TECHNOLOGY USING ACIDIFYING EMULSIFYING AGENT FOR CONTINUOUSLY MIXED EMULSIFIABLE ACID SYSTEMS Russian patent published in 2020 - IPC C09K8/74 E21B43/27 

FIELD: drilling of wells.

SUBSTANCE: group of inventions relates to acidifying fluids for stimulation of wells. Acidifying fluid for stimulation of wells contains an emulsion with an oil external phase from a hydrocarbon basic fluid, an acidifying agent and a surface-active agent. Surface-active agent contains imide compound and hydrocarbon solvent. Imide compound is a reaction product between a hydrocarbyl-substituted acylating agent and a nitrogen-containing compound, in which there is a nitrogen atom capable of reacting with said hydrocarbyl-substituted acylating agent. Said nitrogen-containing compound contains at least one of the following compounds: compound described by formula , compound described by formula , mixtures thereof. Method for emulsification of an acidifying agent in a hydrocarbon fluid involves addition to said hydrocarbon fluid of said surface-active agent, addition of an acidifying agent to a hydrocarbon fluid.

EFFECT: technical result is a continuous or downstream method of producing an acidifying fluid and, as a result, higher efficiency of acidifying fluid operation in field conditions and harm reduction for environment associated with periodic mixing process.

25 cl