Polymer solutions for use in oil recovery containing a complexing agent for multivalentions
AssigneeTalres Development (N.A.) N.V.
InventorsGary W. Pace, Trevor J. Holding
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Abstract
A process for preparing a polymer solution for use in "polymer based" oil recovery comprises adding to water the polymer in the form of an aqueous solution, a dry particulate solid or a suspension in a non-aqueous liquid, and also adding a complexing agent for multivalent ions and, where the solution so formed does not already contain an alkali metal salt, subsequently incorporating therein an alkali metal salt. The polymer may be a substantially cell-free microbial polysaccharide gum, a polyacrylamide or a cellulose derivative.
Claims18
A process for preparing a polymer solution for use in "polymer based" oil recovery, which comprises, in the absence of surfactant, combining water, a polymer selected from the group consisting of polyacrylamide and cellulose derivative and a complexing agent for multivalent ions and, where the solution so formed does not already contain an alkali metal salt, incorporating therein an alkali metal salt.
A process for preparing a polymer solution for use in "polymer based" oil recovery, which comprises in absence of surfactant, combining, the polymer and a complexing agent for multivalent ions and then diluting the solution so formed with mixture of an alkali metal salt.
A surfactant-free suspension of xanthan gum in a non-aqueous liquid together with a complexing agent for multivalent ions.
A surfactant-free particulate solid comprising a combination of a polymer for use in oil recovery with a complexing agent for mutivalent ions.
Dependencies are inferred from the claim text.