Preparation method for heavy oil thermal recovery nano-copper catalytic cracking viscosity reducer

Abstract

A preparation method for a heavy oil thermal recovery nano-copper catalytic cracking viscosity reducer, the steps involve dissolving a copper salt in deionized water and introducing high-purity nitrogen to expel oxygen from the liquid; subsequently, a reducing agent, an organic ether protective agent, an alkali solution, and a dispersant are sequentially added to ultimately obtain the product. The invention enables rapid catalytic cracking of carbon-sulfur, carbon-oxygen, carbon-nitrogen bonds and organic carbon ring long molecular chains in heavy oil asphaltenes and resins into small organic molecules, achieving irreversible modification and viscosity reduction; furthermore, the catalytic cracking viscosity reducer can be retained in the formation for repeated action without adversely affecting refining processes. The method features a simple process, mild reaction conditions, and short reaction time; the resulting product exhibits excellent performance, with nano-copper particles having a small particle size, uniform dispersion in solution without sedimentation, and resistance to oxidation in air, no waste is generated during the preparation process.