Tracking non-uniform flooding fronts of gas injection in oil reservoirs
US9188697B2 · kind B2 · utility
3Cited by
3References
18Claims
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Key dates
| Filing date | Jan 4, 2012 |
| Grant date | Nov 17, 2015 |
| Priority date | — |
| Expiry date | Jan 4, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P90/70
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Downhole gravity measurements are used to monitor the volumetric sweep of CO2 and estimate the fingering phenomenon if any. The gravity measurements have been found to be effective due to the high density contrast between CO2 and brine or oil which provides better and higher sensitivity. An analytical forward model is used to determine the location and shape characteristics of the flooding front. A strategy to monitor the movement of the CO2 flooding front and to predict the fingering phenomenon is used to provide a warning tool to improve the sweep efficiency, according to some embodiments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.