RECYCLABLE CLEAN FRACTURING FLUID THICKENING AGENT, PREPARATION METHOD FOR SAME, RECYCLING METHOD THEREFORE, AND HIGH TEMPERATURE-RESISTANT CLEAN FRACTURING FLUID

摘要

The present invention relates to the field of oil and gas field production increase transformations. Disclosed is a recyclable clean fracturing fluid thickening agent, a preparation method for same, a recycling method therefor, and a high temperature-resistant clean fracturing fluid. The present invention acquires an intermediate via a reaction with diethanolamine and dichlorosulfoxide serving as raw materials, then has the intermediate reacting with an unsaturated fatty acid amidopropyldimethyl tertiary amine to produce the recyclable clean fracturing fluid thickening agent. The entire preparation process of the present invention is simple, the clean fracturing fluid prepared thereby retains excellent viscoelasticity at 160 °C or less and is applicable in a fracturing fluid production increase transformation of a medium-to-low permeability reservoir. The recyclable clean fracturing fluid thickening agent, serving as a fracturing fluid thickening agent, can be recycled from a gel breaking fluid by means of a phase separation method, attains a recovery rate of up to 100%, is green and clean, and favors environmental protection.