Water-based viscosity reducer for emulsifying ultra-heavy oil and preparation method thereof
US11268012B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | May 2, 2018 |
| Grant date | Mar 8, 2022 |
| Priority date | — |
| Expiry date | Nov 19, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/28
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A water-based viscosity reducer for emulsifying ultra-heavy oil and a preparation method thereof is provided, where the viscosity reducer includes the following components (based on 100 parts by weight): 0.7 to 4 parts of surfactant, 0 to 10 parts of oil phase, and the balance being a water phase; and the preparation method thereof is stirring the surfactant, the oil phase, and the water phase at room temperature for mixing evenly, to form the water-based viscosity reducer for emulsifying ultra-heavy oil. The invention greatly improves the overall surface activity by using the synergistic effect generated by the compounding of surfactants, and can significantly reduce oil-water interfacial tension. It is especially suitable for emulsifying viscosity reduction of alkali-sensitive stratum, has characteristics such as low cost, safety, and simple preparation, and can effectively enhance heavy oil recovery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.