Acid emulsifier technology for continuous mixed emulsified acid systems
AssigneeThe Lubrizol Corporation
InventorsKern L. Smith, Nicole Shimek, Nadia M. Mojica
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Abstract
In one embodiment, the present technology provides a surfactant composition comprising an imide compound in an optional solvent for use in a hydrocarbon base fluid to improve the emulsification of an acidizing agent in the hydrocarbon base fluid. In another embodiment, the present technology provides a method of employing an acidizing well-bore stimulation fluid containing the surfactant composition to stimulate a reservoir.
Claims26
An acidizing well-bore stimulation fluid comprising an oil external emulsion of
- i. a hydrocarbon base fluid,
- ii. an acidizing agent, and
- iii. a surfactant comprising
- 1. an imide compound that is the reaction product of
- a. a hydrocarbyl-substituted acylating agent, and
- b. a nitrogen containing compound having a nitrogen atom capable of reacting with said hydrocarbyl-substituted acylating agent comprising at least one of
- (A) a compound of formula
- (B) a compound of formula
- (C) mixtures of (A) or (B), and
- 2. a hydrocarbon solvent.
(canceled)
A method of emulsifying an acidizing agent in a hydrocarbon fluid, comprising the steps of:
- a. adding to the hydrocarbon fluid a surfactant comprising
- i. an imide compound that is the reaction product of
- 1. a hydrocarbyl-substituted acylating agent, and
- 2. a nitrogen containing compound having an oxygen or nitrogen atom capable of reacting with said hydrocarbyl-substituted acylating agent comprising at least one of
- (A) a compound of formula
- (B) a compound of formula
- (C) mixtures of (A) or (B), and
- ii. a hydrocarbon solvent;
- and
- b. adding an acidizing agent to the hydrocarbon fluid.
Dependencies are inferred from the claim text.