| abstract |
The invention discloses a combined catalytic viscosity reducer and an application thereof, belonging to the technical field of heavy oil exploitation. The combined catalytic viscosity reducer consists of four slugs; the catalyst slugs include 10-15% azacarbene iron, 15-30% tert-butyl hydroperoxide, 2-5% phosphoric acid, and 2 hydrogen donors ‑5% and emulsifier 0.5‑1%, and the rest are solvents; heat generating agents include NaNO 2 10‑30%, NH 4 Cl 8‑25%, acid initiators 3‑10%, and the rest are water; water-soluble viscosity reducer Including surfactant 0.2-0.5%, alkali 2-10%, and the rest is water. The present invention also includes the application of the above-mentioned combined catalytic viscosity reducer in degrading heavy oil. The combined catalytic viscosity reducer proposed by the invention can effectively reduce viscosity without injecting steam, and the viscosity reduction rate can be as high as 96.5%. |