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US 4,064,940 AGranted
Water control with polymers
AssigneeContinental Oil Company
InventorDerry D. Sparlin
Life of this patent
Estimating the term…
Abstract
A method is provided for reducing the water permeability of a porous subterranean formation by injecting a dispersion of polyamide and a water soluble polymer through a well bore into the formation. Preferred materials are polyamides and poly-acrylamides.
Claims6
An improved method of treating a subterranean formation for reducing the flow of aqueous liquids therethrough by injecting a solution of polymer into said formation through a well bore, the improvement comprising injecting a dispersion of
- a. a thermoplastic or thermosetting cross-linked or non-cross-linked water-insoluble polyamide having recurring amide groups as an integral part of the main polymer chain, together with
- b. an aqueous solution of a water-soluble polymer, wherein
- c. the water-insoluble polyamide is dispersed in water in a concentration of from about 10 parts per million (ppm) to 30% by weight and the water soluble polymer in the aqueous solution is in a concentration of from about 100 ppm to about 5,000 ppm based on the total solution.
Dependencies are inferred from the claim text.