METHODS FOR TREATING A SUBTERRANEAN WELL

摘要

Fluid compositions comprising water, an acid or an acid source, a chelating agent and a relative permeability modifier have utility in the context of matrix acidizing of oil bearing sandstone formations. Acidizing treatments with these compositions may improve the formation permeability to oil with respect to the permeability to water. The relative permeability modifier is a cationic polyacrylamide.

主权项

1. A composition, comprising water, an acid or an acid source, a chelating agent and a relative permeability modifier, wherein the relative permeability modifier comprises at least one cationic polyacrylamide.