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US 10,590,326 B1Granted
Storable gas generating compositions
AssigneeSaudi Arabian Oil Company
InventorB. Raghava Reddy
Life of this patent
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Abstract
The present application provides an aqueous fluid containing a gas-generating compound such as an azo compound, a hydrazide compound, or a semicarbazide compound. The aqueous fluid may also contain an amine compound, an oxidizer, or viscosifier, and a foaming surfactant. The aqueous composition may be storable at pH of less than about 5 without any appreciable gas generation, and may be activated to produce gas when mixed with a wellbore fluid for use in downhole applications.
Claims20
A method comprising:
- storing an aqueous composition comprising an azo compound of Formula (I):
- or a salt thereof, wherein:
- X1 and X2 are each independently selected from C1-6 alkyl, C2-6 alkenyl, C2-6 alkynyl, ORa1, and NRc1Rd1;
- each Ra1, Rc1, and Rd1 is independently selected from H, C1-6 alkyl, C2-6 alkenyl, C2-6 alkynyl, C3-7 cycloalkyl, and C6-10 aryl;
- and
- an acid to adjust the pH of the composition to be less than about 5;
- adding the aqueous composition to a wellbore fluid;
- and
- flowing a mixture of the aqueous composition and the wellbore fluid in a subterranean formation.
6 more elements
Dependencies are inferred from the claim text.