DUAL-PHASE ACID-BASED FRACTURING COMPOSITION WITH CORROSION INHIBITORS AND METHOD OF USE THEREOF

摘要

A dual-phase acid-based fracturing composition with corrosion inhibitors and method for use in acid-based matrix and fracturing operations in oil and gas wells is provided. The composition includes an acid, a hydrocarbon, a hydrocarbon-soluble corrosion inhibitor, an acid-soluble corrosion inhibitor, and an acid-soluble inhibitor aid.

主权项

1. A method for inhibiting acid corrosion in matrix acidizing and acid fracturing applications in oil and gas wells, the method comprising the steps of:
preparing an emulsion comprising a hydrocarbon, an acid, and a first and second corrosion inhibitor, such that the first and second corrosion inhibitors are in separate phases of the emulsion; injecting the composition into an oil and gas well to cause fracturing and/or etching in the formation rock; and wherein the corrosion inhibitor present in the hydrocarbon phase will be spent during the injection of stimulation fluids and the corrosion inhibitor present in the acid phase will be spent during the flowback.