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US 11,987,751 B2Granted
Treatment of subterranean formations
AssigneeInnospec Limited
InventorsIan Malcolm McRobbie, William Trenholme
Life of this patent
Estimating the term…
Abstract
A method of treating a subterranean formation by contacting the formation with the following: (a) ammonium compound; (b) an oxidizing agent selected from a perchlorate or a nitrite or combinations thereof; and (c) sulfamic acid.
Claims22
A method of treating a subterranean formation, the method comprising:
- (a) introducing an ammonium compound into the formation;
- (b) introducing an oxidizing agent into the formation, wherein said oxidizing agent is selected from a perchlorate and a nitrite or combinations thereof;
- (c) introducing sulfamic acid as a solution or slurry in water into the formation;
- and
- (d) contacting the formation with said ammonium compound, said oxidizing agent and said sulfamic acid;
- wherein said ammonium compound reacts with said oxidizing agent and/or said sulfamic acid to generate a gas in the formation;
- wherein said sulfamic acid reacts to produce a gas, wherein the gas produced includes nitrogen atoms originating in the sulfamic acid;
- and
- wherein a ratio (B) defined as the number of moles of ammonium compound divided by the total number of moles of sulfamic acid contacted with the formation is greater than 0 and is 10 or less.
6 more elements
A method of treating a subterranean formation, the method comprising:
- (a) introducing an ammonium compound into the formation;
- (b) introducing an oxidizing agent into the formation, wherein said oxidizing agent is selected from a perchlorate and a nitrite or combinations thereof;
- (c) introducing sulfamic acid as a solution or slurry in water into the formation;
- and
- (d) contacting the formation with said ammonium compound, said oxidizing agent and said sulfamic acid;
- wherein said ammonium compound reacts with said oxidizing agent and/or said sulfamic acid to generate a gas in the formation;
- wherein said sulfamic acid reacts to produce a gas, wherein the gas produced includes nitrogen atoms originating in the sulfamic acid;
- and
- wherein a ratio (H) defined as the number of moles of oxidizing agent divided by the total number of moles of sulfamic acid contacted with the formation is in the range 0.5-10.
6 more elements
A method of treating a subterranean formation, the method comprising:
- (a) introducing an ammonium compound into the formation;
- (b) introducing an oxidizing agent into the formation, wherein said oxidizing agent is selected from a perchlorate and a nitrite or combinations thereof;
- (c) introducing sulfamic acid as a solution or slurry in water into the formation;
- and
- (d) contacting the formation with said ammonium compound, said oxidizing agent and said sulfamic acid;
- wherein said ammonium compound reacts with said oxidizing agent and/or said sulfamic acid to generate a gas in the formation;
- wherein said sulfamic acid reacts to produce a gas, wherein the gas produced includes nitrogen atoms originating in the sulfamic acid;
- wherein a ratio (B) defined as the number of moles of ammonium compound divided by the total number of moles of sulfamic acid contacted with the formation is greater than 0 and is 10 or less;
- and
- wherein a ratio (H) defined as the number of moles of oxidizing agent divided by the total number of moles of sulfamic acid contacted with the formation is in the range 0.5-10.
7 more elements
Dependencies are inferred from the claim text.