Method for enhancing the recovery factor of heavy oil by in-situ oil-water emulsion with high phase inversion point
US11536123B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2022 |
| Grant date | Dec 27, 2022 |
| Priority date | — |
| Expiry date | Mar 18, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/21
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention discloses a method for enhancing the recovery factor of heavy oil by in-situ oil-water emulsion with high phase inversion point, and the method is aimed at the development of heavy oil reservoir by water injection under the condition that the performance parameters of crude oil emulsion meet the following three specific requirements: (A) The viscosity of the crude oil is less than 6,000 mPa·s; (B) At the reservoir temperature, the phase inversion point of the crude oil emulsion is greater than or equal to 70%, and the emulsion viscosity corresponding to the phase inversion point is 2-6 times of the crude oil viscosity; (C) At the reservoir temperature, when the water cut is less than or equal to the phase inversion point, the flow rate ratio of crude oil emulsion to crude oil is 0.2 to 0.9.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.