of said formation and reduces the water permeability thereof without substantially reducing the hydrocarbon permeability.
An improved method of treating a water and hydrocarbon producing subterranean formation to reduce the water permeability thereof without substantially reducing the hydrocarbon permeability thereof comprising the steps of:
- (a) preparing a polymer of at least one hydrophilic monomer and at least one hydrophobically modified hydrophilic monomer having a molecular weight in the range of from about 100,000 to about 10,000,000;
- and
- (b) introducing said polymer into said formation so that said polymer attaches to adsorption sites on surfaces within the porosity of said formation.
Dependencies are inferred from the claim text.