Method for identifying residual oil characteristics of porous reservoir rock
US5284051A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 1993 |
| Grant date | Feb 8, 1994 |
| Priority date | — |
| Expiry date | Feb 9, 2013 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B49/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A first fluid having a dyed styrene monomer is injected into a porous reservoir rock to effect saturation. A second fluid, miscible with the first fluid and having a dyed styrene monomer differing in color from the first fluid, is injected into the porous rock to displace the first fluid. Effluent flow from the porous rock is monitored with UV-visible light spectroscopy for use in determining oil displacement characteristics of the porous rock. Subsequent rapid polymerization of the styrene monomer within the porous rock allows identification and characterization of the controlling factors and attributes of the pore network responsible for entrapment of the residual phase. This allows assessment of larger intervals of the reservoir rock.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.