Acidizing compositions for improved fluid performance
AssigneeHalliburton Energy Services, Inc.
InventorsAaron M. Beuterbaugh, Larry Steven Eoff
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Abstract
A method of stimulating a subterranean carbonate formation includes delivering a composition comprising a hydrophobically modified polymer, a phosphorylated alkyl amino polycarboxylic acid, and a base treatment acid into the subterranean formation; and contacting the subterranean carbonate formation with the composition to form conductive flowpaths in the subterranean carbonate formation. The method may further include producing hydrocarbons from the subterranean carbonate formation. A composition for stimulating a subterranean formation includes a hydrophobically modified polymer; a phosphorylated alkyl amino polycarboxylic acid; and a base treatment acid.
Claims20
A method of stimulating a subterranean carbonate formation, comprising:
- delivering a composition comprising a hydrophobically modified polymer solution, between 0.25 and 20 wt. % of a phosphorylated alkyl amino polycarboxylic acid, and between 1.0 and 30 wt. % of a base treatment acid into the subterranean carbonate formation;
- and
- interacting the composition with carbonate in the subterranean carbonate formation to form conductive flowpaths in the subterranean carbonate formation with a lower pore volume to breakthrough to improve stimulation performance compared to a composition with:
- (1) the same weight percent of the base treatment acid and no hydrophobically modified polymer and no phosphorylated alkyl amino polycarboxylic acid;
- (2) the same weight percent of the base treatment acid, the phosphorylated alkyl amino polycarboxylic acid, and no hydrophobically modified polymer;
- and (3) the same weight percent of the base treatment acid, a higher weight percent of the hydrophobically modified polymer, and no phosphorylated alkyl amino polycarboxylic acid.
A composition for stimulating a subterranean carbonate formation, comprising:
- a hydrophobically modified polymer solution;
- between 0.25 and 20 wt. % of a phosphorylated alkyl amino polycarboxylic acid;
- and
- between 1.0 and 30 wt. % of a base treatment acid.
A method of extracting hydrocarbons from a subterranean carbonate formation, comprising:
- delivering a composition comprising a hydrophobically modified polymer solution, between 0.25 and 20 wt. % of a phosphorylated alkyl amino polycarboxylic acid, and between 1.0 and 30 wt. % of a base treatment acid into the subterranean carbonate formation via a wellbore;
- interacting the composition with carbonate in the subterranean carbonate formation to form conductive flowpaths in the subterranean carbonate formation with a lower pore volume to breakthrough to improve stimulation performance compared to a composition with:
- (1) the same weight percent of the base treatment acid and no hydrophobically modified polymer and no phosphorylated alkyl amino polycarboxylic acid;
- (2) the same weight percent of the base treatment acid, the phosphorylated alkyl amino polycarboxylic acid, and no hydrophobically modified polymer;
- and (3) the same weight percent of the base treatment acid, a higher weight percent of the hydrophobically modified polymer, and no phosphorylated alkyl amino polycarboxylic acid;
- and
- producing hydrocarbons from the subterranean carbonate formation through the wellbore.
Dependencies are inferred from the claim text.